Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f9b9ade7771e78e…

MALICIOUS

PDF

180.9 KB Created: 2021-05-02 08:35:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 82f73a62a7b31b1948a6a6381a7925c9 SHA-1: 9ba3eba0824eeee1703d009a339abef0769d6c9c SHA-256: 4f9b9ade7771e78e215e700cfef6311e96f664f5c459943ba9367469dd1bbe10
224 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it's a phishing lure and contains a clipboard command execution lure. The document body, though heavily obfuscated, suggests a lure related to 'Windows 10 terbaru 2019 iso'. The presence of multiple links to compromised CMS upload storage and disposable hosting further supports a malicious intent, likely to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/07cadf9fb908d179301cb3b56cc98ca2/wijexokewamunekera.pdf In PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b7400a019---84840327017.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/0d6a4ab99a4cdf50872adeca4a3ad180/tebisegupizitive.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/08cd952235ed06b1fb2a3995a2d9fcde/90929281190.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/mrrphkcktdtvek3jgg4593aakb/wugefuxigiredimulunaz.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0a93b0c9a---16815549363.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083712ca57a9---19285061113.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160775061b7d35---81195780496.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2e3be69ebb19ac01484bf1974c10661f/8982874522.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/1019e3eba2cd4f888b6092e050d25cdc/bironegizox.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087d61bd921f---fexim.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/50ae5bb7f9d9bdc364ce24e77499bd5d/15239875882.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160884e5feeee1---58111472886.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfadd2cbc7---7342339392.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/697fe35e18298336f47e36e251477072/5336143263.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d68ba3257b---fafesisevavituf.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e811d428b9---tufawirafuwewowutiza.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/7323109768.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=windows+10+terbaru+2019+isoPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/7244cc149ede0e5fb773c830b300e55a/somofosonodimuropewiv.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000235f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x235F2 7192 bytes
SHA-256: b6c0d0976869567613253160bb7000ac46ede4d5affeddfa076dad1acbe6510f
font_01_sfnt_off00024ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24ECB 5516 bytes
SHA-256: 54743784ae072c457894f17a05e7b0c8b8d95d2be915c41fd22b2e3974da2024
font_02_sfnt_off0002619e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2619E 7472 bytes
SHA-256: bb4bafad93d4a9b03052b7d077ebaa9b688d5736ee088686f638afcc2a9805a8
font_03_sfnt_off000274db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x274DB 20492 bytes
SHA-256: 2c72dee05e0b27413266f2ef5066a36f938ae7d755330894386bf5c15c46bca2
font_04_sfnt_off0002adf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ADF3 16560 bytes
SHA-256: 6dffdae8f598d8afa87b7a672f98245706e2a03456ac26d39b38a1b3a429b399

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