Malicious PDF — malware analysis report

Static analysis result for SHA-256 697794ced2bada2f…

MALICIOUS

PDF

84.3 KB Created: 2021-07-27 00:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 138b5fef736a92cddc61b72fef62d660 SHA-1: 2501a025f911c2db21e8b256ea66f00b07ff2029 SHA-256: 697794ced2bada2f47812bc79e4501d1fa4e304cfab5561d611b85da9e5c3990
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The sample is a PDF document that exhibits characteristics of a phishing lure, including a link farm pointing to potentially compromised WordPress sites and a direct instruction to the user to execute commands via a clipboard lure. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the document's structure and heuristics suggest it is designed to trick users into downloading further malicious content or executing commands.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a990b593cfb---vuwagunelepefelifabonir.pdf In PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/351ee98e8d15dfe30f4fe00b48cb374e/8900217715.pdfIn PDF document text
    • https://csn-alliance.com/data/files/nidirevabuwadoke.pdfIn PDF document text
    • http://lsneotek.com/ckupload/files/74039143663.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1c986a93f---46006754699.pdfIn PDF document text
    • https://stradatextiles.com/upload/ckfinder/files/38621439533.pdfIn PDF document text
    • http://greenplanetnepal.com/userfiles/file/98014186270.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/c9jqhl3l1vc6s5evj53gdou91i/mijexevadeliniw.pdfIn PDF document text
    • http://uptownfallschurch.com/uploads/files/93951129533.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/ia5e0pvarrmm23h70a7hn1um3n/weluwugavuzapevugiz.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088a5575d8cf---fonuz.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/niwuke.pdfIn PDF document text
    • http://pcccmiennam.com/media/ftp/file/44639713242.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16097b63f0eb0b---mijetopipofarepizu.pdfIn PDF document text
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/moe5c88b3bk0d6lh7sm50lqjgr/20735962912.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/76822563364.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/2e793f7eafc24068c17df97dc55b4fda/69539760151.pdfIn PDF document text
    • https://amgaa.org/temp//files/fopasolapoxiwuxigegow.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/8373fabb2fae20bf93853bc54ac50a77/25403740596.pdfIn PDF document text
    • http://www.nachtruhe.info/up/files/xigivojemuzeduwirawazo.pdfIn PDF document text
    • http://fini.hu/userfiles/file/nuxovurukupenupumirazuv.pdfIn PDF document text
    • https://detskeihriska.eu/ckfinder/userfiles/files/pezorinidux.pdfIn PDF document text
    • https://rafaela-motores.com/userfiles/file/ninuwotenobopijobafavok.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/93036973cec3d8c4623d75b39e2f5eda/wuteg.pdfIn PDF document text
    • http://indianaquesters.org/clients/9/95/9573c8d6e108c9729a37356986dd5b5e/File/bumovugotikiwigetisete.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=ryobi+line+trimmer+service+manualPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE280 10856 bytes
SHA-256: 097fb44611c0d57d841c26381da05d04a882eaa1b167312c1e8e072fc514abf7
font_01_sfnt_off0000fba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA5 18812 bytes
SHA-256: f8a8f7b3df850d650b493bccc5fb8db530916a0276a19115d8185688ff87d752
font_02_sfnt_off00012bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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