Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae4e0ebfa873e1c…

MALICIOUS

PDF

82.9 KB Created: 2021-08-01 16:14:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: c9ffc6fb5e26e383bd8477e898273922 SHA-1: 8456393800cf534a1e6202b5da19f417753d9d28 SHA-256: 0ae4e0ebfa873e1cb7a408ae5923e7ec514f9254cb78b456d8043666065f9bf4
164 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting an attempt to lure users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. The presence of a download button lure, though low-signal on its own, reinforces the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://sailstudy.in/ckfinder/userfiles/files/nodixipufufan.pdf In PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be64020e195---80322529621.pdfIn PDF document text
    • http://mp-journal.com/media/file/62923189074.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e42705f46f---63518156851.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608751c1397d6---60671198193.pdfIn PDF document text
    • http://josephlillianmorrisfamily.com/clients/59960/File/bewuzosi.pdfIn PDF document text
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/52943a37c9b6bc9db15fbdf6a248bbe5/9281355594.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160705cf6502b3---kovavizixodebi.pdfIn PDF document text
    • http://pinxedien.net/upload/files/11957788064.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/85310927989.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/a9noacdtp21kqb1hseapjqbf49/50552059134.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/4c4791166967371193d87b32882db45d/nafubaromadudesar.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/25707661967.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/11798660003.pdfIn PDF document text
    • http://cdseoulps.com/uploadfile/fckeditor/file/60374350768.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/8e83e9b42c1c530418dd1754403dabc5/dixosovotepodabuvojinat.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/2462f49d51efdd4e6bc9993437a79419/39636944422.pdfIn PDF document text
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/suburubiv.pdfIn PDF document text
    • http://patokapugsnkisses.com/clients/61143/File/41271942810.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/r0l7n1a1a5fd2g8guq0r7mk3kk/16464282367.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/9e23b64660ae1235c1652e1b4c58b285/33045712382.pdfIn PDF document text
    • https://businesslife.com/content/file/7557565198.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/76611668818.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/590294884e2cea5b041b060a05500efe/kesalebakazij.pdfIn PDF document text
    • http://capitalclassof1971.com/clients/4/4c/4c1e4f015ba9b8bec237dc1ca705466d/File/nosexi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=gf+bf+song+download+mp3+free+download+bestwapPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C1 16988 bytes
SHA-256: f684193a50506af867d59e4e4d9ae4c531b4e78d00fa30e96d9a1769d7e82736
font_01_sfnt_off0000f1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A8 17948 bytes
SHA-256: d55fe48361a3be88cea8782a4d26c56bc1d10bcc8cfe622be68270a62adac6da
font_02_sfnt_off00010a93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A93 11184 bytes
SHA-256: 52ec18d7898ad732f6b4b96342237c86005d0bf3736372841fe3b79c45e49cea
font_03_sfnt_off00012472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12472 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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