Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b3604acbd17a284…

MALICIOUS

PDF

55.8 KB Created: 2021-06-05 01:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76b83646bfd4278bbf357dc8abbc3b44 SHA-1: a40fa48af99b444d1294a42d7ba46d4e607f8d6d SHA-256: 2b3604acbd17a2845c1f168cf90f591dace15967154cc0489810dd73e59b9bb2
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers. It contains numerous embedded URLs that point to compromised WordPress sites, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8429

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://pixomot.ru/uplcv?utm_term=what+is+suffix+on+dmv+application
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/u64nlj6s1oqlkar06qtgrc8dth/4320962494.pdf
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/a0bce90f59b5cdb54fdbc34e49f047d4/gafepubafozukirakoxalav.pdf
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/cec89809dfaa1ae23b8c332d5cd400b0/9212706649.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/939ff6a896f3fd5ece35a9f6ddffbab8/96949133976.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606d531b871ee---vefeluvevuxizukukekibulap.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed0b5db15e---17781501810.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef5236df3c---joziw.pdf
    • https://anjingliar2.com/contents//files/lelutafarelovorivej.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608fdb053b6f9---80854005755.pdf
    • http://aldara-latinoamerica.com/userfiles/file/bijinugomizavupeb.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/ba3285773d8234ec31a771ef15fa3f3f/34492530760.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16086a2510f579---dubozutipurudizeziwivete.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1607ded6d653dc---76215311635.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/514ea3c6c51474178b9d95241423db70/45428952264.pdf
    • http://re-view.online/fckFiles/file/77497707208.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/1vinqj69kf7h0r1bhhe5qejj0f/tebuw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1ff.bin
cb1b4dbaa116da54a6134ae8e19bf70bc12390714d5e3480dd2319afd4440384		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1FF 5440 bytes

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