Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2ce9c75845711ad…

MALICIOUS

PDF

60.2 KB Created: 2021-05-15 22:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40ffb6336351d89279193db91497b38f SHA-1: 35b1d6cfc39caab35d0d82ded261945cd2a95843 SHA-256: b2ce9c75845711ad37fa65178e10348dfaacdbe6fbb9285886c4c54824d34eb5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to host malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt, likely leveraging a vulnerability or social engineering to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8123

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160756df845987---famebeg.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c36097051---4364213740.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094bb0183ec4---42139947303.pdf
    • http://kibbkw.com/uploads/file/48188550325.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dacbd80489---4429933156.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/98b263ffc28e824cd446f1aec414ac07/95343785564.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712356a970a---14203520973.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609d613ee5fc0---13074654556.pdf
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/bfboujjsa3ibhfrb7t2im0ac22ejsdk1/zalik.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160781684a837d---mesuloxa.pdf
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/7122d27371fe2fc663456db0d9cf352a/49406418205.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607afc3f34df3---wumabavagemut.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb559e4f6d---jofimexaxuvu.pdf
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/voknss1g4lduvicamjbjjb40b6/31063942100.pdf
    • http://czdashan.cn/uploadfile/file/2021050709140873499.pdf
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/f011a8fh7gu3eq5pp502gbsskf/garijoxafadaxejaxanizot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=harper%2527+s+bazaar+uk+march+2019+pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d95c.bin
8075bcb493d2bef37bf6e3771fff61aff03943b17f793e72180fa208de35911b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD95C 6092 bytes

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