Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa1fac6861453ce9…

MALICIOUS

PDF

69.7 KB Created: 2021-05-03 18:24:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aed737739ab67efffb1cd33c93bb9440 SHA-1: 81f7eb0e7f9422d0677b5ac378ad894cbbf2cb0a SHA-256: fa1fac6861453ce984e25a6894e7b08581a73a5f1c1962a36a5ba91b4590427a
126 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to host and distribute further malicious content. The presence of embedded URLs and the nature of the heuristics suggest an attempt to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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 http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ad1582aed---41892954037.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b8a22fc7b---78070618654.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160782d86235b1---fateme.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0930ba9aa---4432207700.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/l61b0gl64de2rrgvl2pl8u18q0/47644876097.pdf
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdc318a525---xamigovik.pdf
    • https://ludifrance.fr/userfiles/file/sinekel.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16070373d6c44c---vamebefofenedevasukebad.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607399a22b850---vamipujonepogi.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/oqtqgtqqnf5aphqivdthnobcch/78185195368.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/73e709acce60327cb60bd973a4f7fa94/60569506599.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/mjagqu1itu00t88ue65iihbu68/wogavumojezifitujoked.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e51c31a06c---39671667790.pdf
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/hh3r4n1toe5tds3dc0aumpgg3i/29058362718.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/35bae78cfc68798f39a9f8ebf6996afa/71406513784.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/2e5295fbc8e7757a2d998c9c4af16b51/zivunejigerosabasigas.pdf
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070bd92b09f1---69429041540.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=leaps+and+bounds+dog+food+feeding+guide
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5a1.bin
a51c98bb0f01db1c643f7a90af848f9e5d3f1a29668916a72d6c1cc575684b1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A1 5160 bytes
font_01_sfnt_off0000e743.bin
27c0dbead34b1226e5a6802a9ec906788413b3ce670e63edb8689609a6f3bdb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE743 10168 bytes

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