Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c13758717a8b6b9…

MALICIOUS

PDF

72.1 KB Created: 2020-12-28 03:55:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 436c1a5ef55834daa985ab265b1b9491 SHA-1: 1eeb1262e6b1ca08f4421c9934c2bed61f4f776c SHA-256: 6c13758717a8b6b91a53e61ae8a87b49934f757161a4e81f428a180e5433ba94
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to a suspicious domain, traffking.ru, which is likely part of a phishing or malware distribution scheme. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the external URI strongly suggests a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/123?utm_term=non+germane+amendments
    • https://cdn.sqhk.co/xoradofexul/fieiihh/18410002708.pdf
    • https://static.s123-cdn-static.com/uploads/4423471/normal_5fcab564aa9ac.pdf
    • https://cdn-cms.f-static.net/uploads/4367667/normal_5f87611ad7c90.pdf
    • https://cdn.sqhk.co/solumapidema/Higju0D/50210650405.pdf
    • https://static.s123-cdn-static.com/uploads/4389097/normal_5fde33663defe.pdf
    • https://cdn-cms.f-static.net/uploads/4497695/normal_5fe9064874b0c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1b48ee30-3356-4feb-aa94-040b74565575/54776876607.pdf
    • https://uploads.strikinglycdn.com/files/6952337c-74ff-43b3-adec-44c96e0fe2e1/71487201125.pdf
    • https://uploads.strikinglycdn.com/files/25d750ed-05e4-4cbf-babb-9e44da6c4375/vetidobapud.pdf
    • https://uploads.strikinglycdn.com/files/85c3c118-34fa-487a-9273-a6344dd9ec59/free_medical_microbiology_textbook.pdf
    • https://uploads.strikinglycdn.com/files/f186fcef-f31f-4c86-b56f-d32e3de8ccc3/pokedisonemuvewa.pdf
    • 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_off0000ded2.bin
eb94c086960fcd1c3e1fb26c47f12d1d7e4d25a32fefc88ddbb958ba519a852e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDED2 5084 bytes
font_01_sfnt_off0000f008.bin
bf8ff212bc22e691d00ff338f14b4f7271326b1806fe879bc7d6ecf7b59962e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF008 10636 bytes

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