Malicious PDF — malware analysis report

Static analysis result for SHA-256 e70866910a7238af…

MALICIOUS

PDF

67.7 KB Created: 2021-01-01 06:36:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0eeb6f263c1399387998b88858cb7255 SHA-1: e6c1187d833ab85d53df3f96522e624dd0cf1074 SHA-256: e70866910a7238af8429df9c17e3135c6e9a508ca45ca3012bc350f63ea91930
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafffi.ru', which is likely the malicious destination. The document body, though heavily obfuscated, suggests a lure related to 'word cookies cheats strawberry 15', indicating a social engineering attempt to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/strik?utm_term=word+cookies+cheats+strawberry+15
    • https://static.s123-cdn-static.com/uploads/4417535/normal_5fecaf7fb8a4a.pdf
    • https://cdn-cms.f-static.net/uploads/4374177/normal_5f9d51af2387d.pdf
    • https://cdn-cms.f-static.net/uploads/4406464/normal_5f99786c7e17c.pdf
    • https://cdn-cms.f-static.net/uploads/4489730/normal_5fbbd4942c73b.pdf
    • https://cdn-cms.f-static.net/uploads/4369919/normal_5fb258c1e34d9.pdf
    • https://cdn.sqhk.co/gajerivab/7lZ6igc/fatatevagixo.pdf
    • https://cdn-cms.f-static.net/uploads/4467927/normal_5fa6725c5c7c8.pdf
    • https://cdn.sqhk.co/tavikagisato/Mibheij/xubabukajutape.pdf
    • https://cdn-cms.f-static.net/uploads/4369920/normal_5fb7925d97ba0.pdf
    • https://static.s123-cdn-static.com/uploads/4370090/normal_5fc67eb6f0a09.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kuboki/zezidavijuxefunuf.pdf
    • https://uploads.strikinglycdn.com/files/27a602a2-18c8-405b-9152-7bed11ad6809/rodeludo.pdf
    • https://s3.amazonaws.com/sajatesawodiji/fafufibujumonaw.pdf
    • https://uploads.strikinglycdn.com/files/31551809-17a7-43e7-9b2e-cdb4e86547ad/89856870970.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_off0000cc6e.bin
c02ef2780d77e835cc03cc894283f985bba820c29af6a253361b07dad9879bbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC6E 5584 bytes
font_01_sfnt_off0000df90.bin
ced27b46e50875e153a64b58c7bcb0e5738a55fbdab407a75e26b9bdf8d7d12f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF90 10164 bytes

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