Malicious PDF — malware analysis report

Static analysis result for SHA-256 8709bf5a43e907a6…

MALICIOUS

PDF

71.5 KB Created: 2020-12-24 04:43:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95c560c20455230791da8081e98a8e8a SHA-1: d930b289cc0b6d5df9b95b3cbedacc13abd2c332 SHA-256: 8709bf5a43e907a621bbc22379f4d366b88c3563a9ca815e10be8b2563ef894f
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, with a high ML score. It contains an embedded URL pointing to 'trafftec.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a game mod, aligning with spearphishing tactics.

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://trafftec.ru/strik?utm_term=blood+glory+2+mod
    • https://cdn-cms.f-static.net/uploads/4383568/normal_5fbc9b43af325.pdf
    • https://cdn-cms.f-static.net/uploads/4413013/normal_5faaaeeacfae4.pdf
    • https://static.s123-cdn-static.com/uploads/4455669/normal_5fc3da7ecb649.pdf
    • https://cdn.sqhk.co/mepetiruzi/g4F1Sic/nededivirirukilawuzos.pdf
    • https://tejebufu.weebly.com/uploads/1/3/4/3/134353082/1d9ca283.pdf
    • https://cdn-cms.f-static.net/uploads/4403282/normal_5fa8ddb3b00f0.pdf
    • https://raxuzorufureraw.weebly.com/uploads/1/3/0/7/130775378/dazosaxipebabam-gijipabekalama.pdf
    • https://static.s123-cdn-static.com/uploads/4385038/normal_5fcf5cab168f6.pdf
    • https://cdn.sqhk.co/zewuxumaro/FZggQxA/ruguburudaxum.pdf
    • https://gajegebukorivip.weebly.com/uploads/1/3/4/4/134487765/gavifi.pdf
    • https://cdn.sqhk.co/kibizatududo/fsLhgom/45343114004.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d5a3ccee-882b-4bf3-80a1-16e6284b5746/35923121810.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6f8.bin
fb4cba9501d5748ce90b31f8f2f108e3f7b90760989c809adcbb5bcf4f57b16d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F8 5988 bytes
font_01_sfnt_off0000dab9.bin
5509aa7905df9a0c87baf1ef46cabbc1e3a1a5a186d502f90aa150eacafe9e75		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB9 5040 bytes
font_02_sfnt_off0000ebd6.bin
3ada32279278c4cd64db0d43ebaf73fb463595be6c396706515ed260902d76a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD6 10984 bytes

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