Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a401901df5a7b32…

MALICIOUS

PDF

64.1 KB Created: 2020-12-19 14:55:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67afcbf49fbb2b749f1062839d845e22 SHA-1: dc4200fb6d6387cec2d618d51fb252ec215b184d SHA-256: 5a401901df5a7b320566ac6ea7ee50039513108af1c8c71ab0d97c1b40498beb
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, specifically as a phishing trojan. It contains an embedded URL pointing to 'trafffe.ru', which is likely part of a phishing campaign. The document body, though heavily obfuscated, contains text related to 'hp simplepass', suggesting a pretext for the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/strik?utm_term=what+is+hp+simplepass
    • https://cdn-cms.f-static.net/uploads/4394077/normal_5fbc6a0c3a2f8.pdf
    • https://cdn-cms.f-static.net/uploads/4425726/normal_5fbb57d384e31.pdf
    • https://cdn-cms.f-static.net/uploads/4460233/normal_5fb9cf979a74a.pdf
    • https://cdn-cms.f-static.net/uploads/4407299/normal_5fa9d389c25c9.pdf
    • https://static.s123-cdn-static.com/uploads/4471995/normal_5fdd315eea4a4.pdf
    • https://cdn-cms.f-static.net/uploads/4425255/normal_5fd5f879d343d.pdf
    • https://cdn-cms.f-static.net/uploads/4486969/normal_5fbac0f22ef88.pdf
    • https://cdn-cms.f-static.net/uploads/4461509/normal_5fb2c85f12b7b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc587b12bbd74065825ecf7/t/5fc7ea870581dd30a08c113c/1606937228488/5_major_religions_of_the_world_map.pdf
    • https://static1.squarespace.com/static/5fc1a5383dfdd95b60da62a1/t/5fc31b0d5147b148049930cf/1606621978508/lonibaju.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcef65b4c4d833b8bc5897/1606217573854/sleigh_ride_lyrics_ronettes.pdf
    • https://static1.squarespace.com/static/5fdc80e9ff99f865bfec01c9/t/5fdd07d05e120c428cd145bc/1608320977034/xapubapezetemekizenalile.pdf
    • https://static1.squarespace.com/static/5fc1619768612547ed61873d/t/5fc44ce0fa04221c71a89adc/1606700257015/chemical_nomenclature_worksheet_answer_key.pdf
    • https://static1.squarespace.com/static/5fc13e7dd49dd12447366960/t/5fc2b874173fb5383bfccd08/1606596725232/48641143122.pdf
    • https://static1.squarespace.com/static/5fc532e1bda9c57a97da3ebd/t/5fc8ad9b6031f47386257f2b/1606987164350/sizobuvof.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_off0000bf57.bin
8952fe4f70421acf9fe6bc0e941534e4c5b1769465080c8697aa9696ee3dce71
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF57 4976 bytes
font_01_sfnt_off0000d02d.bin
57dfc0dc7b8ab23c1aeb407c9254503ab20193f6ef4fc75902d0b1ea03d18637
pdf-font-stream PDF embedded font (sfnt) at offset 0xD02D 10532 bytes