Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc72f2ccc7c31239…

MALICIOUS

PDF

69.2 KB Created: 2020-12-30 00:54:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1fa8c7add12d68dcfcc65ec178fd415 SHA-1: 64c874491ecfc57bb745aa38b472bd2dca08169d SHA-256: fc72f2ccc7c3123909f3b3a873db7ae46b04c406199a9216d390ab5b62f05b40
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/strik?utm_term=mummy+returns+wiki'. ML classification also strongly indicates maliciousness. While no scripts were explicitly extracted, the nature of the redirector suggests an attempt to lure the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/strik?utm_term=mummy+returns+wiki
    • https://cdn-cms.f-static.net/uploads/4369343/normal_5f9f8a4526922.pdf
    • https://wodarobasuk.weebly.com/uploads/1/3/5/3/135300597/suxaxexotar.pdf
    • https://notojusuwetu.weebly.com/uploads/1/3/1/8/131871856/eea216abc409f7.pdf
    • https://cdn-cms.f-static.net/uploads/4393641/normal_5fa0ee77d11bd.pdf
    • https://cdn-cms.f-static.net/uploads/4373259/normal_5f8df7b3490d6.pdf
    • https://static.s123-cdn-static.com/uploads/4383798/normal_5fe4f9022a07b.pdf
    • https://cdn-cms.f-static.net/uploads/4382418/normal_5fb5ee82b13a9.pdf
    • https://cdn-cms.f-static.net/uploads/4371240/normal_5f8dc985056bd.pdf
    • https://zofevubofuti.weebly.com/uploads/1/3/4/7/134768025/7507666.pdf
    • https://cdn-cms.f-static.net/uploads/4413987/normal_5fe8c522c9bd8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3b099733-4217-475e-b713-cf4422484564/tubidy_video_indir_mp4.pdf
    • https://uploads.strikinglycdn.com/files/c51b5d20-5bdc-4a98-8e23-413fb6a0afa8/marketplace_insurance_plans_michigan.pdf
    • https://uploads.strikinglycdn.com/files/9f1f5ff6-9366-4392-80c8-9f0591d6cbfc/94079938662.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_off0000d228.bin
1116d0cb326843d8bd5f6e54263d2c74416ee19fbdb165c95094d0c00f3b8b6e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD228 4852 bytes
font_01_sfnt_off0000e2b8.bin
5bd0bed1f313cba7d9a35f9a82c6c378a610a2330dca1c8f4d56c0824bcc88a6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B8 11244 bytes