Malicious PDF — malware analysis report

Static analysis result for SHA-256 8be055b384f131b4…

MALICIOUS

PDF

77.2 KB Created: 2020-11-13 19:08:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ead57be9f7c7fb2975e671c4f72334c2 SHA-1: 15c3408e67da607b9197458b8107ceffe18fce68 SHA-256: 8be055b384f131b4d4b5826ff1f1d997a2947f9a6de4a60b10410d953e8069ed
184 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains numerous embedded links, including one pointing to the known malicious redirector 'traffine.ru'. The document body, though heavily obfuscated, appears to be a lure related to 'Best champs for doom bots of doom', suggesting a phishing or scam attempt. The presence of embedded links and the nature of the heuristics indicate a likely attempt to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffine.ru/strik?utm_term=best+champs+for+doom+bots+of+doom In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374537/normal_5faa303c216fe.pdfIn PDF document text
    • https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/vuwoxoluwetita.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373508/normal_5f8e29357a924.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377403/normal_5fa8204c7f489.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/b75f6a2b26970.pdfIn PDF document text
    • https://sivikowililip.weebly.com/uploads/1/3/4/5/134599649/1f7f52b422e02.pdfIn PDF document text
    • https://fijesawe.weebly.com/uploads/1/3/4/6/134630878/141cf5596d.pdfIn PDF document text
    • https://xamudoniganotew.weebly.com/uploads/1/3/4/5/134509964/11d35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410222/normal_5f9ee968d9115.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/e5bcd2697.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sepawi/tanelasujuti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7066028-4e5c-4ef0-9cbe-f6d58718af50/zoxiwulubeberoxesimezuja.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF150 5552 bytes
SHA-256: bef77f4f1a67574641af77cb94d71a675860e2ee660003581d286bc3d40c8277
font_01_sfnt_off00010403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10403 10588 bytes
SHA-256: 2334615df34815c8e96879ff26187fbc6468666268c6cc07027cfe8e018d32fd

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