Malicious PDF — malware analysis report

Static analysis result for SHA-256 17eeb69c8280c876…

MALICIOUS

PDF

83.8 KB Created: 2021-05-28 14:30:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3cb69817e786b0bbb311e72593173f03 SHA-1: 2429785c08294b3c082b8477b7177d8906d82200 SHA-256: 17eeb69c8280c876d272e9cc1969429bfa263fde2a5f0b588f5cd2304fa5af17
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The primary URL, 'https://soxebez.ru/strik?utm_term=gta+vice+city+cheats+download+apk', indicates a lure related to game cheats, likely to trick users into downloading malware. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://soxebez.ru/strik?utm_term=gta+vice+city+cheats+download+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412606/normal_601245cd1faf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405414/normal_605070f54e0fd.pdfIn PDF document text
    • https://samarobiratepiw.weebly.com/uploads/1/3/5/3/135327643/vevavisalowebo_xoputozif.pdfIn PDF document text
    • https://wenadowepafim.weebly.com/uploads/1/3/4/3/134314247/wivefalolo_senikukafofu.pdfIn PDF document text
    • https://dajikapepexav.weebly.com/uploads/1/3/4/5/134597014/3318331.pdfIn PDF document text
    • https://lepatoketi.weebly.com/uploads/1/3/4/7/134732542/6330207.pdfIn PDF document text
    • https://binufigelivu.weebly.com/uploads/1/3/4/7/134775083/3811860.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448540/normal_5fde06bc2abc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418013/normal_6022e6da4c033.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383573/normal_5ff3e52cd6f8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464056/normal_603bc7705201a.pdfIn PDF document text
    • https://fotavisemaro.weebly.com/uploads/1/3/1/4/131406710/d4fae.pdfIn PDF document text
    • https://jikodidujur.weebly.com/uploads/1/3/5/3/135319234/fevabexof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485301/normal_5ffff33bb1b10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450734/normal_60568de0eea64.pdfIn PDF document text
    • https://jatufabafalili.weebly.com/uploads/1/3/1/6/131637938/46e28.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00010ace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACE 5412 bytes
SHA-256: b63342f92cd7ac280af972a1791f01943361d60a3723af62b010b5d478d25dbd
font_01_sfnt_off00011d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D5D 10796 bytes
SHA-256: 02b30d32982691c16319d95fae481ffc74b6a68e98af7cb2fa44b03d908adbbb

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