Malicious PDF — malware analysis report

Static analysis result for SHA-256 f931ee0e2da918ca…

MALICIOUS

PDF

72.2 KB Created: 2020-12-25 05:21:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: d705dae806b4d6a617f23b71246e15fe SHA-1: 2cef3991b6fc0d86e30f54e37644af8e07a84774 SHA-256: f931ee0e2da918ca4c681f9a9152cc5859130766ac6e4ee3a70d22382b4a2a86
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains multiple external URIs, including one pointing to 'trafffe.ru', suggesting it's designed to redirect users to malicious websites. The presence of numerous links and disposable hosting further supports its role as a link farm for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://trafffe.ru/strik?utm_term=go+climb+a+tree PDF link annotation
    • https://nurafotupitu.weebly.com/uploads/1/3/4/4/134495453/nazetaridegereze.pdfIn PDF document text
    • https://sizuginoten.weebly.com/uploads/1/3/4/4/134490660/7082200.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374847/normal_5f99e8a3d9063.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5f88d5a2780ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370278/normal_5f93ca762fea1.pdfIn PDF document text
    • https://woruvewuz.weebly.com/uploads/1/3/4/4/134400058/nezejimin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501027/normal_5fddcf7194a37.pdfIn PDF document text
    • https://kemovovem.weebly.com/uploads/1/3/1/4/131408999/3153768.pdfIn PDF document text
    • https://wixurawitubeza.weebly.com/uploads/1/3/4/3/134319602/5f77b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404730/normal_5f9962ae15ea6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462736/normal_5fe24482b0c44.pdfIn PDF document text
    • https://binaxurekise.weebly.com/uploads/1/3/1/3/131381555/7d221b2d.pdfIn PDF document text
    • https://gazumewus.weebly.com/uploads/1/3/4/9/134901575/ed73d79c.pdfIn PDF document text
    • https://lagonola.weebly.com/uploads/1/3/4/8/134851586/jizewizada.pdfIn PDF document text
    • https://vulabomanuxuw.weebly.com/uploads/1/3/4/8/134857085/daxav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476281/normal_5fdbd3258a8ed.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_off0000de8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8A 4940 bytes
SHA-256: 8c38eb2040f5801740a08157a5a6e46176ec1238f378128dfdce74c81d081a6d
font_01_sfnt_off0000ef42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF42 10760 bytes
SHA-256: c2604e3674a8aa42daba3fe253c991b09adca5bccfd76f681a3b2f27885c1158

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