Malicious PDF — malware analysis report

Static analysis result for SHA-256 9acfdaea3df84f83…

MALICIOUS

PDF

65.6 KB Created: 2020-11-19 20:30:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a82f18429cddf1dfbc72fd3cc60ed510 SHA-1: 16a677ec5132186388b0743838705d58065718d4 SHA-256: 9acfdaea3df84f830f4c79d3a05233190ea40e99b14450d38d0377e28c1d845c
156 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to 'traffset.ru', which is flagged as suspicious and likely part of a phishing or malware distribution scheme. ClamAV detection and ML classification further indicate malicious intent. The document body, though heavily obfuscated, contains text related to a game ISO, suggesting a lure to a malicious site.

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
  • 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.
  • 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://traffset.ru/strik?utm_term=game+bloody+roar+3+ps2+iso PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369920/normal_5f88759671c3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373520/normal_5f8f9bfaf321d.pdfIn PDF document text
    • https://rugalasaludazi.weebly.com/uploads/1/3/4/6/134683923/julijekej.pdfIn PDF document text
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/deece8dbd8fb1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379474/normal_5f8bcd315c75b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408180/normal_5faf6e9a74280.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/fulazelof/ecgs_made_easy_6th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/financial_statement_audit_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/doj_ig_report_horowitz.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/bavekuzito.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/64234768346.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_off0000bde8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDE8 5672 bytes
SHA-256: 3a1ae2aa0be34ce71ce4f63ae5a16d8b08cc18808978732dc1ab5d94f67869b1
font_01_sfnt_off0000d125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD125 12620 bytes
SHA-256: 4d673a58ba14ef9e3a189fe1a8d8181d87f00b917eaf5722023535828489a027

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