Malicious PDF — malware analysis report

Static analysis result for SHA-256 0104cf8030a57684…

MALICIOUS

PDF

77.8 KB Created: 2020-11-28 04:33:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3d0e6e2f1cba707656f78a321936d28b SHA-1: 07db9f9ab99e845044ec3716304a0ccd690052f5 SHA-256: 0104cf8030a576840cb82d5257988411cba4a3bf460d314648eaa3e325d4aa66
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://traffine.ru/strik?utm_term=aura+kingdom+lancer+leveling+guide'. This URL is likely used to redirect the user to a phishing or malware distribution site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL strongly suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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=aura+kingdom+lancer+leveling+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f8749c4eff55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448341/normal_5fa335a17d402.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5f90a445f1a96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384160/normal_5fbd036dc1e61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372074/normal_5f9bacc61531d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414341/normal_5f9d06d9ea11f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385235/normal_5f8dc539355b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369932/normal_5f880259c8ea5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368219/normal_5f8b23430f84a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f71f950-907b-4da3-b8ec-a2f7d405d16a/paxinajipa.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/atualidades_para_enem_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/lalulusoz.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/84422620162.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_off0000f2a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A3 5192 bytes
SHA-256: 0907d3ad47432a647e8f894a990105787cb71fe23432618e9a0cef97b2b45fb5
font_01_sfnt_off00010442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10442 11124 bytes
SHA-256: cdb1fb8208b88a246eba47b521765585b209ac916c5362f067b32b4c74977c1f

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