Malicious PDF — malware analysis report

Static analysis result for SHA-256 883fab0395f1fad2…

MALICIOUS

PDF

72.3 KB Created: 2021-01-15 06:18:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: cb9e9c025e7eaa3f64e42ae17e338711 SHA-1: 7accaec34d5c4665143f5c19c8a897e8097b2319 SHA-256: 883fab0395f1fad29d33c6f7d6eadda4a473762e8ae70cde77811871287d471b
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an external URI pointing to 'trafftec.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to trick users into visiting malicious sites, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

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
  • 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://trafftec.ru/123?utm_term=cold+air+inductions PDF link annotation
    • https://site-1168371.mozfiles.com/files/1168371/55762602320.pdfIn PDF document text
    • https://site-1176767.mozfiles.com/files/1176767/oxygen_tank_for_home_use_singapore.pdfIn PDF document text
    • https://cdn.sqhk.co/lanumakefu/B6hhtwN/hockey_players_hug_during_fight_gif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426262/normal_5fa8819e1fb4f.pdfIn PDF document text
    • https://zokatitolef.weebly.com/uploads/1/3/4/7/134702636/femaso_ruvez.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/lijulijowivaze/barbara_cartland_ebooks_free.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/garmin_nuvi_265wt.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/sparrow_wine_company_hoboken.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_off0000dda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA1 4836 bytes
SHA-256: b27609d54c8a4fac282cdd4854c7f4417728b245db29b35cabc6fd4d5dd44aa5
font_01_sfnt_off0000ee14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE14 11360 bytes
SHA-256: 7c076565017f440553da88d56e4d2e03e83dda41cc0445ebacbe2a44737a03dd

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