Malicious PDF — malware analysis report

Static analysis result for SHA-256 44cd617cac109888…

MALICIOUS

PDF

76.5 KB Created: 2021-02-12 04:53:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f89f08263f3df7afa5a539a46644c70f SHA-1: 36a93d3b560a9ad581ebd85c50ed1aa6f2cbdf8a SHA-256: 44cd617cac10988865bb730415fdeb22b2112a49a44bd57d27f861d1a1767e55
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'seumenha.ru', which is likely part of a phishing campaign. The document body, though heavily obfuscated, appears to be a lure related to search terms, suggesting a social engineering tactic to drive users to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/123?utm_term=large+cooking+pots+non+stick PDF link annotation
    • https://cdn.sqhk.co/rurizibaxami/WjjwGEI/mezafiwerokuleropa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426955/normal_5fec31acc914f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480594/normal_602071d4afea5.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/l3gfogc/dikopidelixi.pdfIn PDF document text
    • http://datingdate.site/95532344365emh8a.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/Vjcghhe/wukufutozutaturome.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387701/normal_600c095abd161.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445115/normal_5fe2884bdf664.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/gaxuremewuger/basic_korean_language.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/navy_uniform_allowance_e3.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/99231837059.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/java_design_pattern_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/58108975755.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/teamviewer_gratis_terbaru.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/integrative_behavioral_couples_therapy.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_off0000ef95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF95 5072 bytes
SHA-256: ae780440a88533f273525a2bd11d15f74172b62ca5f75917d5f085465851a959
font_01_sfnt_off000100f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F5 10580 bytes
SHA-256: 07c3a0998a76d5e382769d3d7cd3e13571e9cbbdf8b584b20ca2d701f57e0435

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