Malicious PDF — malware analysis report

Static analysis result for SHA-256 e613e4b92907e213…

MALICIOUS

PDF

116.6 KB Created: 2020-12-25 15:19:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a94a2e89808b42187e8f225353f0ed44 SHA-1: ef8b4872ea9a71d7b47bd80cf61922f7983fcefb SHA-256: e613e4b92907e21365e745f13a3afc724548b4cfdb7e31b1f2f2cef04f590ab3
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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://gettraff.ru/strik'. This indicates an attempt to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests a phishing or malware delivery 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://gettraff.ru/strik?utm_term=happier+guster+lyrics+meaning In PDF document text
    • https://cdn.sqhk.co/bagudivibi/TYqV8jf/oxygen_tank_refill_system.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453098/normal_5fdb53ea6c483.pdfIn PDF document text
    • https://cdn.sqhk.co/gigemuji/gvgcTYl/tubal_pregnancy_treatment.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/juvetaso/54142007618.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/brother_and_sister_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/define_accumulated_depreciation.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/cover_letter_template_word_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/cooperberg_benjamin_a_md.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/11684868619.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/pofetixuvitasuxoge.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/keguvivuratejixasawib.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/direct_tv_mobile_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/najogukizivufomiximozal.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_off000189b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189B6 5316 bytes
SHA-256: ddc7af2c07604f630d45c02d90af0efa61794c558184f4c54d41090d4cc1b105
font_01_sfnt_off00019bc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19BC2 12948 bytes
SHA-256: 3f36dffed31eb3244a5a303c420c3837df495bbbda090731227bcddfb0097b6d

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