Malicious PDF — malware analysis report

Static analysis result for SHA-256 7261b318be8bfb4d…

MALICIOUS

PDF

69.6 KB Created: 2021-01-15 19:41:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7ec4fa6c96a4d1bc777a0b5a4aced563 SHA-1: 773df12fba3fa8fe0bf47b5afb9ce5c3bae941a4 SHA-256: 7261b318be8bfb4d2c009255a8c7ec8e9d0f0db9dbbdfd6636cb3218963a9f0a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links pointing to known malicious redirector infrastructure, specifically 'https://ggtraff.ru/123?utm_term=adios+mama+movie+summary'. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a movie summary, which is a common tactic for phishing or malware delivery.

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://ggtraff.ru/123?utm_term=adios+mama+movie+summary In PDF document text
    • https://cdn.sqhk.co/tikexumivu/hyshcnt/nick_mullens_agent.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411717/normal_5fd33080f04ec.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/iijv50A/38783791151.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369631/normal_5ff9c12a05cac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419204/normal_5fc4a3ffca92f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417670/normal_5fec864dad5ad.pdfIn PDF document text
    • https://cdn.sqhk.co/doxowite/jhigLji/renevebusexebetase.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382414/normal_5faf36d1ed617.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376875/normal_5f8aeff735936.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5fd8ca9a8be1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446915/normal_5fbc0bd285b60.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lebaxa/68833215646.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/math_multiplication_worksheets_4th_grade.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC698 4788 bytes
SHA-256: 9f6cf7c3a0600bbe8ad7f2a3fb20b387ab7da7c3b5b86bc51a56240238446217
font_01_sfnt_off0000d6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DF 10688 bytes
SHA-256: 6c629be055e76f907600d978a398c0b3209fecae11bb1325541d91324f6c6e05
font_02_sfnt_off0000fa44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA44 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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