Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dad96f60798223e…

MALICIOUS

PDF

70.1 KB Created: 2020-12-31 19:01:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 6d5a8e33511fbf3997e4d751e062dbad SHA-1: e1fec6cf88cd988845b779dd8b5616ccd510f545 SHA-256: 9dad96f60798223eccebc8538f4eb3e24f647c3491c340c519a4aa89ee128c4e
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with at least one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of a link farm indicate a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=jungle+adventure+game+download+dedomil In PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/xunaxavelikuta_xidotesebolew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477626/normal_5fd2faee4de6f.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutorixo/zjg2ghs/escape_room_board_game_temple_of_the_aztec.pdfIn PDF document text
    • https://cdn.sqhk.co/xanodujijefu/fgj1ajc/mitabivesezagubose.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385415/normal_5f8ef050b13d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392668/normal_5f9c96dfa4638.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385038/normal_5fcf5c63ee9d1.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxozowaki/hjgjidK/viral_vs_bacterial_vs_fungal_meningitis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444102/normal_5f9c82bc88b68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447647/normal_5fbabcc20ff9c.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/lupebesu/redapezebupuwuz.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/championship_manager_2002.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_off0000d67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67E 5108 bytes
SHA-256: 131f61af7103b71a8141b7e0463b6c9b295b20afe2323616fd74bed69db1bdfd
font_01_sfnt_off0000e7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E1 10472 bytes
SHA-256: 56032b31c24872b3888d3f76fe45321011b1d1d9c5ccd80e0f5bdb39f235f85f

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