Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c89c81bbc8578bd…

MALICIOUS

PDF

146.8 KB Created: 2021-02-06 11:21:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a5ddc6d2156a6dbed7156f30095b2c07 SHA-1: 1caee33e648eac3e3d88cf3d7250ea1f90d1fae7 SHA-256: 9c89c81bbc8578bdda23715a41a31ce4b4fe42d55e22975492582919269f5d0c
134 Risk Score

Malware Insights

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

This PDF was flagged as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous links to disposable domains, suggesting an attempt to redirect users to malicious content. The presence of external URIs and the 'SE_INVOICE_LURE' heuristic indicate a phishing or scam attempt, likely to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=bill+of+exchange+act+1882+pdf PDF link annotation
    • https://movediwifed.weebly.com/uploads/1/3/2/6/132695881/0cd061c12492d6.pdfIn PDF document text
    • https://fixemebipufuw.weebly.com/uploads/1/3/4/1/134131586/0eded24b203b76.pdfIn PDF document text
    • https://cdn.sqhk.co/kugorazig/fggghgg/yalla_ludo_ludo_domino.pdfIn PDF document text
    • http://agencymedia-ig.com/super_dancer_chapter_3_dance_winner_2019_namesc9q4.pdfIn PDF document text
    • https://cdn.sqhk.co/sizozizaj/55gdjic/88928946625.pdfIn PDF document text
    • https://cdn.sqhk.co/gederanew/jdMljfm/23633406665.pdfIn PDF document text
    • http://websporizle3.com/xusetixirerogataxb0e4b.pdfIn PDF document text
    • http://copyrightreports.com/orokin_cell_farming_2019giqtk.pdfIn PDF document text
    • https://cdn.sqhk.co/sileluzorupo/WSFidih/51991477525.pdfIn PDF document text
    • https://cdn.sqhk.co/gujuvizaja/YgeGgdF/51769230680.pdfIn PDF document text
    • https://mivezosikobo.weebly.com/uploads/1/3/1/4/131453246/3417351.pdfIn PDF document text
    • http://requiredjokblog.com/68986850808qfw3r.pdfIn PDF document text
    • https://cdn.sqhk.co/wisulekekij/6zmmcgU/69501555628.pdfIn PDF document text
    • http://hookup681.site/359187450681bvsn.pdfIn PDF document text
    • https://cdn.sqhk.co/pafevola/aChhgd4/62743384993.pdfIn PDF document text
    • https://cdn.sqhk.co/naxusepimosa/eBJgdje/fuvufixetidaje.pdfIn PDF document text
    • https://mikixobitesa.weebly.com/uploads/1/3/0/7/130776626/raxawegize-regif.pdfIn PDF document text
    • https://cdn.sqhk.co/fanabezom/jg4hchh/26249822989.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/wovugi/79092870792.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/97911282994.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/37554798181.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/kewadikotol.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_off00020607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20607 5640 bytes
SHA-256: 8b3d9cd9be394317d281be4baa77eda3177b85b3d293a80f22fd1c827c99ad39
font_01_sfnt_off00021950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21950 10436 bytes
SHA-256: f694381781bff7991da275877713d05b7e6985c01f27a14fb733767b150c3cc1

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