Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a5203f76d4dccd…

MALICIOUS

PDF

96.4 KB Created: 2021-09-18 15:58:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2828e7492fe8c927f1852152269ee814 SHA-1: cf05586dbc9265652e9a6cc8d82463364ea7736f SHA-256: 46a5203f76d4dccddba09e4e3d0dbef649324f7fa01529dcc083d9d4794ae8a1
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of an advance-fee scam. It contains numerous links to external PDF files hosted on disposable domains, suggesting a link farm designed to distribute malicious content. The primary lure appears to be related to claiming a prize or parcel, a common tactic in advance-fee fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • 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://infrive.ru/uplcv?utm_term=justice+league+full+movie+free+watch
    • https://dintek.eu/uploads/file/19118341297.pdf
    • https://www.esicm-old.org/admin/lib/ckfinder/userfiles/files/93395361632.pdf
    • http://cluboutletmoto.net/campannas/file/vasudonejibofufazijide.pdf
    • https://hideab.se/tc/Mediagalleri/file/sopewixexisamuvodene.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161378960411fa---rojeselumuradumo.pdf
    • https://zagorjeadventureteam.hr/files/jadixetadijafobomesuz.pdf
    • http://www.anaja-inter.org/public/file/62254028718.pdf
    • http://mazraeir.com/images/upload/files/37033483586.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613149af6839e---xidibujitogopufeg.pdf
    • https://ashleymongolia.mn/uploads/files/jenavovajimalebej.pdf
    • https://kolbandibileklik.com/resimler/files/japosokoxijinubawimutu.pdf
    • http://imcborivali.org/userfiles/file/susomuwuvevob.pdf
    • http://intimatehotelpattaya.com/image/upload/File/nipejafab.pdf
    • https://fa-vietnam.com/webroot/img/files/dakurawuzodojuwere.pdf
    • https://foodphotoshop.com/userfiles/files/11009965936.pdf
    • https://goodnest.info/tctt/sites/aaa/file/31872459132.pdf
    • http://taiwanquinoafamily.com/shopadmin/upload/files/16242321837.pdf
    • https://heatingboiler.ca/fck_upload/file/masikogomogodekafo.pdf
    • http://marcobernini.it/userfiles/files/xorolofunonaxal.pdf
    • https://stallion-international.com/userfiles/file/jemuxowemoj.pdf
    • http://contrast.no/ckfinder/userfiles/files/lepam.pdf
    • http://qishuochem.com/siicea/userfiles/file/pozek.pdf
    • https://maviet.vn/upload/files/66017355577.pdf
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/bakanenebajosepogofobuf.pdf
    • https://centrehistoriquesndbc.com/ckfinder/userfiles/files/84403156314.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113b5.bin
3f6dc12e4422151b4b6c098259580b02ad5c80126b6e08cfc70f1d38aa8f5af5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113B5 18080 bytes
font_01_sfnt_off000141dc.bin
cff84cc002e87d1428f825ee1a4a9a42e3c2b5023e0695cb1940f6204ce91539		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141DC 10920 bytes
font_02_sfnt_off00015b4e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B4E 16792 bytes

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