Malicious PDF — malware analysis report

Static analysis result for SHA-256 e97222e6b594cbf7…

MALICIOUS

PDF

111.3 KB Created: 2021-09-11 08:55:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c8dafa0691ac4fcd428afe8e8cc3bf42 SHA-1: 921deeafde88cc98b9e98ef5529b1e413c03c1b6 SHA-256: e97222e6b594cbf7b06a6eeabde972f691db52a6524fe3b43008967b83879b28
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm and employs an advance-fee scam lure, likely attempting to trick users into believing they have won a prize or are due a parcel, requiring a fee for delivery. The embedded URLs suggest it may download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/uplcv?utm_term=warhammer+40k+core+book+pdf
    • https://perfecthospitals.com/ckfinder/userfiles/files/lobef.pdf
    • http://synagoge-stommeln.de/ckfinder/userfiles/files/fuxodagamuta.pdf
    • http://kiddeefire.com/media/userfiles/files/venapajezefibelopal.pdf
    • http://tehpromyar.ru/media/file/gitofaredar.pdf
    • https://vhcvietnam.vn/ckeditor/images/files/80053208355.pdf
    • http://bjsixiang.com/jingkelun/userfiles/files/20210904000033.pdf
    • http://mamaskitchenorder.com/uploads/files/kasinirafuvibujip.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16135fa760cc42---livubupejolegataxaboruwa.pdf
    • http://www.anieliasfx.com/uploads/textareas/file/18370824850.pdf
    • http://zatexpress.com/upload/userfiles/files/tegudu.pdf
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/dejuxeboremewupigagupive.pdf
    • http://secoinblock.com/upload/files/ranaturox.pdf
    • http://kolesnikov.pro/ckfinder/userfiles/files/24192812501.pdf
    • https://postelezmasivu-praha.cz/ckfinder/userfiles/files/73782298907.pdf
    • http://engineersclasses4competition.com/files/others/37420236476.pdf
    • https://showdetango.com/bafa/userfiles/file/fudezorikisiribuzu.pdf
    • http://www.diplomat2014.ru/ckfinder/userfiles/files/sajezedasewo.pdf
    • http://nomayaku.com/userfiles/file/58718459775.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/161391c2cd0697---ganolabirozomigeteri.pdf
    • http://abogadosaguilar.com/ckfinder/userfiles/files/jalegefirobaw.pdf
    • http://www.niziointerior.pl/upload/file/kigirivodotebex.pdf
    • http://tmkb.org.tr/ckfinder/userfiles/files/69465847197.pdf
    • http://revucue.com/ckfinder/userfiles/files/gitejosefapamotuxuma.pdf
    • https://www.db-ynox.fr/ckfinder/userfiles/files/58024053871.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/87d737031f0c9ff4d782eca6b92a742e/95134965781.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_off0001473c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1473C 16792 bytes
font_01_sfnt_off00015f4e.bin
0e20b2a75e2d23518b5f17fcae22e21d87f8468b19c1d898f08bdb61b26da4be
pdf-font-stream PDF embedded font (sfnt) at offset 0x15F4E 21588 bytes
font_02_sfnt_off000196c2.bin
22cac2f05bc4e48ad4291d179858bad48e46f3722ff5730c8e9a3f25d98de142
pdf-font-stream PDF embedded font (sfnt) at offset 0x196C2 10800 bytes