Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd0cab435d8ee9b6…

MALICIOUS

PDF

75.3 KB Created: 2021-06-30 00:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c6932fcd427d83959043a871cbcffe54 SHA-1: bf887790b64e330afeecd838ed07ac3914fb00e5 SHA-256: bd0cab435d8ee9b6650d20cae3460bc274e0a55e41641476da961acac7c00369
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. The document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm designed to obscure the true destination. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs suggest it is designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/b127248f1bbacf29980dc6f6a9033136/9573144289.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/3ovvotskojaqcvj3cl8nt2onme/ketatowevadozineg.pdf
    • https://aduanaldelvalle.com/userfiles/file/80370234856.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8d55a136b---pumirolofezone.pdf
    • http://anhbanglaw.com/userfiles/file/fujimuw.pdf
    • http://helderlive.nl/ckfinder/userfiles/files/zewud.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/715ea27d742ab019f7a0ac04aba7512a/19463361845.pdf
    • https://ascinfratech.com/clientprojects/trading/file/zejeposorojimuzul.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/e76439b8d903e819fcdadc4b54b99ba4/12444803077.pdf
    • https://lncl.org/ckfinder/userfiles/files/67510216884.pdf
    • https://hpsoft.shop/upload/files/6464700087.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ae56e8cfa---fepaladelonurovijor.pdf
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/15986605839.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608baf2dcc9f4---14356901529.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a3182b61695---87631376863.pdf
    • http://www.manorbymajor.com/userfiles/files/jowitix.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c330e87067a---46978071093.pdf
    • https://stiff.pl/ckfinder/userfiles/files/bobegejofebi.pdf
    • https://heatingboiler.ca/fck_upload/file/99588460150.pdf
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c3845969129---72186961829.pdf
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16074c72d33fc5---92732562953.pdf
    • http://mhspartan79.com/clients/9/97/97d0d0788ec4d6723ba7be3cd58769e3/File/31190477512.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b71046ed41---zolozi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=science+20+textbook+answers
    • 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_off0000c38a.bin
ff0b0035b517d8ad8fa92ad3bc5a759cf10337e1905d7735f84604755a833072
pdf-font-stream PDF embedded font (sfnt) at offset 0xC38A 10916 bytes
font_01_sfnt_off0000dd13.bin
503c66852d455c4ac6d7d285f1223979bbe934e6190ee5a0acc5da33975ec379
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD13 16552 bytes
font_02_sfnt_off000107f8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x107F8 16792 bytes