Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d20beed7db974f…

MALICIOUS

PDF

54.4 KB Created: 2021-08-09 22:03:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dd1ec573b8a97c64662f2c9a7e1ba2b9 SHA-1: d36486dec5de5126e3dd36711df758fd05e16d72 SHA-256: 47d20beed7db974f3221c91123f73549dad9f13d4d1c03ccc80ef5c05b2a4482
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV heuristic strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8410

Heuristics 5

  • 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
  • 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 http://choinka4x4.org/cms/files/file/xujudinebofo.pdf
    • https://et-auditing.com/userfiles/files/71355880908.pdf
    • http://sys-svinding.dk/userfiles/file/43696285528.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/83634e99052efb55ed3e30fc92548aea/bumadek.pdf
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/2uaot6rupermqk74o2in7l9mm4/3662198459.pdf
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/91471609218.pdf
    • http://vejwun.cz/images/birur.pdf
    • http://billedbutikken.dk/articlefiles/file/gawesiwexezowemezafuta.pdf
    • http://clingac.es/d/files/zefotebuvimabogobu.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/c2b99aab574180e115fe0dfb46c1d430/xobalatalosomaz.pdf
    • http://elmbbq.com/uploads/files/71363736730.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/ll8p46nikffrn01vg8quqspms6/dusisogu.pdf
    • http://alvitraders.com/files/mibezusa.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/bf69c6e1f35c6be504348b38fa749d20/7345620822.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/877c9d29ea9ebeacb401401f5978e91a/7722520710.pdf
    • https://jetaime-shop.com/files/32747166702.pdf
    • http://amandamaitland.com/images/file/86764512566.pdf
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/57966e409e36a853a64807d5a2aa9e19/gurusiwamepov.pdf
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/6680c60ae42e1d013e141454d561735e/3738253108.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3e9b5dc51---62216516467.pdf
    • http://tylincms.com/userfiles/files/171801283.pdf
    • https://jnvhardoi.org/ckfinder/userfiles/files/vogubesutajikoxiz.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/0def3272a30421518eba511eed4cfd32/69919881141.pdf
    • https://www.alapan.org/fckimages/file/rajexutesigezelegu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=bloons+tower+defense+5+hacked+google+sites

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