Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dc127c391c05a5f…

MALICIOUS

PDF

62.3 KB Created: 2021-05-23 01:14:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aba39d3b48baed245a07fa3ad5d57a01 SHA-1: 343a5f8e5d2915d66fa9ceb3a674f25e5b16eabe SHA-256: 2dc127c391c05a5ffaf1b3c66e433f7eeb8bdd998ee55abf921bb4863e4f11ea
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, suggesting an attempt to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded URLs and heuristic firings point to a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7598

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://asdgolfclubtoscana.com/writable/public/userfiles/file/vujefuduluw.pdf
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607564292c429---77096021104.pdf
    • https://aashianarealty.com/file/wugenokobujidiwajulexar.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/16091027e72d61---57484632010.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a857bb84e8a---26570431724.pdf
    • http://alhouti.com/userfiles/file/finibapexarutetozuzesiba.pdf
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/cad7d6a8d829b83ae14eec6467887c4b/dexoriwubojebotalaru.pdf
    • http://diclenakliyat.com/userfiles/file/pisetiviputimufigusowaz.pdf
    • http://beiks.info/public/file/bazaxisevebujuribi.pdf
    • https://karinbentum.nl/uploads/file/66316665318.pdf
    • http://gagutp.com/sa_upload/userfiles/file/20210523060056.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/fk2jcantos8d7adteuff89hotq/23928413505.pdf
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/521bcf5832f5e0edcfbfbc3503ac1c08/fitoro.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=how+often+are+kohl%2527s+employees+paid
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d293.bin
e2255a88299636108b62a41d087bd0ac75c55d39814020eb258581ec1951bc91
pdf-font-stream PDF embedded font (sfnt) at offset 0xD293 5532 bytes