Malicious PDF — malware analysis report

Static analysis result for SHA-256 d644df391fbfb684…

MALICIOUS

PDF

51.2 KB Created: 2021-06-20 19:54:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: bea1ae90a92400635d464585591baedd SHA-1: 313aee27357c9c98370243bd78ef6af2fe4e97d0 SHA-256: d644df391fbfb684ecb796fbf8f9f62cc21fbe253947b96e807c9ab4d0fb6c80
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs that form a link farm, with several pointing to compromised WordPress upload directories and disposable hosting. The primary purpose appears to be redirecting users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7338

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://am-assets.com/aom/magnolia/userfiles/file/75652894560.pdf In PDF document text
    • http://a-swiss.com/upload/userfiles/file/33896908007.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16083d314a9ecc---rezagoxepiduridijini.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc92faf626---71991712438.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/32685806037.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b9902b3d273---kavaboruxonuxat.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/u8ni764a3li1gpnd5tpgesca9t/kikelurejakupokemuf.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160925f3ab9d23---16122267144.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/41926430081.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/0212cb2cb41ef442dae2a74d7c2d81ae/tibozatolamafel.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/finakabavuwugeja.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/19096bc89d4f0078d99488ddeff843cf/23227531340.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/srrfjkm9ksghjkl8pcaalbrvou/mivinafukeluxadonemeku.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609456714e7e3---72280411273.pdfIn PDF document text
    • http://grafichesirio.com/userfiles/files/73613402743.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/2190197eff210fc3c79502772891cfbc/bilidugerudotalexijulav.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/4475dbb429595cd0c0608d03ceb6ba32/zedobimawulokuxi.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607098aef05f0---ritigopirilomobaxaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=the+notebook+of+doom+pdfPDF link annotation

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