Malicious PDF — malware analysis report

Static analysis result for SHA-256 40cd4f8f526582b9…

MALICIOUS

PDF

59.9 KB Created: 2021-05-01 22:25:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f671696a8f9e086642db34ac5f8fa44 SHA-1: fcf4ae9057eea8b4a83d6d0f6e3d036d5c87e334 SHA-256: 40cd4f8f526582b9c39b564635d77e51194f9c3ad1eb857f541d617f6cf5eb22
154 Risk Score

Malware Insights

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

The PDF file is detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous links to compromised WordPress sites, suggesting it's part of a link farm designed to distribute further malicious content. The document body, though heavily obfuscated, contains references to 'Cardiff council tax benefit form', indicating a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6956

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 https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3fd91c7ce---35877247115.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb7059b7ae---kisevajilibudumavilebari.pdf
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/7e0365da4c33a7b10d4c242e165eae4e/57870308629.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f20b82240---giwirufuxorozariwala.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081795cdd7d0---60824473391.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/fb14648efbcbb7081787165b9bfd8d05/fadunas.pdf
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607291e70299d---xakivakaminaponedebos.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2ff15a8e4---70479789910.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160728ff9d66db---79748220029.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f434aee5e1---sujol.pdf
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/abc278ba464dcf9d698f8b3e4f1e4766/1763237538.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ee9b53fae---19572839112.pdf
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607884f331ab5---sadabiw.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16078e486b7300---pesemefaxefogirejum.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1607573fc58cf7---wopixezimo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=cardiff+council+tax+benefit+form

Open this report in the interactive analyzer, or submit your own file for analysis.