Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d974a08c63b4287…

MALICIOUS

PDF

66.6 KB Created: 2021-04-29 18:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec92e93c3c5d560e4f688017b0635191 SHA-1: af4bd4b53dabea1bb9828da1997842207b24f36b SHA-256: 3d974a08c63b42870072befc2345c44483732b88684d1b45d09629f13f932a53
174 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to host and distribute malicious files. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classification also flagged it as malicious. The presence of multiple PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports the conclusion that this document is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8600

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606cca0b8e76b---zinalenedojoli.pdf
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/cddf884084086cffd4921169e2a25c9d/9968227165.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087621879da9---68483391569.pdf
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/7fc0939a597872b9d439449f5c77d43d/99876628849.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a931d95cdf---69314120861.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef1f73e579---5662865214.pdf
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/0f0fe61e344229a7a4e6e62d989db2d7/51615013546.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/f328028c8381c0365d80dda1e7494d59/puwobebinokapewaxevenedu.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/33c4a9e0203843700ea5738979502646/77542221729.pdf
    • https://studio-september.com/wp-content/plugins/super-forms/uploads/php/files/2e088c456c9885edab5117732f6418e7/banaverowuxevufo.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/q24bekdpvtdcbntmog3ll51qn6/nuseligitoxobafikim.pdf
    • https://www.erenang.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084aa7582440---balijafupijedizeb.pdf
    • http://airholic.com/UpFiles/WebEditorFiles/file/gogogujogatuv.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/31fe58217d08eb55886529a2d039eb90/26448071402.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad5348fd79---selofogaz.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcb45a284f---45052815262.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855bb872ede---dijolijaninajazi.pdf
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/d66b08c9fb462dd66b5b595889c3a7d1/20236103151.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=android+adb+fastboot+linux
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc37.bin
b8db44ea90d1ade676b9f5135a9f218d117c12c2e14329cb4d13899429be9175		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC37 5100 bytes

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