Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0581324fa43c473…

MALICIOUS

PDF

70.3 KB Created: 2021-08-02 02:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a66118b2d385e2e0c1bb768b50be504c SHA-1: 87b7ee24ae166a673655eb0d6c8a0fa03a61ca48 SHA-256: d0581324fa43c473a38d89e3c70822336e05a1b34f1fa4ca361bbb4d43978d49
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, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to multiple compromised WordPress upload directories and disposable hosting sites. The primary purpose appears to be directing users to potentially harmful external content, likely as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8022

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://cabinet-blin.fr/ressource/site-image/files/96786399645.pdf In PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/f73c047b6a16913f956dbb499da9f12e/dawonuzegemuwapepoka.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074740b3dae8---dotojagepuvetif.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/mukidiwulobisepakanimoti.pdfIn PDF document text
    • http://miamiokclassof65.com/clients/d/db/dbefc63a503cf3d3a4f9fb61678ecc08/File/83614601198.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/tlekc76angbgp56vp53cngjhl5/62003877792.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609b287d365a1---nedenapigifozowe.pdfIn PDF document text
    • http://cymrozgreatdanes.com/clients/1/1a/1a407d8ccac5525c71aaafb6b4664123/File/99073798446.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/sejezonatuzipitijejir.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bc6ba9168d1---90209480505.pdfIn PDF document text
    • https://mimpisiluman.com/contents//files/nuresesatuzomuf.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021061105065773499.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/djkmc46g38o7g5hljoujtbftfk/62795747915.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/7352b02b61c77e8f36d594a09d087ee7/1011071789.pdfIn PDF document text
    • https://pianoinprimopianofestival.com/uploads/file/7922329919.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160f967d529ab6---15461954910.pdfIn PDF document text
    • http://szrealty.net/uploadpic/2021-5/file/2021051520333473499.pdfIn PDF document text
    • http://fairmonteast1978.com/clients/71195/File/bawafaxajikalozelolu.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160869c439e6ec---gisesomusotogedenivopus.pdfIn PDF document text
    • http://loaamtran.com/files/usersfiles/files/10144040203.pdfIn PDF document text
    • http://3e-recycling.ru/app/webroot/filesfiles/92388069761.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=what+is+umalusi+subject+certificatePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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