Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f3fa198ff8f4760…

MALICIOUS

PDF

55.8 KB Created: 2021-05-27 03:17:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fd02595a859fc99dd5242a8a0d3d77a SHA-1: a23a292e6154d774f4402b8eca8488b825c0c9b3 SHA-256: 9f3fa198ff8f47607f8d2883e58926cc1c219e8a8e36392038f9f27c652c885f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. The presence of 'utm_term' parameters suggests an attempt to track user engagement with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9630

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://irlanc.ru/uplcv?utm_term=maestria+del+amor+pdf+gratis
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160878532d4dc7---12732812871.pdf
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/16086f566a25af---78572021661.pdf
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/5242b5a586ab5754ce45a44900c0b05a/zakeno.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6724147b38---periwamujotow.pdf
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16074a8c15059e---pufelurozomubudazezowiru.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16073568b8c1db---sokomojab.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffc2c9ccb2---63459121659.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/2gik594272bio8umit5c397qku/nagopubonomubopalozobujoz.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1608102e7f042d---vogemesevinapeponibimaw.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/977b8676c3bc21703eb8e250d2cee9b8/kimilefomed.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16089c693e97d4---pinusijotijibetanitarejir.pdf
    • http://meble-tk.pl/userfiles/file/selavajipinawusaji.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f34994c5a2---20192192737.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608605318f656---ribazetopekadak.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/923c674fc7a52cd7d11f0103d7f9948e/jisafujevekomadagizibu.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca11.bin
1867e47df646a2285ecd7f5595d86c48699595e31fa741cd285439a3378bb9a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA11 5364 bytes

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