Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7077a91ada047ad…

MALICIOUS

PDF

70.7 KB Created: 2021-05-07 02:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 352b67ac2499a2d9225a7a9d9cde0fb6 SHA-1: f109eae9fad5605259919565cdc7db2827523048 SHA-256: f7077a91ada047ad6878732cc94702ae46d95b5e915c37835839165ef4388e29
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites. These links likely serve as lures to direct users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8402

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://chcial.ru/uplcv?utm_term=auxiliary+view+engineering+drawing+pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d39bd5eb5a---donekasivuzulusozigetines.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/8asqp9mjs1mbtubddenrnn2uv7/69290496556.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/unv5ei7i0ehgkrpl7evf95q350/modorujadujolibolufixug.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef84a53a3b---84269021829.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca093711ef---purubeki.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/d119fcf5d681633ec71a0e58c4e92823/85470221862.pdf
    • https://www.leeja.co.uk/wp-content/plugins/super-forms/uploads/php/files/eebbf6890dc9ebb3f1c455a2d13bdd23/nupopotede.pdf
    • https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/c56ca1d780dd2f60452d237ee7e2ceb2/36040367931.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/j5fb0mbql8p582qp512ab2u404/kulojixijadufikak.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608459d8d9c0c---komijafonobe.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/1a5763f2db6f8dba915f1c03852c037d/nefato.pdf
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f4cfd9e6d---deguwabetarosudak.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9a8.bin
cc59b1b90e19d14d6e01f946caeda48a3add895f1a6793109d51d8072f961302		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A8 5340 bytes
font_01_sfnt_off0000fc08.bin
a1177946155fd211d6934325ba3d4a61e836ba357aeffc0507f684cec0d1f24e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC08 10776 bytes

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