Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3e3215034397af6…

MALICIOUS

PDF

84.0 KB Created: 2021-05-15 14:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e38f6a06aefc2c019f7ea079bf6d0f5b SHA-1: f21a5fe80fe1434ff7c835be696f41cc2d541686 SHA-256: f3e3215034397af60f18a877844d7e243acc7a6864ae29754390b0aa0e7e3eb0
154 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage, suggesting it is used to distribute malicious content. The document body is heavily obfuscated, but the presence of external URIs and link farms indicates an attempt to redirect the user to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9534

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://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868db2cd323---vogoludamedizak.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/b23e8306328b02d7f025d16f1194463e/21114123967.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/54813d78fb0af0fe084d9fd300925a5a/12215554174.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/tsl2ogom4jvb1b604kdkq92urq/xikumafivuj.pdf
    • https://hiampelectric.com/wp-content/plugins/super-forms/uploads/php/files/05151cceea7eead8ed6211942be7aa74/8766757009.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/1dad7349ba0612b785d1ea9e1fe39715/vavep.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/7db06147e0e7f65d76d614a3aca0a3d5/razogitaduzopajuvoga.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16085c27829773---nijubawola.pdf
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/9d152391552a3ea57bb084acc033417c/20609484883.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/6730d8edf62ab8df12e7b56675c45c4a/12758747706.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16076369d1b54f---wozupuguxevatopu.pdf
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/c920b89c324e48d0ab8b1847b8d6a04f/1727555241.pdf
    • http://altinay-law.com/images/file/12010222119.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d200bc1314---52379032832.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/044d8779fa4b44305f5978581e17669c/86784861318.pdf
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/f1ef2ced4c6ca44a0b57c2834ec766a4/pabesexemezadepovibujetow.pdf
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/66079376c9766d583cc4fc1207cd0c99/72850460707.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=metformin+use+without+pcos
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000122db.bin
b20e36956c5db2f5ed4dac00df76f51f580cde25e121499aa6f267bd22a4d374		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122DB 5112 bytes

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