Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe24db0ad1fb736b…

MALICIOUS

PDF

63.7 KB Created: 2021-05-01 16:34:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7e8144bbb539332f88f4028936cbf41 SHA-1: 95fd1334ff81fcc64769380b99396d647444cc72 SHA-256: fe24db0ad1fb736b3797f826e65bdf2566dd0561c07673b17a060a0203e5d5b5
154 Risk Score

Malware Insights

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

The PDF was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly suggest an attempt to lure users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8602

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://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b1978ba57---xolajilapaxelegedulukatum.pdf
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/9bfd2554da28fbf3a95dbc1f3b6b96a1/7156668718.pdf
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/3c431741ffd1ee88fe533fae0444fd23/renep.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb7bcd89a7---nisonelenidodumoziwanipaj.pdf
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608766a132c43---30487146228.pdf
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/d8a538a36b87462b9f7375eb0fe70873/84163009748.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/j6u5mpbf2h1h9e28i4ajv0rgpe/tevakezef.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/qbmfn9duss846ph2d157jot00f/23855995084.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad019b533c---zotivogozawasen.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606e1d01c467e---soworapelovanenuk.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/92913959d16ad848fb7b6c5bc5110be7/31998135215.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16076b0968234d---17681228545.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a222050e6d---vomagirixonagepotoxi.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f62cbdfb16---woweliden.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608996e1e42e8---tajawisexo.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3b64c11ce---51005629741.pdf
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/5b0uutcus9b7de19f7vph8qb8u/24493490614.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1439c93c2---86082249621.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab1b35d015---wavewoximuragatubonabu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=upsee+syllabus+pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e508.bin
ff9a2dd84570dc7703d8a61fa45e731dbefd5d70d53c7980abef48b362e97124		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE508 5172 bytes

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