Malicious PDF — malware analysis report

Static analysis result for SHA-256 e91c96771bf1d164…

MALICIOUS

PDF

93.2 KB Created: 2021-06-28 15:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a40c466a8f977b18dbb1f868464736ce SHA-1: 14888aed543d90251bdf576501856a0c1e8b57af SHA-256: e91c96771bf1d164bcaa541e6f4d27e5529842c35fccb536702371600ae6b02d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://synerhu.ru/uplcv?utm_term=silver+prices+for+the+day PDF link annotation
    • https://psychologgia.pl/Upload/file/29680778206.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b26ff249561---98347502600.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/4d5c5e5a28f9fbe8835b75ad625e71ca/lijotepikip.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079199772d66---jatopotigenezinuredobizu.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/joligi.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073ee9f672b7---xilef.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/4634d0a63e44744822ce18d40230845b/72266635364.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/46916773197000db16f1f8a02bdf28d5/82360471097.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9d38d47f5b---latefamevetipevoxejag.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160793b587185e---97739654652.pdfIn PDF document text
    • http://bmsorganica.com/userfiles/file/wiropis.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/0319e38048ffd3aad12ee3db70f3c354/fobad.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/2ae47e19beeed95caf6810c0f367594f/gaputexusu.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/zotoborofinavalijo.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775a7c0f142---tusejunipovu.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/3lb55tr72o4gigl4m1c7nslrkp/pewitasipakojawuwenir.pdfIn PDF document text
    • https://pelletier-tp.fr/ckfinder/userfiles/files/91003661949.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/18o7bdc4s5munmnous3ijqgkeg/49931537323.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/d7ccf908343835e1df692020d39f4a88/98996197557.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/bb7e2eaef9dbc62ec43a7fbda81c93eb/meviwusizurikadegupowixu.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/wepisamasagezag.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/dalimuzagoreza.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000120d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D0 10868 bytes
SHA-256: adaeed8f8dc2ea05a738de765c5dfb09455f5ad739c7b12dbb488d8fbeb88b86
font_02_sfnt_off00013a07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A07 17852 bytes
SHA-256: 2cebff70a81e46141fc032155e7b28df4291c0f1bd1393acaf3238dcd28f7aa7

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