Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f56accf04768b6b…

MALICIOUS

PDF

95.6 KB Created: 2021-06-29 00:13:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 3c5ac72fe7fd572d861d232c26d3a883 SHA-1: 687ae4d20ade8c1c71df3ea810b94b7f20e52ff1 SHA-256: 2f56accf04768b6bb71b9a1e050741bb29ae2ec27dd438aa9953720e2da5f7fd
156 Risk Score

Malware Insights

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

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution lure. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates these links are likely part of a link farm hosted on disposable infrastructure, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://medvor.ru/uplcv?utm_term=noah+and+the+last+days+movie PDF link annotation
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b349aaf068f---lumetidozufarenixulap.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b915327abb---73570579452.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/fukobanofexibisux.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607984a477cdf---lepanukajifupaviliba.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160803d85b3f51---kizemela.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/bk1aa06k3jn6ahjndrbkhon182/rupuvekisifix.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/115e5478d2b0492b7f1e593dd31a4d95/sijenanopoluf.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bd962e7facb---buzakeniwuxagozupavalifub.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/88341339e33218fe4843b7c54fd12abc/55145691505.pdfIn PDF document text
    • https://przyklejki.pl/userfiles/jopibidojewagix.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b7528d2fd---jimodezugatexivefuge.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/67550499608.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a1988214d---wupuwijipexikajumu.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071bafa27277---levej.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/80084218949.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc9c347bec9---dulesevexilumasubugi.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/31a8b39f8c519ee15e5242bf595ff402/ninotezejokisazut.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a153f67e36d---selezaragiminagal.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/ea7l7sa3ajd6jk11lq2756g01e/32561789915.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/4b0d6r4c3ejrq7936jo0h6j6uq/kokobin.pdfIn PDF document text
    • http://arslanemlak.com/E/file/10770334805.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863f8bf06ee---72563999025.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/952709dce5af62edded6246139cdbf97/jabuvatufoxe.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_off000112f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B0A 10572 bytes
SHA-256: e205419bba0dc18a296e3da70f96c73ef76da9eaffab2e7be762ccf6432f11d8
font_02_sfnt_off000142fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142FA 17656 bytes
SHA-256: ff5b75013d53cbdaec364c598e7d872dfd3cd0b41fcf40e83e93c83ae6db0ed5

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