Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc9485b93a914c16…

MALICIOUS

PDF

105.3 KB Created: 2021-07-15 10:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: af30c7aff2506e58ecdb0fccbf1124d3 SHA-1: baf06fab7da01883c05f634995b6bdba2fa61a07 SHA-256: bc9485b93a914c1661acf67a693f8526eb5f4e50dc31c487048a229fd923a34c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites. Heuristics indicate this is a link farm designed to direct users to external resources. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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://synerhu.ru/uplcv?utm_term=french+medieval+names+female PDF link annotation
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f77f00b35---fuwagadarobafapone.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/jl7sispdtoh7t254elk54q6n3h/lozevapapepufexevijo.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a87bad619d---nigozasuziz.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a50e3b5e24e---44774047604.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/96096610204.pdfIn PDF document text
    • https://sabagdasarov.ru/upload/file/dozodasu.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/68ea8824d44ff9135f8e313a87212b21/riludujaw.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/e3e0ab746db1aa5f57add3dd9a6bbe1a/bezigav.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/e08cc72eaec01a89e8fbeff6f0de57a0/71725084832.pdfIn PDF document text
    • https://biocoils.com/img/file/kosabanivu.pdfIn PDF document text
    • http://ldbell1965.net/clients/85689/File/zilunabatono.pdfIn PDF document text
    • http://forglass.sk/userfiles/file/55518839115.pdfIn PDF document text
    • http://3colorjazz.com/fckeditor/userfiles/image/29295695821.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/67764848817.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db179ea1a29---wokizasobobejewurevimav.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/64413017834.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/8n8fuajh3ap483a553ul36r9gc/kunijuzixiwik.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b660ebcc05b---butin.pdfIn PDF document text
    • http://mega.kz/media/upload/files/pifidijazefizape.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16076c3ed73d3c---pelir.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/b7c117e3b17c24a73a52f7d695d2d337/givodaje.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b95846c3fd---48078181184.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086759b6b1ee---kowefekojipabij.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/75300ec5864825548a15bc70c6061a80/bikipapimezepege.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_off00013683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13683 10568 bytes
SHA-256: fadcae44334478dbd136ce291d8592be42bd5acce91223364385389667413727
font_01_sfnt_off00014e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E50 18936 bytes
SHA-256: a7b1f8ad04445ad27cf6c41834efba06c327bebf9e974650d7941420a86e8963
font_02_sfnt_off00017f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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