Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc42759b17b740c8…

MALICIOUS

PDF

141.7 KB Created: 2021-01-15 15:45:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 037c8857614b5f0214e88002d9848a41 SHA-1: 6c1ec7cbfeea8252cfc48df5718a09ce28ecb78f SHA-256: dc42759b17b740c8680b93f2f39fa3989fc73abaf492412d5b54ef436c70c85e
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation scheme. The presence of these links, combined with the PDF structure, points towards an attempt to lure users to potentially malicious content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafftec.ru/aws?utm_term=forget+your+troubles+line+dance+stepsheet PDF link annotation
    • https://gitinegu.weebly.com/uploads/1/3/4/6/134648864/9750801.pdfIn PDF document text
    • https://bogemokized.weebly.com/uploads/1/3/4/3/134386998/zutelaw.pdfIn PDF document text
    • https://voxapinave.weebly.com/uploads/1/3/2/7/132740917/nukutasonob.pdfIn PDF document text
    • https://site-1243298.mozfiles.com/files/1243298/rizekedatez.pdfIn PDF document text
    • https://site-1201991.mozfiles.com/files/1201991/26390267814.pdfIn PDF document text
    • https://site-1166617.mozfiles.com/files/1166617/tribal_rites_boulder.pdfIn PDF document text
    • https://site-1173509.mozfiles.com/files/1173509/33735939531.pdfIn PDF document text
    • https://site-1166042.mozfiles.com/files/1166042/bendix_brake_catalogue.pdfIn PDF document text
    • https://site-1166704.mozfiles.com/files/1166704/idea_mobile_recharge_offers_online.pdfIn PDF document text
    • https://site-1168267.mozfiles.com/files/1168267/nonilixewo.pdfIn PDF document text
    • https://wudusalulolatus.weebly.com/uploads/1/3/1/6/131606476/tajagotinigu.pdfIn PDF document text
    • https://jepirozo.weebly.com/uploads/1/3/4/4/134474462/ziripoxeditefa-seritir-favofedusigi.pdfIn PDF document text
    • https://site-1172287.mozfiles.com/files/1172287/noponodakuxule.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/verbal_ability_for_gate.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ee74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EE74 5532 bytes
SHA-256: 86663e25a2b52f6f5488ea35b42668a69ee2f333695adf8cf8506441545908ad
font_01_sfnt_off00020141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20141 13240 bytes
SHA-256: f7838ac00a88e4f450d41d66c357b27c7b11b3dbcd2f5daf89e7845b7e04d029

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