Malicious PDF — malware analysis report

Static analysis result for SHA-256 91d59fa289376291…

MALICIOUS

PDF

72.2 KB Created: 2021-02-28 23:07:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: de61a1ac780324db6cb9fabc598e88df SHA-1: 705e1738fa3efa0a498316831aab0b0a4a4b65f5 SHA-256: 91d59fa28937629191a09f0fdfe199abcbd29d8272e294d7d73350ca9eab8649
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, identified as a link farm, suggesting a phishing or malicious redirection attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a spearphishing attachment designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9693

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://fokemale.ru/award?keyword=rent+agreement+cancellation+letter+format PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385026/normal_5fd98610e8a87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482648/normal_5fda47dfa9e19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408001/normal_5fec7634b84a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369794/normal_600ea5d0c9831.pdfIn PDF document text
    • https://zulasiromeg.weebly.com/uploads/1/3/1/4/131453934/1891652d.pdfIn PDF document text
    • https://gonuvogizup.weebly.com/uploads/1/3/1/8/131857562/16213.pdfIn PDF document text
    • http://malespw.xyz/xejopejuxexovsehy3.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/potamotaz/ditirivivekekorozivuk.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/39477689080.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/sport_mediaset_formazione_juve.pdfIn PDF document text
    • http://rusakarazixano.epizy.com/besujewabeguxezirexasuv.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/kazufujasewanolebamuf.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/cambridge_ielts_listening_test_7_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/surimufedafepak.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/tetebumobawekizewafux.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/91385556988.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/prevencion_del_cancer_de_estomago.pdfIn 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_off0000eb0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0C 5028 bytes
SHA-256: 34a925b58a18f9cb377a08da0891483b2d30320e5327017bd2a8b7d6caa43120
font_01_sfnt_off0000fc1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1E 10464 bytes
SHA-256: e1d17e86e1cf20908397fed2a80dfb2025c3f500089e0712a42dfe47ca8b7e04