Malicious PDF — malware analysis report

Static analysis result for SHA-256 d446e5a22f684552…

MALICIOUS

PDF

74.6 KB Created: 2020-11-19 08:40:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c08f51ca76b231f7beefd9dd1d53c008 SHA-1: 5fff8496a72b6a9f8fb45bedf6d060efffcf9b68 SHA-256: d446e5a22f6845524e298217d144c9b98e114e4165602954535bc6cb413c4781
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, with one prominent URL pointing to 'trafftec.ru'. The document body is heavily obfuscated, but the presence of numerous external links suggests a link farm or redirection mechanism, likely intended to lead users to malicious content or phishing sites. No scripts were extracted, but the PDF structure and URL findings indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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/strik?utm_term=jamberry+instructions+printable PDF link annotation
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/kotaxujodinepe.pdfIn PDF document text
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/5351011.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b03a58d-865e-43ed-9b7c-7284c97d1cb0/65898825343.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/2670615678.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d5d5164-1857-4b09-8be9-b20fc38931f4/89239717449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/385b04fc-526e-4fcc-8322-83916c2c1764/88142656975.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/fofadijome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/571c4b57-032e-4bd9-98d2-af53fb6fad0d/44080260384.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/moseneludijaremixilojibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44c7598c-6b0f-4fab-8738-ec5ae3d10903/vibigiruzobuvaleb.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/cessna_150k_maintenance_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/anasarca_treatment.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
    • 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_off0000d030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD030 5308 bytes
SHA-256: 48d9aaff66ca8582df3270f8e447529d12185d46228a30c80f72745566c83044
font_01_sfnt_off0000e22e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22E 10548 bytes
SHA-256: 59086dc28cc062f39f1bb3691fe69a212dbb96e5be30940c610074010c1ebbbd
font_02_sfnt_off00010680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10680 16136 bytes
SHA-256: 5edcb8680580f0dffd27d5374d46e48d76cc671b7c405e6d8fcbd2dfcce56931

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