Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fef5b5bcde5c9be…

MALICIOUS

PDF

58.7 KB Created: 2020-11-14 06:59:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ea80779773045f766d696bbd353b2931 SHA-1: e5445b661179575fd5918e730b4d35d942b5db5b SHA-256: 0fef5b5bcde5c9bee922a25be3a85d77f241c40ea2e03e6d864a4a47173cc335
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/strik?utm_term=life+below+zero+torrent'. This URL is likely used to deliver a malicious payload or phish for credentials. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to 'torrent' and 'wkhtmltopdf', suggesting a lure for potentially unwanted software or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/strik?utm_term=life+below+zero+torrent In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5f932cbcef5fc.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/vaxebisapesi/tamesetizulexivuk.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/35625909228.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/mazuvavatad.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/rainy_night_in_soho.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/79014132948.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/33930870899.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/anger_management_therapy_techniques.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/41627815821.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/guriji.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/98743056559.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/auditing_and_assurance_services_alvin_arens.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/wosimizigisatufep.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_off0000ab91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB91 4596 bytes
SHA-256: a2d7e0b616b8ba0e69dd10f8fbf0c1ca2f9361cb37fb21a73cc0051e3ae9e010
font_01_sfnt_off0000bb64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB64 10128 bytes
SHA-256: f8f64dd005660c51c2b218c4c727ca75c90527c52b833ca9fe6fa10145c5169d

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