Malicious PDF — malware analysis report

Static analysis result for SHA-256 74dfc7cb8acf2b9b…

MALICIOUS

PDF

72.1 KB Created: 2021-03-18 05:24:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ce9ca97a6baeaa939145bedade6d1bf4 SHA-1: 51592b9f4dfa762afdc1e70c4985880e2724591b SHA-256: 74dfc7cb8acf2b9b13430e504fdd7f7f3350de89df964833382a84e513c03d88
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to a suspicious domain, suggesting it's used to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is part of a link farm designed for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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://bologen.ru/wix?keyword=jugar+last+line+of+defense+hacked PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366003/normal_5fc7e52a513ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392220/normal_5fe7a9b627390.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383928/normal_5fd68aad6bd62.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466151/normal_5fed147ce34ee.pdfIn PDF document text
    • http://thiswaytovogue.com/wulevaneloty95x.pdfIn PDF document text
    • https://cdn.sqhk.co/paxofipixag/e2jd8gj/zijunoboxuso.pdfIn PDF document text
    • https://cdn.sqhk.co/sewuvavimebi/zheWjjR/35336304613.pdfIn PDF document text
    • https://cdn.sqhk.co/tokejosanawo/icgeDhg/business_and_professional_tourism_meaning.pdfIn PDF document text
    • http://titanovyi-filtr.ru/wavelength_formula_unitshm07z.pdfIn PDF document text
    • http://lonotel.mygamesonline.org/8213789047.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/xigmWgj/zupokazetuwusulezasezo.pdfIn PDF document text
    • http://teenagetutor.net/77503639168zuci0.pdfIn PDF document text
    • http://wacc-cat.org/3430558762471bnd.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvuvidova/igjbdKK/8244664096.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466140/normal_6024623f9c5ab.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/gekixadonuru/65478105838.pdfIn PDF document text
    • http://baxewape.myartsonline.com/cephalgia_kronik.pdfIn PDF document text
    • http://wuragumok.atwebpages.com/rolemisoz.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/kowijoxibuset.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/char_broil_quantum_grill_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/fractions_practice_worksheets_6th_grade.pdfIn PDF document text
    • http://megigezorozo.atwebpages.com/2945761085.pdfIn PDF document text
    • http://nijarigu.onlinewebshop.net/8848412041.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/nyc_bike_path_map.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_off0000dab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB0 5336 bytes
SHA-256: 54404a914023fb542c5dd4d6c73a33aeddb34fd96bbe0cbd6f3253c11768e8c3
font_01_sfnt_off0000ecd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD6 11560 bytes
SHA-256: ddd20540941ce80f7933d90959abad0ef570ba49fe9793db4135ff1b9468a20d

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