Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9467a7306c96c8c…

MALICIOUS

PDF

73.4 KB Created: 2020-11-25 21:46:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e3c7ac7afd82b4f1ca8827115643d72f SHA-1: eadce957b6c810396a30239b5f40a0daf370d33a SHA-256: c9467a7306c96c8cefcbff8eb38aa968d7e176da48bda36d7eb7ab823d518714
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of embedded links, many pointing to disposable domains and potentially malicious redirectors, suggesting a link farm or phishing lure. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • 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://traffking.ru/strik?utm_term=sidim+cayey+2020+uprising In PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/cfccb3.pdfIn PDF document text
    • https://kanudepu.weebly.com/uploads/1/3/2/7/132740929/luvavu-zanelaxetobovug.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/2148305.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/wusolewojoj.pdfIn PDF document text
    • https://kazajibabagak.weebly.com/uploads/1/3/4/4/134467412/dusowon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369152/normal_5f934ae855306.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f8d6dfbd6892.pdfIn PDF document text
    • https://devuzagobeli.weebly.com/uploads/1/3/4/4/134431767/dujadejupis-jogowexogax-lixevazezemox-fopigedi.pdfIn PDF document text
    • https://gebulofafilo.weebly.com/uploads/1/3/4/7/134717894/7558820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384308/normal_5fa7c29694ac0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383138/normal_5f9a07563b69d.pdfIn PDF document text
    • https://lagafuxomip.weebly.com/uploads/1/3/4/3/134347440/pinun_vateponoda_xuliviwufuxofob_dogapedet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414873/normal_5fbd8d995a20d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378170/normal_5fb987aa5bb65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501201/normal_5fb5f4a54ba90.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nitirew/57190619721.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25D 5532 bytes
SHA-256: 60b2a6673bafbd2d11c28baa466072b7345b2bb06be5caaebbd788803ff3518a
font_01_sfnt_off0000e4fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FE 11236 bytes
SHA-256: 8d0e45e48cf46c4eba2c66f1df22e2e564d26b9c5b74988dd409a8a62a58a60b
font_02_sfnt_off00010a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A85 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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