Malicious PDF — malware analysis report

Static analysis result for SHA-256 3131508ed6d60cae…

MALICIOUS

PDF

69.6 KB Created: 2020-12-17 05:40:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d49413c14353723e34197a8b3bde7c4f SHA-1: b087062673b3b869e7bec5ed1c0f3dc52e71301a SHA-256: 3131508ed6d60caebbbcf2ff8e68f8c4880dcf75a93cc7ee89b89820bdf8a43b
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The document contains a significant number of embedded links, with at least one pointing to known malicious redirector infrastructure. While no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to lure users to potentially harmful websites, possibly for credential harvesting or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/strik?utm_term=raggedy+ann+and+andy+a+musical+adventure+tv+tropes In PDF document text
    • https://zipufalazuviw.weebly.com/uploads/1/3/1/8/131856517/wamel.pdfIn PDF document text
    • https://zujujogonawanuk.weebly.com/uploads/1/3/4/8/134879196/96ed5b2.pdfIn PDF document text
    • https://zemuxarasojutin.weebly.com/uploads/1/3/4/3/134374283/ratebabelojonamum.pdfIn PDF document text
    • https://soleduni.weebly.com/uploads/1/3/4/5/134581057/nuzujomuzamilibigare.pdfIn PDF document text
    • https://voruvagozi.weebly.com/uploads/1/3/4/7/134742827/mowifo_febipuku_mireniwagoxofo_kemivejomat.pdfIn PDF document text
    • https://mixosikopas.weebly.com/uploads/1/3/4/3/134383158/xemujot_zojitidazefad_nosadomelivur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc4ea123dfdd95b60eec996/t/5fc99e519309303fb82baf27/1607048786846/24616137821.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0fe386b97992eb55c938e/t/5fc142a57acac6192aef0312/1606501030518/vekidosagepizibolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/368f96b1-ad35-4f21-bf48-f90dbb85251d/10140514847.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fceca24affad1251da51c0e/t/5fd1eea47cf94534dc5ea80c/1607593637782/ant_wars_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c61cda86-1083-4257-a7ab-e528c7e25504/80357563594.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_off0000d30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30B 5560 bytes
SHA-256: 9421439e8c63a58067cacbef9d128af8fb05ae3f598bdf52dc3f3b133c9398cf
font_01_sfnt_off0000e5f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F7 10424 bytes
SHA-256: fe260ed49227778d1582156e3bb8dc9d258e80fa9efcceae5c35505878103ece

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