Malicious PDF — malware analysis report

Static analysis result for SHA-256 029ed7c0b2a464b4…

MALICIOUS

PDF

91.4 KB Created: 2021-02-28 10:56:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: df32d2bc4e8a4ea0d4a9f07e674a47be SHA-1: a9bd3b261b1e609e357178ddb8a3b4c87ef7a1ec SHA-256: 029ed7c0b2a464b431353b2d894127a76e2ce4f791c2a0444b92ed109315249a
186 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of numerous external links suggests an attempt to lead the user to a compromised or malicious resource.

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
  • 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.
  • 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://xezojetit.ru/strik?utm_term=the+mousetrap+character+analysis PDF link annotation
    • http://jovefupe.mywebcommunity.org/4915298203.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/what_is_place_value_in_math_1st_grade.pdfIn PDF document text
    • https://jafedemigizol.weebly.com/uploads/1/3/4/5/134588438/9560264.pdfIn PDF document text
    • http://fudoviwil.mywebcommunity.org/45229480165.pdfIn PDF document text
    • http://lilubaxubaxulu.sportsontheweb.net/40538476295.pdfIn PDF document text
    • https://cdn.sqhk.co/nemuvefik/cajdkhf/california_lottery_scratchers_games.pdfIn PDF document text
    • http://dororuminaxa.mywebcommunity.org/xobagepemine.pdfIn PDF document text
    • https://petugaxuw.weebly.com/uploads/1/3/5/3/135397026/dofesiwuz-lomogatamo-liniwuwat.pdfIn PDF document text
    • https://cdn.sqhk.co/xenumobavun/exs38Rv/xbox_one_controller_wireless_adapter.pdfIn PDF document text
    • https://cdn.sqhk.co/gizivapejoko/3tBicGo/81068987102.pdfIn PDF document text
    • https://jesugenug.weebly.com/uploads/1/3/1/4/131406432/0393089cec25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410418/normal_5fd7c27560b88.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451356/normal_5fca06164cd8e.pdfIn PDF document text
    • https://cdn.sqhk.co/lunexubafexo/e7Jha9l/dwarf_orange_trees_for_sale_in_texas.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/purabuvawofemanosedeludar.pdfIn PDF document text
    • https://danikobunib.weebly.com/uploads/1/3/4/7/134755608/toxaxomagi.pdfIn PDF document text
    • https://cdn.sqhk.co/bobimugura/cibhgz4/avi_one_square_bird_cage_with_stand.pdfIn PDF document text
    • https://kisuvali.weebly.com/uploads/1/3/1/1/131163683/jiwifodinowolibafum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00012473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12473 5224 bytes
SHA-256: d3c1b93b30d3b2b07665fe9b872376ea95e0b9619cbefb9c42d89ce13b4b8c06
font_01_sfnt_off00013613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13613 13080 bytes
SHA-256: 0e7355f5bcb5cfbd09824c4af903c650e1f37d69fa38380eaed4a700deb2fd34

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