Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ac20fde8600bcfc…

MALICIOUS

PDF

73.8 KB Created: 2021-03-07 08:31:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 40fc513658ca0b0b13996ac624d12bf4 SHA-1: 6d73e7893c6359d7b9fcf96bb8cc13b6f7cebf6f SHA-256: 8ac20fde8600bcfc248952b853a006ab41ffe347ffab7967a9e513337c3bf189
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, designed to farm traffic and potentially lead users to malicious content. The heuristic firings indicate a link farm strategy, with one URL specifically mentioning 'minecraft windows 10 hack client' as a keyword, suggesting a lure for users seeking cheats or exploits. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a second-stage payload.

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
  • 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://vilenefex.ru/wix?keyword=minecraft+windows+10+hack+client PDF link annotation
    • https://sitavekoked.weebly.com/uploads/1/3/5/9/135974486/fedulejakunoruxofipo.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/jonZ5QA/nizezelexopomipi.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/hb07RJX/resident_evil_revelations_2_ign_walkthrough.pdfIn PDF document text
    • https://livadekawa.weebly.com/uploads/1/3/5/3/135317457/gakavizapofilu.pdfIn PDF document text
    • https://bukalejobiwasek.weebly.com/uploads/1/3/1/4/131409200/tirinumivutefi.pdfIn PDF document text
    • https://cdn.sqhk.co/gapekozuwa/fsijGPL/teacher_appreciation_gift_ideas_during_covid.pdfIn PDF document text
    • https://zevakevo.weebly.com/uploads/1/3/5/4/135400716/41617a5eb.pdfIn PDF document text
    • https://jenafowumavadas.weebly.com/uploads/1/3/1/4/131437472/28b74a24942c096.pdfIn PDF document text
    • https://cdn.sqhk.co/latipizi/iiGbljj/minecraft_mod_1._7_10_world_war_2.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/kudulitifimuzi-donoguzemojas.pdfIn PDF document text
    • https://tonuwuro.weebly.com/uploads/1/3/0/7/130739505/743d9cd378.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/pasutiz/2019_appointment_calendar_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8864da2e-18a6-4c34-b411-1cb935332479/dwayne_johnson_daughter_age.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/cerelac_maize_nutrition_information.pdfIn PDF document text
    • https://a5fc3680-5c08-4cda-bd6c-abaa3bdf25bc.filesusr.com/ugd/ea5d7b_624e005a697248cab224da798fdaa02b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3df5ca2-a819-4507-945e-f119bb22a7b8/clarion_cx501_price.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/95295822142.pdfIn PDF document text
    • https://436010f1-0dd7-4950-aec0-3bdf337573e8.filesusr.com/ugd/5a4c69_34a55cc4b1ce4e8a85ee2f0b7b5f87be.pdf?index=trueIn PDF document text
    • https://2cc3dcad-61c1-4442-8662-ca5be7cd8672.filesusr.com/ugd/71b93f_c525cd4bd01743d18b53c1fb6df9af3f.pdf?index=trueIn PDF document text
    • https://8b5ac0f3-2bc4-49a6-9a99-2541af31b215.filesusr.com/ugd/f2ef67_09188d24b3b2460baaea243ca25c7b00.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fc23e79-d1f6-41d6-9a6b-d063d8b1f84f/79651149982.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_off0000dcd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD7 5464 bytes
SHA-256: 592911fec14f13fcca82c425b9c5d1e637b8e44a064147083b89301fa19ade55
font_01_sfnt_off0000ef8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8C 13344 bytes
SHA-256: 7c98771567dc4b5fae7f4c96d1b889ca94602d48445a9c53f4a6c3263457dc69