Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2622a7d3d89e172…

MALICIOUS

PDF

63.6 KB Created: 2021-02-23 22:32:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e66786b4f9390fb3b5b24dd04751eccd SHA-1: dec088f740016cbfc539c5d3e6b56ef7be6c159e SHA-256: d2622a7d3d89e172189994c92c835bdfaa3fc699d4cbd275d5fb01bad7754167
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/wix?keyword=hunter+x+core+manual+program PDF link annotation
    • http://bijipejip.iblogger.org/93521720236.pdfIn PDF document text
    • https://tedagenuv.weebly.com/uploads/1/3/2/6/132682668/1199061.pdfIn PDF document text
    • https://bimuxafidiw.weebly.com/uploads/1/3/4/7/134701061/8593553.pdfIn PDF document text
    • https://jepigosewuva.weebly.com/uploads/1/3/2/3/132302921/pujajikovefurowut.pdfIn PDF document text
    • https://guxodobozit.weebly.com/uploads/1/3/4/3/134333536/c63b51663a4e.pdfIn PDF document text
    • https://xurepisex.weebly.com/uploads/1/3/4/7/134718841/abff75cdfc7607f.pdfIn PDF document text
    • https://tusigidufamem.weebly.com/uploads/1/3/5/3/135350313/davuwipokodutekin.pdfIn PDF document text
    • https://welavomuwaj.weebly.com/uploads/1/3/4/6/134633166/6129643.pdfIn PDF document text
    • https://zozetaxurumel.weebly.com/uploads/1/3/4/5/134590082/molif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nasalimutele.rf.gd/36171592371.pdfIn PDF document text
    • http://jelasojeb.rf.gd/greenpeace_southeast_asia_report.pdfIn PDF document text
    • http://sezajuvijib.rf.gd/57216704089.pdfIn PDF document text
    • http://jiwabesufag.epizy.com/house_of_lords_hs2_select_committee_report.pdfIn PDF document text
    • http://voxinuxo.epizy.com/bosch_dishwasher_repair_manual.pdfIn PDF document text
    • http://govujetimavex.epizy.com/good_doctor_imdb_parents_guide.pdfIn PDF document text
    • http://lesexuxu.rf.gd/adobe_photoshop_full_version_for_pc.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_off0000bd8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD8D 5104 bytes
SHA-256: 0fe843fc888a28630650c2fb7bb573def6f8aec8657bbe3760e806f105f958c1
font_01_sfnt_off0000ced7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED7 10192 bytes
SHA-256: 76c07060ddaca071c690efe47aafe0ac6c043df0351288da300635e4d6efa46f

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