Malicious PDF — malware analysis report

Static analysis result for SHA-256 584985c522037ceb…

MALICIOUS

PDF

75.2 KB Created: 2021-02-04 00:21:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5abb7db21d5bb431908e9c8dba6000d3 SHA-1: a51318bf15a53d783ffebd211949a14a179f8311 SHA-256: 584985c522037ceb80bb5eed668a4fef8a97d8cfbec6040d230d3f5287389b0f
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or link-farming scheme. The document body, though heavily obfuscated, appears to be a lure related to 'design thinking skills pdf'. No scripts were extracted, but the presence of many external links indicates an attempt to redirect users to potentially harmful content.

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://maypoin.ru/aws?utm_term=design+thinking+skills+pdf PDF link annotation
    • http://allmedbook.com/small_business_loans_for_veterans_spousest48ax.pdfIn PDF document text
    • http://organicsss.space/xapuxikezuluxejeporijinohsutr.pdfIn PDF document text
    • https://zukevijidogokil.weebly.com/uploads/1/3/0/7/130738647/5996664.pdfIn PDF document text
    • https://wixurawitubeza.weebly.com/uploads/1/3/4/3/134319602/rogerapep.pdfIn PDF document text
    • http://blockingscenery.com/buwebovilopoguzjpd7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366382/normal_5fe3b943b21c9.pdfIn PDF document text
    • https://cdn.sqhk.co/jorafulati/h0jbxPR/nuts_bolts_screws_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikebepo/YLuNRRM/digital_clock_face_generator.pdfIn PDF document text
    • http://idealica-italiaoficial.site/origami_paper_crane_stepsuiaum.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/9xIh7ia/16772409215.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501989/normal_5ff14e99ea925.pdfIn PDF document text
    • https://nepokotivo.weebly.com/uploads/1/3/2/8/132814168/mogikoxebo.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/feseni/canon_70d_camera_instruction_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/75983895261.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_off0000eae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE1 5060 bytes
SHA-256: f9e3f35e25c6c649d509c757ec549290c54d6d4aed0bf2b06fd51219818effef
font_01_sfnt_off0000fc25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC25 10404 bytes
SHA-256: d8619a407946d1dbd1597b22fd3831af9e0e4141b0a069d01a91e8a1d2dcad36

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