Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e83dbfee3f52ce3…

MALICIOUS

PDF

75.9 KB Created: 2021-02-13 00:02:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 327803b814e98ce9be16a7582c5689c5 SHA-1: a59dd3ccc41ee212dab4930d37f6a8b5b59a928b SHA-256: 0e83dbfee3f52ce367c64e05d6c494f0ebf10da69682d62ba5582216eb92f535
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable hosting, and one specifically targets a 'coin hack generator' lure. The presence of external URIs and a link farm heuristic suggests an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=agario+coin+hack+generator PDF link annotation
    • http://prazdnikprosto.ru/format_factory_for_android_freewsh09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446921/normal_60117638616b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421062/normal_5feda69d4cc75.pdfIn PDF document text
    • http://bupro.asia/wimilutomepuki4m29a.pdfIn PDF document text
    • http://dkmz2.club/spatial_reasoning_testsdrwid.pdfIn PDF document text
    • http://muxadar.22web.org/balu_mahi_songs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403141/normal_5fe2139ee5313.pdfIn PDF document text
    • https://cdn.sqhk.co/sirejeforox/jqggjdd/modern_history_book_for_mpsc.pdfIn PDF document text
    • http://www-sfr-fr-monespace.com/8785720012952jo5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367300/normal_60138f5976eda.pdfIn PDF document text
    • https://cdn.sqhk.co/jebixusugak/hhjrgcz/67549798065.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383798/normal_6011d3fed3608.pdfIn PDF document text
    • http://gbo.guru/hit_or_miss_lyrics_nfg537pb.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/jifedefujodu/98971290046.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_off0000ecca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCA 4904 bytes
SHA-256: f94d5adaecf7eb47998eea326025993b3dfb0786c47d4cdec8707aca7eccf020
font_01_sfnt_off0000fd79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD79 10904 bytes
SHA-256: d01379aae33c05434fafd76a667ca936b4caed09e6d9cdf7ed6f0a9f742f667f

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