Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14eb687254981c3…

MALICIOUS

PDF

77.8 KB Created: 2021-03-19 07:47:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a539fa8cf1fe950ef7c7611c1cfaeb6 SHA-1: 78fbe3a282c8700892b71470495117dd04b02a85 SHA-256: d14eb687254981c3f149aa5590c9986c1490437768573af69af99dc34f3a03f8
126 Risk Score

Malware Insights

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

The PDF document contains multiple external URIs, with a primary focus on 'https://xezojetit.ru/123?utm_term=autometrica+agosto+2018+pdf'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates that the PDF is part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/123?utm_term=autometrica+agosto+2018+pdf
    • https://static.s123-cdn-static.com/uploads/4377697/normal_5ffbae256bfdf.pdf
    • https://cdn.sqhk.co/zapajugadira/lIKGjcI/rechargeable_aa_batteries_with_charger_bunnings.pdf
    • https://static.s123-cdn-static.com/uploads/4490263/normal_6004c16d6399a.pdf
    • https://cdn-cms.f-static.net/uploads/4465128/normal_60474493a28e5.pdf
    • https://static.s123-cdn-static.com/uploads/4490141/normal_5fc8dea5a874e.pdf
    • https://cdn.sqhk.co/zanotunuzi/etFk5hh/muwukegexamutozejev.pdf
    • https://cdn.sqhk.co/vemegunir/IgfJkhc/munaruwu.pdf
    • https://cdn-cms.f-static.net/uploads/4481072/normal_6022bad6adef4.pdf
    • https://cdn-cms.f-static.net/uploads/4485578/normal_6039e05041e49.pdf
    • https://cdn-cms.f-static.net/uploads/4468289/normal_601ab8ff133ec.pdf
    • https://static.s123-cdn-static.com/uploads/4496815/normal_5ff3e1418d236.pdf
    • https://static.s123-cdn-static.com/uploads/4492555/normal_5fe5569043f5b.pdf
    • https://cdn.sqhk.co/fedelubu/jciiacS/strategic_management_professional_certification.pdf
    • https://cdn.sqhk.co/fakujodi/j9A4FOk/pirabamejofap.pdf
    • https://cdn-cms.f-static.net/uploads/4371498/normal_5fe6fff5527a7.pdf
    • https://cdn-cms.f-static.net/uploads/4452206/normal_6050153e4837f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://botasalipigu.epizy.com/nec_advanced_analytics_platform_solution_templates.pdf
    • https://c4cd0dbc-23d7-4f11-b65f-2561cec8abe5.filesusr.com/ugd/516793_5c2353fcc1ed4b26a3bacad1960c918d.pdf?index=true
    • http://nomulumipal.rf.gd/xcode_assistant_editor_manual.pdf
    • https://30f21d72-2b41-4965-a7bc-2abb02bf1ded.filesusr.com/ugd/47e66e_f743ead8382549c1abe72e1412507427.pdf?index=true
    • https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_65b50da45b474a6eab3f0089855baa7a.pdf?index=true
    • https://6200e599-3f2f-4e3e-ab45-e6977ed7e777.filesusr.com/ugd/f8de3e_6d8e8353cb0a4fc38f03081d33506a55.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efc8.bin
1142573e544796c3cbca1171cca7e4e648456d86341dcd59730689a0764859fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC8 5952 bytes
font_01_sfnt_off000103f6.bin
51da8a9aa04bd12ed578909d23e9ab240dc1e1cff4d7aa1a37788056cb0dea0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103F6 11292 bytes

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