Malicious PDF — malware analysis report

Static analysis result for SHA-256 328eb70458ca5414…

MALICIOUS

PDF

76.7 KB Created: 2021-02-27 18:55:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5dfc47ed63ae2a540f7f28b7b76fe08d SHA-1: d3056e18c708cfbc02fde00c4fb68be26b799d55 SHA-256: 328eb70458ca54140f2b73ce5a918a36377478854e864109b53c9cefa8a6ed39
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, with a primary one pointing to 'fokemale.ru', suggesting a redirection to a malicious site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the malicious intent by identifying the document as a link farm on disposable hosting, likely used to distribute malware or conduct phishing attacks.

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://fokemale.ru/123?utm_term=the+mouse+tale+plot+extract PDF link annotation
    • https://cdn.sqhk.co/nadipozow/dz7jaMU/54897173037.pdfIn PDF document text
    • https://lagonola.weebly.com/uploads/1/3/4/8/134851586/b5b94581e3ba9df.pdfIn PDF document text
    • http://zolomakowifop.iblogger.org/63132637256.pdfIn PDF document text
    • https://cdn.sqhk.co/sebidurubuze/gchdice/joxepimuwetojuvugamibeb.pdfIn PDF document text
    • https://gewopisoxow.weebly.com/uploads/1/3/4/3/134306678/6108450.pdfIn PDF document text
    • https://cdn.sqhk.co/pomiwuximu/nWP7jha/timijanisegol.pdfIn PDF document text
    • https://rokojilezel.weebly.com/uploads/1/3/2/3/132302907/7ef4c40.pdfIn PDF document text
    • https://kuwodugedo.weebly.com/uploads/1/3/0/7/130739904/5615301.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dozonox.epizy.com/fundsmith_equity_fund_i_class_accumulation_factsheet.pdfIn PDF document text
    • http://gonurorirezode.epizy.com/kuzarezozibirika.pdfIn PDF document text
    • http://fegozijagomon.rf.gd/hedwig_s_theme_cello_sheet_music.pdfIn PDF document text
    • http://golukotekitu.epizy.com/39577437319.pdfIn PDF document text
    • http://sekovukubetib.epizy.com/mk11_fatality_guide_ps4.pdfIn PDF document text
    • http://gugogedufos.epizy.com/72315973437.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/68127486263.pdfIn PDF document text
    • http://robabunegulawi.rf.gd/74723468434.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_off0000ee73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE73 5188 bytes
SHA-256: 195c4f3b913835ad5d953a3dd3b6e3d7bc2d1773a175e7a39cbc0ebc13757cca
font_01_sfnt_off0000ffed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFED 11440 bytes
SHA-256: 0c8234095fe8ece3f4125d7cc1455c8ccca28a9529893157a292a95402c963df

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