Malicious PDF — malware analysis report

Static analysis result for SHA-256 193e0bba2a008aed…

MALICIOUS

PDF

69.1 KB Created: 2021-02-03 00:45:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bcdf602c102f4daefcb8a46b77fbdc80 SHA-1: dd35a14a04f3687aa3a2f24848adae042eef25d2 SHA-256: 193e0bba2a008aed107d79613021ab02f12bc0ef1fdf3fddbb5478672b5d3f6a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, likely delivered via spearphishing.

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://jacksth.ru/123?utm_term=the+legend+of+zelda+a+link+to+the+past+rom+emuparadise PDF link annotation
    • http://kkkirrreeee.space/93493895968l6t0v.pdfIn PDF document text
    • http://899themes-demo.ru/ddal08-_01l9g5d.pdfIn PDF document text
    • https://cdn.sqhk.co/pozuwifofub/jeljfij/wujozajubapajuwibida.pdfIn PDF document text
    • https://rogujodur.weebly.com/uploads/1/3/4/8/134899240/8414515.pdfIn PDF document text
    • https://cdn.sqhk.co/duloputemab/ONHCieB/pixel_royale_unblocked_games_77.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419235/normal_6005e6008d9b2.pdfIn PDF document text
    • https://febufovita.weebly.com/uploads/1/3/4/3/134324671/neporukoz-sanil-minafamida-vomamatejezorew.pdfIn PDF document text
    • https://cdn.sqhk.co/pumibavi/iia2fjh/37786946731.pdfIn PDF document text
    • https://mimasalidapu.weebly.com/uploads/1/3/4/4/134466186/e72324a.pdfIn PDF document text
    • https://cdn.sqhk.co/ratevusur/jQB8ir0/snake_eyes_meaning_marathi.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/789501.pdfIn PDF document text
    • https://cdn.sqhk.co/makubeku/oggu1ja/62640088061.pdfIn PDF document text
    • https://cdn.sqhk.co/midipijikami/68jh0Ei/zombie_smashers_x.pdfIn PDF document text
    • https://xigokujote.weebly.com/uploads/1/3/4/6/134649591/wimodinagube.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cf5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF5B 5520 bytes
SHA-256: 8d35e1b15d012f30e1f61d818c04c450ccd93a6151442cf5514e416f7543ee5e
font_01_sfnt_off0000e208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE208 10852 bytes
SHA-256: 7e1f9d0ebb06035a8b2443935ad0fae0bf3219eb44c92c4b582c53026e1658fb

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