Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bbedc0939d71b04…

MALICIOUS

PDF

68.2 KB Created: 2021-03-20 21:53:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: dad280b1ab01623203755ae03e2e1ee2 SHA-1: 4e609f98eb4856ba566cead522468d8f02dc5a19 SHA-256: 2bbedc0939d71b04e7e2c3eb3dd658cc09a4ddea1e0ada6965b24c3fe77d4376
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious document designed to redirect users to harmful sites.

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://mezovuduw.ru/wix?keyword=sample+interest+letter+to+join+a+sorority PDF link annotation
    • http://idealicaitalia.website/what_do_the_cards_represent_in_alice_in_wonderland6fywc.pdfIn PDF document text
    • https://cdn.sqhk.co/xenivoronizu/5iaE4ib/57874675632.pdfIn PDF document text
    • http://xutefizil.getenjoyment.net/pefosejoboxemejoko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500678/normal_5fe625b4cec8b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382973/normal_5fc5db7173c9b.pdfIn PDF document text
    • https://cdn.sqhk.co/muxigatatini/heR3jiJ/48900507281.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369165/normal_6052044b217ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463002/normal_6038ee48ae2c3.pdfIn PDF document text
    • https://cdn.sqhk.co/woxekivepi/liigOhg/define_merchant_guild_middle_ages.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464303/normal_5febed880c63d.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/aIhbJvO/pulsera_smart_samsung_galaxy_fit_lite.pdfIn PDF document text
    • http://sakhavto.ru/read_very_short_stories_online_free_romancequo6g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427820/normal_5fd81a82e2949.pdfIn PDF document text
    • https://cdn.sqhk.co/rizitewav/Pvshhhj/nirukami.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eb501b8-7b00-4be2-9fae-96e4865d0d74/guzebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efe478af-22a8-4fc4-aec2-cd48e573e913/40223344562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2577a95c-49aa-4e15-a715-dc62bf7d066b/what_to_say_to_parents_expecting_a_baby.pdfIn PDF document text
    • http://zonafikepejese.onlinewebshop.net/lipomimonizob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c117225-2302-4334-9b55-e7c7eff2d88d/88292210624.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_off0000ce1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1C 5248 bytes
SHA-256: 50a2a775392aaf1da04aab7078e63a4f9361555351d4555e419d609334961734
font_01_sfnt_off0000dfe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE2 10356 bytes
SHA-256: 794b463cf11917d52f52fc4f72d794b2397f52227faf378b9ee568e5c51415e8

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