Malicious PDF — malware analysis report

Static analysis result for SHA-256 341e6cc256ddff22…

MALICIOUS

PDF

73.2 KB Created: 2021-02-16 09:53:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 87d95c6086de6a58ed5b6e23dfc7733a SHA-1: 4e1e6a66c0e0cf5227c9a53c288cbf80d8ec3930 SHA-256: 341e6cc256ddff22938a93dbf4c6818315bb9f1b6a1c6888e6c9ec5071147579
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, many hosted on disposable domains or link farms, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'vocabulary power plus book 4 lesson 9 answer key', aiming to trick users into clicking the embedded links.

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://seumenha.ru/wb?keyword=vocabulary%20power%20plus%20book%204%20lesson%209%20answer%20key PDF link annotation
    • https://cdn.sqhk.co/loberutebe/idrSKjf/scent_of_a_woman_full_movie_online.pdfIn PDF document text
    • https://damanula.weebly.com/uploads/1/3/1/8/131856109/424e74db.pdfIn PDF document text
    • http://onlinetyz.xyz/lagu_armada_harusnya_aku_cover_stafabandcae2d.pdfIn PDF document text
    • https://wafulezejo.weebly.com/uploads/1/3/4/7/134748518/741391728d.pdfIn PDF document text
    • http://poverkavoda.website/nodiravobiw9q6d.pdfIn PDF document text
    • https://cdn.sqhk.co/mimotulifoti/tgiMa0q/fiziporirojiwafijinig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475392/normal_5fd3d6f4af7cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403565/normal_5ff1d46564153.pdfIn PDF document text
    • http://nukicew.xyz/jurassic_world_evolution_battle_arena_all_dinosaursxty2s.pdfIn PDF document text
    • https://ravuwiva.weebly.com/uploads/1/3/4/5/134519437/xajixukuwowej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422897/normal_6005a6fc08e48.pdfIn PDF document text
    • https://cdn.sqhk.co/siwebove/igNginU/sanic_theme_loud_roblox_id.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5fd76ccf002a6.pdfIn PDF document text
    • https://fogevama.weebly.com/uploads/1/3/1/1/131164507/8df12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378160/normal_5fc7aa6b03e3f.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_off0000dbe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE7 5536 bytes
SHA-256: 976dcfe9d06de1e7b5a56f2289752eedf73061aae6c9f1da4bb66ffcc73f5d28
font_01_sfnt_off0000eee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE1 11720 bytes
SHA-256: 5fd3eb985f4a48a8a6ff0866fd1998f285d80b79cecb6a09c677a24a9581421a

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