Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a522ef5ce33384d…

MALICIOUS

PDF

64.3 KB Created: 2021-04-06 04:43:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 239cb906017991c6096ea3ecf6390da1 SHA-1: a94de3405a7dde9719485c86c30106e02b79b802 SHA-256: 0a522ef5ce33384d710be0272e9410ae39ee2c84614fab8406c2037b1832abdd
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL that mimics a game guide, a common lure for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URI suggest an attempt to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=summoners+war+toa+guide+2017
    • https://cdn-cms.f-static.net/uploads/4424010/normal_6036c6e7c901e.pdf
    • http://proita.space/christopher_stone_entitled_should_trees_have_standing_towards_legal_rights_for_natural_objectsoq78x.pdf
    • https://cdn-cms.f-static.net/uploads/4450430/normal_603ced8269b48.pdf
    • http://ins.expert/us_fast_food_industry_report50667.pdf
    • http://zefedupawomodos.22web.org/ceh_v9_certified_ethical_hacker_version_9_practice_tests.pdf
    • https://static.s123-cdn-static.com/uploads/4401519/normal_5fe475d52f112.pdf
    • https://cdn.sqhk.co/lowilufape/ijgihjA/2369695522.pdf
    • https://cdn-cms.f-static.net/uploads/4443354/normal_603cfa125743b.pdf
    • https://cdn.sqhk.co/tipefima/hoqajaY/27083087038.pdf
    • https://cdn-cms.f-static.net/uploads/4452199/normal_602bb7a9217ad.pdf
    • http://foyou.store/donutezt9w65.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jujageritoxo.atwebpages.com/medicinal_chemistry_journals.pdf
    • https://s3.amazonaws.com/retobifulipo/poster_design_word_template.pdf
    • http://moretavumafoge.epizy.com/paradise_city_game_pc.pdf
    • https://s3.amazonaws.com/gumagabu/37645100074.pdf
    • http://wuwedilejom.myartsonline.com/69755450191.pdf
    • http://fuvarijes.atwebpages.com/what_is_the_purpose_of_an_assembly_drawing.pdf
    • 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_off0000bdb8.bin
585e034669293929b5359c04967765cefb78261f78eaf0fb1af39f7d16d3c404		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDB8 5712 bytes
font_01_sfnt_off0000d126.bin
5ed35a96a810eef9038c0a282b7a36b7998f1d6a1e764e2f4873f65173524c23		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD126 9836 bytes

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