Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c55314c9eedadf8…

MALICIOUS

PDF

75.9 KB Created: 2021-03-28 16:19:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc246a369f14a796acca44e8c56ef7a1 SHA-1: 79f8fb8d244d4d2d323dce1e174c1da907632a14 SHA-256: 0c55314c9eedadf8a533fb775826501bc314c138eec2506f29a11794dc4e34f4
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URL, https://mezovuduw.ru/wix?keyword=nba+2k+mobile+apk+android+oyun+club, which is likely used to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains keywords related to mobile games, suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/wix?keyword=nba+2k+mobile+apk+android+oyun+club
    • https://static.s123-cdn-static.com/uploads/4412573/normal_5ff4e0b76b31d.pdf
    • http://mantenancie.com/samsung_s5_mini_genuine_battery9ail2.pdf
    • https://cdn-cms.f-static.net/uploads/4377928/normal_60257f7443edb.pdf
    • http://intekzafast.online/leviroxuwuwilun476u2.pdf
    • http://vashastrahovka24.ru/anticoagulantes_orales_mecanismo_de_acciond0kdt.pdf
    • http://insurancecarusa.com/laramie_project_cast_breakdownswpdo.pdf
    • http://reduslim-sito.site/cheap_blood_bowl_miniaturesinu12.pdf
    • https://cdn-cms.f-static.net/uploads/4458421/normal_603e2d9e99de5.pdf
    • http://leafester.online/electrical_engineering_ebookszaxwx.pdf
    • http://zahlungsservice-ch.site/cowon_plenue_d3_specs4q86w.pdf
    • https://static.s123-cdn-static.com/uploads/4410414/normal_5ffdb0f20d7e8.pdf
    • https://static.s123-cdn-static.com/uploads/4368240/normal_5fc9896bd5026.pdf
    • http://kinoogf.space/review_naming_ionic_compounds_answer_keyx22ta.pdf
    • http://sbrf.link/joe_michaels_photography2sdzu.pdf
    • https://cdn-cms.f-static.net/uploads/4451955/normal_604421eb42fe3.pdf
    • http://walkover.me/wawuwiselc4h56.pdf
    • http://okclub.org/passengers_movie_original_scriptgbf3n.pdf
    • http://clobuss.ru/rogetozogomipimifafovo00mj6.pdf
    • https://static.s123-cdn-static.com/uploads/4421627/normal_60020ab02508f.pdf
    • https://cdn-cms.f-static.net/uploads/4482191/normal_604df363853f1.pdf
    • https://cdn-cms.f-static.net/uploads/4444123/normal_6015a5ccdded7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/79b67773-a82b-45f1-9a79-0022ad01b8ae/53022028971.pdf
    • https://uploads.strikinglycdn.com/files/dfb7876b-f1c4-4f85-8119-13b3bfd3f9eb/letatep.pdf
    • https://uploads.strikinglycdn.com/files/11eb27f3-de84-4862-8f93-af284589f7fb/libro_el_juego_de_la_vida_y_como_jugarlo_completo.pdf
    • https://uploads.strikinglycdn.com/files/2a1847ac-4ca5-4fcf-856b-b378f39ef868/pokifiloganufoma.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_off0000e84f.bin
cf3f6c78f4b4fe8f2b424911361317bd66c60cb0cad9dd1f6cbc091fcc6e1c1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE84F 5448 bytes
font_01_sfnt_off0000fad1.bin
67f92ec9aa2dfd82a695912a1742dd7bc6fcb3e2383efb395b0871c3041e8edf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD1 12136 bytes

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