Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c19c0459cdd3365…

MALICIOUS

PDF

86.2 KB Created: 2021-03-21 01:30:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49844f5e9ed902c01b1b0a1e06da7bcf SHA-1: a8af83288888935ab5df5e40892a94c43e8bf74f SHA-256: 7c19c0459cdd336549912882e871305405bca745cd87d8ee1786666d14e28a54
96 Risk Score

Malware Insights

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

The PDF contains an external URI pointing to a suspicious domain, identified by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, contains text related to certification and metadata suggesting it was generated by wkhtmltopdf, a common tool for creating PDFs from web content. This suggests the PDF is likely a lure to redirect users to a malicious site for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://vilenefex.ru/123?utm_term=certify+that+the+above+information+is+correct
    • http://cocobuka3.xyz/516100091401ulpq.pdf
    • https://cdn-cms.f-static.net/uploads/4383922/normal_6021a5043d2cc.pdf
    • https://cdn-cms.f-static.net/uploads/4391898/normal_5fdaf44f08a61.pdf
    • https://cdn-cms.f-static.net/uploads/4412887/normal_602e770339143.pdf
    • https://cdn-cms.f-static.net/uploads/4467612/normal_603ebc59304ba.pdf
    • https://static.s123-cdn-static.com/uploads/4377909/normal_600485f396fa6.pdf
    • https://cdn.sqhk.co/wozovege/eqgj2m1/5644236443.pdf
    • https://cdn.sqhk.co/savageven/iewvxaf/weed_inc_idle_tycoon_mod_apk.pdf
    • https://cdn.sqhk.co/tororukiwuri/nia4bYB/ball_blast_game_cheat.pdf
    • http://zijafanovidiz.sportsontheweb.net/87842247166.pdf
    • https://cdn.sqhk.co/xajegakagiz/iljfhSM/coin_master_hack_without_verification_2020.pdf
    • https://cdn.sqhk.co/pabukerofo/hie5cjg/war_robots_download_pc_windows.pdf
    • https://cdn-cms.f-static.net/uploads/4468261/normal_605214f8ad9f4.pdf
    • https://cdn-cms.f-static.net/uploads/4419437/normal_6020feae8222d.pdf
    • https://static.s123-cdn-static.com/uploads/4460678/normal_5fc96ba4eeedf.pdf
    • https://cdn-cms.f-static.net/uploads/4476766/normal_601d6fb14bcf8.pdf
    • http://belkwigs.com/who_builds_reliabilt_windows62if9.pdf
    • http://pogadai.xyz/flow_chart_in_excel_format0467t.pdf
    • https://cdn-cms.f-static.net/uploads/4426418/normal_6013867abd600.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/sepawi/my_fantastic_4th_grade_fiction_book_report.pdf
    • http://vekejuf.atwebpages.com/novation_launchkey_49_driver.pdf
    • https://s3.amazonaws.com/lopadivupudexa/70553880747.pdf
    • http://xovolefewawex.atwebpages.com/wokogalinolovakiwegowaju.pdf
    • http://pekafujojef.onlinewebshop.net/kefipug.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9b1.bin
1c06653e43e09c1a7928d37a6a97244d7aa4e40122fc81c1de40d9b91e029dad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B1 5204 bytes
font_01_sfnt_off00010b34.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B34 1800 bytes
font_02_sfnt_off000113c2.bin
e6165278921b67998f6aab6806645ff2f28cc184a0c073051d12cecaeab611e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113C2 11420 bytes
font_03_sfnt_off00013acd.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13ACD 4324 bytes

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