Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c152d06664b31e9…

MALICIOUS

PDF

73.7 KB Created: 2021-01-19 11:41:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8675f5c1716cb6e84ffcdb623b1cbf1f SHA-1: d435981190f9f1b1a8e3acc5972c43262478513a SHA-256: 4c152d06664b31e9ac0a527a667418e7f5405da0c49887aef3a08debd3d506c8
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of phishing or malware delivery. The ClamAV detection and ML classifier further support its malicious nature. Although no scripts were extracted, the presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/123?utm_term=wwe+2k14+gamestop PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388422/normal_5fd118868e1c1.pdfIn PDF document text
    • https://lisudite.weebly.com/uploads/1/3/2/6/132682892/5516814.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/bhahf1o/real_steel_game_download_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/bajipugotox/gcrCyFP/the_weather_channel_app_download_for_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/gukugifixija/gWijhcc/fanatical_car_driving_simulator_mod_apk_hack.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383929/normal_5fe7cc408648a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393893/normal_5fc3e3d3bad0e.pdfIn PDF document text
    • https://cdn.sqhk.co/sijiposago/hbyjOji/blade_element_theory_nptel.pdfIn PDF document text
    • https://cdn.sqhk.co/nivurerazusa/8Sg2qja/nilosarakokesewolosa.pdfIn PDF document text
    • https://cdn.sqhk.co/mepowokugo/jh0hdhh/menugapegerozubokaj.pdfIn PDF document text
    • https://cdn.sqhk.co/poluxofad/ihhhwid/kewarijorebik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/mokiwidazivonovisaxogemo.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/android_mod_apps_forum.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/keto_x_factor_supplement.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/low_power_methodology_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/50616774530.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDDA 5452 bytes
SHA-256: d28f8ce7965b34c755b156e3289ec53f5a0fdf100a4d9d02d0f3abfbc8f71a0e
font_01_sfnt_off0000e096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE096 10552 bytes
SHA-256: 5b2c36be311b3a310e5c9b4d466d67350f0b4935974eeefd1df4bae630699763
font_02_sfnt_off00010518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10518 16076 bytes
SHA-256: 97990adcc91a1e334b404002f9a6b356dd0e0e66c9193a0499481f503a30e292

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