Malicious PDF — malware analysis report

Static analysis result for SHA-256 2139ce0325ac2ec3…

MALICIOUS

PDF

36.0 KB Created: 2021-07-06 13:29:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 349082d8553b4d934dcdba517f9af615 SHA-1: 5d376e860baf772771420b423686c06743f6b199 SHA-256: 2139ce0325ac2ec3a908464443c8f3a1bf527697b9ec4663bfc6ebac0a932c9d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs, with a primary focus on lures for game hacks and free views, such as 'what-tiktok-free-views-without-verification-game-hack'. These links direct users to external websites, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://netcdn.tw/app/835599320/what-tiktok-free-views-without-verification-game-hack PDF link annotation
    • http://library.stieyapan.ac.id/repository/pokemon-go-free-30-ultra-balls_GM1094591345.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/pokemon-go-free-event-box_GM1094591345.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/hack-card-collection-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-tiktok-invitation-template_GM835599320.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-ios-10_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-apk-hacked-3526_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-play-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-chest-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/smart-lodhi-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-how-send-report-to-hacker_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3404 23304 bytes
SHA-256: 7bab71b7ec1f1c8b7e0091bb14bec01b1abbc85f43fcf7d0a209e43c3b18df68
font_01_sfnt_off00006892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6892 18776 bytes
SHA-256: f178b0c05354dad86128c4ae5d3912eaa08bd6136f80427919e99602ad55f526

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