Malicious PDF — malware analysis report

Static analysis result for SHA-256 91f41d4c8c934b17…

MALICIOUS

PDF

50.3 KB Created: 2021-06-03 23:45:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: caa83066e82dc0d7df981f40c776d4cc SHA-1: 044bf96920e677630fe5f534933af2f748d356b7 SHA-256: 91f41d4c8c934b172027881a517757ea5554b491256e768702d2991e507a8efc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a game hack, directing users to a malicious URL. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to a potentially harmful site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9734

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 https://netcdn.online/app/406889139/hack-coin-master-nyc-game-hack PDF link annotation
    • http://katalog.stikesmukla.ac.id/repository/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/hack-avatar_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-800-robux_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052a1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52A1 24884 bytes
SHA-256: fef043ba8fbcd0e241066126af623ebc6852a01afe969b68980df7582f64c0b3
font_01_sfnt_off00008b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B48 4028 bytes
SHA-256: 6a4891da4f8b73c02e22ecd6fa566d6bb4f5f2d5575b30a343f3d3c5e0919267
font_02_sfnt_off000098eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98EB 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off0000a2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2DB 17896 bytes
SHA-256: 6bda2244236a3c42e7a8523e9dc799500b38f97cf514babfc865537c80dbf03b

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