Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a5896f33596c4be…

MALICIOUS

PDF

47.4 KB Created: 2021-06-11 04:45:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 992535cfed55d689bae693a2a13b3afa SHA-1: 086a56f143b215cbd4eabe0212d0ef0ad10c81ac SHA-256: 8a5896f33596c4be272da6782efd7270da8b3b79d504c3e95be3026d80caf72e
82 Risk Score

Malware Insights

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

The PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' redirector. The primary malicious URL identified is https://netcdn.tw/app/431946152/free-roblox-toy-redeem-codes-game-hack, which likely leads to a phishing or malware download page. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a social engineering lure for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/free-roblox-toy-redeem-codes-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/archery-master-3d-coins-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-connection-lost_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-with-no-download_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/pokemon-go-free-pokeballs-code_GM1094591345.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/pokemon-go-free-friends_GM1094591345.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/toolbox-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hacks-for-pet-food_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-no-human-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-do-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-spin-and-coins-free_GM406889139.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_off00004fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FBA 30548 bytes
SHA-256: 1dab9a120fa6b7f474602d5b54d8ba3f621268eb4ac521c346b3c15fd517b11f
font_01_sfnt_off000095ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95EC 18564 bytes
SHA-256: 3b368aa9d520ce3345159e13a6fa05e6e4ac5da3a9eff685680ec2678b25aa0f

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