Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3aec09562c8d1fb…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 00:49:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7bf83aed7adcc4e824af0d061e9e7ac0 SHA-1: 798dbcd51bd168233e308ad341d92ef7d6ab0b4f SHA-256: a3aec09562c8d1fb73d84acc870e0cdf0215eb56efd0ec753b37b5bbfc247392
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a document body that explicitly lures users with promises of game hacks for popular titles like Roblox and Coin Master. The primary URL, http://netcdn.tw/app/431946152/how-to-become-a-hacker-in-roblox-game-hack, is flagged as a redirector to malicious content. While no scripts were extracted, the document's structure and content strongly suggest it's a phishing or malware distribution lure.

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/431946152/how-to-become-a-hacker-in-roblox-game-hack PDF link annotation
    • http://opac.acehresearch.org/repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/roblox-free-items_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/play-coin-master-online-free_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/ride-line-hack-roblox_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/microsoft-roblox_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-bicycle-man-roblox_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/nuevo-hack-de-robux-2021-funicona_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/como-generar-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/how-to-actually-get-free-robux_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_off0000305d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x305D 22196 bytes
SHA-256: 6aebe7c6492ea4ad4568bbb4a363add3c6acfe867ea30b2c2a80e54f30076e23
font_01_sfnt_off00006159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6159 19080 bytes
SHA-256: 743517270bf20e3fdbac5f31fc5184e0e8be1cfb370cc187773a8eda3f974f51

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