Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf69901b7e1fa531…

MALICIOUS

PDF

33.8 KB Created: 2021-07-06 01:11:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6bbebfddb949ac6c3b33ba33954fd489 SHA-1: 69ebf3806bf53f77fb8e82bf8a4515a9d94f00d9 SHA-256: cf69901b7e1fa5313518e588233407579b476de3770811786e2d82e42870a64b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary focus on luring users with 'free Robux' and game hacks. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates a malicious intent to redirect users to potentially harmful sites. While no scripts were extracted, the document's structure and embedded links suggest it's designed to trick users into visiting malicious domains, likely as part of a phishing or malware distribution scheme.

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/actual-free-robux-game-hack PDF link annotation
    • http://digilib.stimata.ac.id/repository/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-minecraft-gift-card_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-girl-hair-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/level-coin_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-free-shirts-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-earn-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-hack-jailbreak-beta-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-free-spin-daily-bonus_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-hack-roblox-on-mobile-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-game-hacking_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-hack-coin-master-pc_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_off00002f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F43 21832 bytes
SHA-256: 0d70860197db1a019979e207233064f179e7b20dd1d442069606017914adcf29
font_01_sfnt_off00005f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F92 18896 bytes
SHA-256: bd3de038992f776bb75c9d87ab01591e9a87ca5e55efa1086dfb4f2335c858c6

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