Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd3f41f207a58553…

MALICIOUS

PDF

37.6 KB Created: 2021-07-03 18:05:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6d761649e5d6a4d93a52810823657495 SHA-1: 755a59bd3b4db08270dc7d066685442ad5bbb178 SHA-256: bd3f41f207a5855338a0861475dada2df84f1c2d58553cefe108aec46fa05a8f
82 Risk Score

Malware Insights

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

The PDF document contains a high-confidence heuristic flagging it as a lure for game hacks, specifically linking to 'rewards-robux-game-hack'. This URL is also present in the document body and is the primary IOC. The document's purpose is to trick users into visiting this malicious URL, likely leading to further malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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/rewards-robux-game-hack PDF link annotation
    • http://digilib.uim.ac.id/repository/coin-master-free-download-pc_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-download-games_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/get-robux-today_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-2021-unpatched_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/pastebin-free-obc-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-fan-hack_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/krnl-roblox_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-hack-mod-apk-2021_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-free-spins-link-2021-blogger_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/unlimited-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003b19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B19 22944 bytes
SHA-256: 6798feb7b34051fc77d9465bcd2595e818e108198cbadba5fed6dcac12cfc65e
font_01_sfnt_off00006e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E77 18888 bytes
SHA-256: 13d7bc9f49b8b591f3713cbd9cb1632c430be663ac63cdfbfdb50d830d5ed704

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