Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf1e19ec6b40843a…

MALICIOUS

PDF

49.3 KB Created: 2021-06-11 10:30:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 54f7ce566f5fe36180437338e7a6aef0 SHA-1: e260869b506a6af1d2eb1ada76b584f867426bea SHA-256: bf1e19ec6b40843ad24f6a73f80b938e2839f223ee9ce2b2ddc1ba02bec87e80
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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-candy-roblox-game-hack PDF link annotation
    • http://library.forda-mof.org/katalog/repository/hacked-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/cheat-codes-for-roblox-mad-paint-ball_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-download-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-robux-without-generator_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-traded-pokemon-to-evolve-without-trading_GM1094591345.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/robux-xyz_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-35-2-hack_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005131.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5131 27468 bytes
SHA-256: 2635acefe3dccb49e7c34eee7e85e9a05318201fd42ee8d8d8fc250f8ca81189
font_01_sfnt_off00009092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9092 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D39 18532 bytes
SHA-256: c351475c0f0afce284e60e17f233a33175f0c873a2a999275959df1a84f5847c

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