Malicious PDF — malware analysis report

Static analysis result for SHA-256 2372b0df27e6a31e…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 02:04:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 90ce2ac929081556d53bd8b0ce909da4 SHA-1: 227857bfcfc84d8ded21f413737e544e25852fd7 SHA-256: 2372b0df27e6a31eca96984e73bb03c9bfc5647366cac91d3adfb465e00b8c53
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 promises of game hacks and free currency for popular games like Coin Master and Roblox. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this malicious intent. While no scripts were explicitly extracted, the presence of embedded URIs and the ML classifier's high confidence suggest the document is designed to redirect users to potentially malicious sites for further exploitation or malware delivery.

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/406889139/coin-master-daily-free-spins-link-app-game-hack PDF link annotation
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-1-000-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-hack-free-robux-amp_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-minecraft-website_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/minecraft-pe-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/wurst-download_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-free-spins-link-31-march-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-vip-server-for-roblox-labyrinth_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/manucraft-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/game-free-cloth-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-do-you-get-free-robux-on-a-computer_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/pubg-uc-official-price_GM1330123889.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-hack-poke-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-spin-gratis-coin-master_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
stream_002_off000031be.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31BE 22684 bytes
SHA-256: 5c336b00c4eb49990bb9804ffec4e8c2eaad66c880d9a3151b91a0bf12963c7f
font_01_sfnt_off00006477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6477 18768 bytes
SHA-256: 1c5db3f7009fa9a9146ade2cbc2efb97c7baf1b0638c7caf06dc3a4af7679f36

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