Malicious PDF — malware analysis report

Static analysis result for SHA-256 a588fcf1eb7042e5…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 06:49:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e868a4f50ff189d691be21365efe0184 SHA-1: a9b9182e907481eaa7d729afeafd84c24f4b1eea SHA-256: a588fcf1eb7042e52631835f4af4bf4aaf41dac22b454950e765e1bd23d4c7df
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 0.9980

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-hack-xyz-apk-download-game-hack PDF link annotation
    • http://lc.pustaka.unand.ac.id/repository/roblox-bank-tycoon-free-vip_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/roblox-hacks-for-prison-life_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-tix-generator-roblox_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/coin-master-hack-without-root_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/roblox-template-shirt-free-shipping_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • http://lc.pustaka.unand.ac.id/repository/minecraft-112-hacked-client_GM479516143.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_off00003047.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3047 23048 bytes
SHA-256: e8d204d41578f3f4717d30ebab3aed68a22ebf2d92c12ddc8003bb23130fc1d0
font_01_sfnt_off0000641b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x641B 19248 bytes
SHA-256: 63e7afbc279ae07a6657302252a2a72cdffddbce7c369bef903412ae1e18112b

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