Malicious PDF — malware analysis report

Static analysis result for SHA-256 357a054849748b03…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 19:25:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ad84c0582c0e129bbe9d508d5f4d89bf SHA-1: 5ec0618dae9189fda6a93a868f681ea414d04c8b SHA-256: 357a054849748b03188ad005ee0373757d966da2e09f176f0ade9daf074104db
102 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which are related to obtaining free in-game currency or hacks for popular games. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and the ML classifier strongly flagged this PDF as malicious. The document body and extracted URLs suggest a scam or phishing attempt designed to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/how-to-get-more-robux-for-free-game-hack
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-free-spins-today-new_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-facebook_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/free-robux-no-verification-needed_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-free-daily-spins_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/free-star-codes-roblox_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/free-robux-net_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-hack-app-android-download_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/free-roblox-game-card-generator_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/minecraft-auto-miner-hack_GM479516143.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/robux-hack-no-verification-no-survey_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/earn-free-robux-for-roblox_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/blogger-coin-master-free-spins_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-game_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/pubg-uc-in-rupees_GM1330123889.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-free-spins-hack-2021_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/hack-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002df5.bin
367c55adb0b743cb47fcf3f7de4dc6f488773c59a64cb78f917ccd3ccfb8f690		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DF5 22408 bytes
font_01_sfnt_off0000600b.bin
2bff2d2121057f006b71b066e94fd010776662c2bbd91426c2b13817cbe3f110		 pdf-font-stream PDF embedded font (sfnt) at offset 0x600B 19180 bytes

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