Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a698f41757f4c96…

MALICIOUS

PDF

32.5 KB Created: 2021-07-04 01:36:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 89d31335a0cf3f4a2d26b59faf6fb989 SHA-1: bfe4a8f67879b556f68a40253572440f0eb699b1 SHA-256: 8a698f41757f4c96f51f530570aab30bb51dbf6698ef53cbb72dee710cc9dc28
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains numerous links to external websites advertising game hacks and free in-game currency, such as Minecraft and Robux. The presence of a direct download URL and a large number of SEO-optimized PDF links suggests a malicious campaign aimed at tricking users into downloading potentially unwanted or harmful software. The ML classifier also strongly indicated maliciousness.

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/479516143/minecraft-free-install-game-hack
    • https://digilib.darmajaya.ac.id/repository/hack-game-plus-com-coin-master_GM406889139.pdf
    • https://digilib.darmajaya.ac.id/repository/wahoo-gaming-co-free-robux_GM431946152.pdf
    • https://digilib.darmajaya.ac.id/repository/the-most-opiest-script-hack-in-roblox_GM431946152.pdf
    • https://digilib.darmajaya.ac.id/repository/real-free-robux-games-on-roblox_GM431946152.pdf
    • https://digilib.darmajaya.ac.id/repository/coin-master-hack-mod-apk-2021_GM406889139.pdf
    • https://digilib.darmajaya.ac.id/repository/roblox-phantom-forces-hack_GM431946152.pdf
    • https://digilib.darmajaya.ac.id/repository/how-to-get-free-robux-games_GM431946152.pdf
    • https://digilib.darmajaya.ac.id/repository/how-to-install-minecraft-for-free_GM479516143.pdf
    • https://digilib.darmajaya.ac.id/repository/bux-life-free-robux_GM431946152.pdf
    • https://digilib.darmajaya.ac.id/repository/113-hacked-client_GM479516143.pdf
    • https://digilib.darmajaya.ac.id/repository/free-backpacks-on-roblox_GM431946152.pdf
    • https://digilib.darmajaya.ac.id/repository/orewards-com-free-robux_GM431946152.pdf
    • https://digilib.darmajaya.ac.id/repository/how-do-i-get-free-coins-in-coin-master_GM406889139.pdf
    • https://digilib.darmajaya.ac.id/repository/free-coin-master-credit_GM406889139.pdf
    • https://digilib.darmajaya.ac.id/repository/coin-master-34-4-hack_GM406889139.pdf
    • https://digilib.darmajaya.ac.id/repository/spin-hack-for-coin-master_GM406889139.pdf
    • https://digilib.darmajaya.ac.id/repository/wwwbandicamcom-hack-roblox_GM431946152.pdf
    • https://digilib.darmajaya.ac.id/repository/free-robux-no-verification-2021-android_GM431946152.pdf
    • https://digilib.darmajaya.ac.id/repository/free-robux-without-verify_GM431946152.pdf
    • https://digilib.darmajaya.ac.id/repository/free-roblox-codes-2021-no-download_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e32.bin
661752fcbf156b7cf9a671c806b529828de3b3a7ef08daf6b953d07b223b677c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E32 21544 bytes
font_01_sfnt_off00005d5c.bin
ecac4b827e849319c0c5044e9321c91e8ddddd01a8be4fd48df7e18ba0227d57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D5C 17928 bytes

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