Malicious PDF — malware analysis report

Static analysis result for SHA-256 245c8537d718b5a3…

MALICIOUS

PDF

44.7 KB Created: 2021-05-17 03:42:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f31aa97887cce449c29106de236dd0e7 SHA-1: 5c12aec21c5379f02d4c5f0fd2bd204811f51200 SHA-256: 245c8537d718b5a3f819b99fa1c3d2ce9c7b65f7b417390ea282c79550e44d90
82 Risk Score

Malware Insights

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

The PDF document contains a lure for a free game and a remote support tool, indicating a social engineering attempt to trick the user into downloading a payload. The presence of an external URI pointing to a suspicious domain further supports this malicious intent. No scripts were extracted, but the overall structure and heuristics suggest a downloader or dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 4

  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.xyz/app/479516143/play-minecraft-for-free-game-hack
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdf
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-no-human-verification_GM406889139.pdf
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/roblox-sign-in-free_GM431946152.pdf
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/coin-master-link-spin_GM406889139.pdf
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/minecraft-windows-10-hacked-client_GM479516143.pdf
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-october-2021_GM406889139.pdf
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/roblox-2021_GM431946152.pdf
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/roblox-dominus-free_GM431946152.pdf
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/free-robux-legit_GM431946152.pdf
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/cheating-hacks-for-coin-master_GM406889139.pdf
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-on-coin-master_GM406889139.pdf
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/coin-master-mod-apk-free-download-for-android_GM406889139.pdf
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/tryrbx-site-free-robux_GM431946152.pdf
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-only_GM406889139.pdf
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdf
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/free-coins-and-spins-in-coin-master_GM406889139.pdf
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/hey-google-how-do-you-get-free-robux_GM431946152.pdf
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/how-to-play-minecraft-for-free-on-computer_GM479516143.pdf
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-no-generator_GM406889139.pdf
    • http://e-learning.mtsnegeri1kabtangerang.sch.id/__statics/gudangsoal/files/coin-master-redeem-code-free_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c0a.bin
8266dca793f625b740a8805f2c0f2ce1e728c72f399cf5c5a133b96884a6cfda		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C0A 23872 bytes
font_01_sfnt_off00008232.bin
3811f2fb1880daf4953efcc9c7427d9b438bced237490b00be4a6ec3ecea79e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8232 3092 bytes
font_02_sfnt_off00008cdc.bin
58506b39f0592aa293a22e76cdd5d8324130a94bf097dc81d26ff216ea8060f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDC 18116 bytes

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