Malicious PDF — malware analysis report

Static analysis result for SHA-256 a13ed0c5db9916d5…

MALICIOUS

PDF

36.2 KB Created: 2021-05-23 00:36:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7e46fd0ebda2aed98f5e59066ccba1de SHA-1: 1bb50eab2ffb047b360fc97932851b8d8cc93687 SHA-256: a13ed0c5db9916d50bede4ba9338391f6210a779cbf3c68d049c7f2d1163659e
82 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and a prominent call-to-action to download a file, disguised as a way to get free in-game items. The ML classifier strongly flagged this PDF as malicious, and the presence of a remote-support lure heuristic further indicates a malicious intent to trick the user into downloading and potentially executing a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/how-to-get-free-minecraft-skins-game-hack
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdf
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/how-to-create-a-minecraft-server-for-free_GM479516143.pdf
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdf
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/rewards-roblox_GM431946152.pdf
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/how-can-you-get-free-spins-on-coin-master_GM406889139.pdf
    • https://sigmaclient.info#2
    • https://flux.today#3
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000034a7.bin
06cd231109a10df30b2fc21126b304c21a7bfcd456248a8e38cfda8e805eb072		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34A7 24836 bytes
font_01_sfnt_off00006cde.bin
2e9033515f3ff21116dec08c3b5b633a0403805954c28c410ec38fa0176f1df4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDE 18044 bytes

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