Malicious PDF — malware analysis report

Static analysis result for SHA-256 66eb6b026a69bff5…

MALICIOUS

PDF

41.6 KB Created: 2021-05-23 01:08:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5f0caaadffe921f3ddaa1dcf8397413a SHA-1: d214fd2270fcd8537281e1bd62d1ac02fd16f838 SHA-256: 66eb6b026a69bff58850b3b2a3f5b50ea248949e4e9773df6eb16fce1855ccfc
82 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and multiple other URLs that appear to be lures for game hacks and cheats. The presence of a 'download button' heuristic and a 'password archive lure' heuristic suggests the document is designed to trick the user into downloading and potentially decrypting a malicious payload. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7527

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/is-minecraft-bedrock-edition-free-game-hack
    • https://www.interiormurahjogja.com/ckfinder/userfiles/files/free-minecraft-alt-accounts_GM479516143.pdf
    • https://www.interiormurahjogja.com/ckfinder/userfiles/files/coin-master-free-spins-hack_GM406889139.pdf
    • https://www.interiormurahjogja.com/ckfinder/userfiles/files/how-to-hack-into-someones-roblox-account_GM431946152.pdf
    • https://www.interiormurahjogja.com/ckfinder/userfiles/files/free-robux-cards_GM431946152.pdf
    • https://www.interiormurahjogja.com/ckfinder/userfiles/files/80-free-spins-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000355d.bin
7e17c79de069985cc1be06b6f9de8e67502b5d6d54005c9628b202800bede361		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x355D 29100 bytes
font_01_sfnt_off00007750.bin
eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7750 2940 bytes
font_02_sfnt_off00008160.bin
c81a05c902e5b7336ce3afe221fe42e1a1247b419ae57a3dec90c8cc8a9629c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8160 18268 bytes

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