Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9a8ff35922e48b3…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 13:59:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6a79962a6120b03876e0d508a577342c SHA-1: cf06e8c0cc39a2ba3304ee2355643e55f00ecb27 SHA-256: c9a8ff35922e48b3826de98ee46606026d5c47b17158b704289cff83c2364376
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a visual lure suggesting a download. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates that the document likely instructs the user to provide a password for an archive, a common tactic to bypass security filters. The ML classifier also flagged this PDF as malicious. The primary URL points to a resource related to game cheats, reinforcing the scam or phishing nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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.online/app/406889139/coin-master-invite-friends-free-spins-game-hack
    • http://www.library.umbjm.ac.id/repository/what-tiktok-free-followers_GM835599320.pdf
    • http://www.library.umbjm.ac.id/repository/roblox-robux_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/free-spins-for-coin-master-ios_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/free-spins-and-coins-coin-master_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/get-coin-master-hack_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/roblox-prison-life-hack_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/hack-coin-master-1_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-pro-gamers-com_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/coin-master-game-free-play-online_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/free-robux-offers_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/blogspot-free-spins-coin-master_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/daily-spin-and-coin_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/master-coin-free-link_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/free-coin-master-gifts_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/robux-hack-2021_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/roblox-password-hacker_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/robux-generator-without-human-verification-2021_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/best-free-minecraft-skins_GM479516143.pdf
    • http://www.library.umbjm.ac.id/repository/coin-master-free-gift-cards_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/daily-coin-master-free-spin-link-facebook_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f7e.bin
f83ba5b804f6ede0e8ad7a488b2154cc7506e6c942a46938134b9eb1c61c2b9d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F7E 24124 bytes
font_01_sfnt_off000086b5.bin
9d03f7c6c62ba3e7fdc0441e9d982a863b2b60b781165d6920512f68ecc4a440		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86B5 3560 bytes
font_02_sfnt_off0000933c.bin
894a1adcc26929d36602ddbdb38684ee1c59a25b9ea4d8d8786e8c61a01daafb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x933C 18172 bytes

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