Malicious PDF — malware analysis report

Static analysis result for SHA-256 f44d0ea7af70f8b2…

MALICIOUS

PDF

41.9 KB Created: 2021-05-15 16:34:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a62012e2cfdb7bbcb0babf1d478464e2 SHA-1: 4137406fdeb54ddd93a7329f3951b52759730978 SHA-256: f44d0ea7af70f8b255458789ec4f35a41eacf1850d78ead4c06d10cb8393d5f8
102 Risk Score

Malware Insights

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

The document contains multiple embedded URLs and a heuristic firing for a 'Recovery secret / private key request' lure, indicating an attempt to trick users into revealing sensitive information or downloading further malicious content. The ML classifier also strongly flagged this PDF as malicious. The primary URL points to a site offering hacks for online games, a common pretext for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/406889139/coin-master-online-game-hack
    • http://julo-it.net/images/roblox-free-online-game_GM431946152.pdf
    • http://julo-it.net/images/body-roblox_GM431946152.pdf
    • http://julo-it.net/images/coin-master-free-spins-generator-no-human-verification_GM406889139.pdf
    • http://julo-it.net/images/free-robux-only-1-step_GM431946152.pdf
    • http://julo-it.net/images/robux-generator-no-verification-2021_GM431946152.pdf
    • http://julo-it.net/images/how-can-you-get-free-spins-on-coin-master_GM406889139.pdf
    • http://julo-it.net/images/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdf
    • http://julo-it.net/images/free-robux-without-verification-2021_GM431946152.pdf
    • http://julo-it.net/images/roblox-executor-free_GM431946152.pdf
    • http://julo-it.net/images/how-to-get-free-robux-fast-and-easy_GM431946152.pdf
    • http://julo-it.net/images/bloxpage-free-robux_GM431946152.pdf
    • http://julo-it.net/images/coin-master-free-spins-moonactive_GM406889139.pdf
    • http://julo-it.net/images/coin-master-reward-link-2021_GM406889139.pdf
    • http://julo-it.net/images/how-to-get-free-robux-on-mobile_GM431946152.pdf
    • http://julo-it.net/images/coin-master-free-spins-and-free-coins_GM406889139.pdf
    • http://julo-it.net/images/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdf
    • http://julo-it.net/images/flip-master-coins-hack_GM406889139.pdf
    • http://julo-it.net/images/coin-master-daily-free-cards_GM406889139.pdf
    • http://julo-it.net/images/coin-master-free-spins-app_GM406889139.pdf
    • http://julo-it.net/images/play-minecraft-free-online-no-download_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004927.bin
b0c109e1fb0df321cf163f14ebfa17033b2128d89954d9243a060fd3f4d68ee3		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4927 25284 bytes
font_01_sfnt_off0000837a.bin
869d7695d274e208c7f4dfde8f160970e62420a8a3a2b9cf02de0f643df516c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x837A 17620 bytes

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