Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3cdb89193a8cb13…

MALICIOUS

PDF

45.4 KB Created: 2021-05-13 20:39:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f6a51d53a9da365fdb99ee10eb8e18df SHA-1: c731baa4032ad0f09e8f99726178ef8907014e0f SHA-256: d3cdb89193a8cb132ace2a0bfd5578d45f860c090f4cd9f9368ecce4d0c239e3
142 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick the user into clicking a link, which is a common social engineering tactic. The embedded URL leads to a site offering game hacks, further supporting the lure. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/free-coin-and-spin-link-game-hack
    • http://www.ma-hidayatulinsanpky.online/__statics/gudangsoal/files/free-robux-websites-that-actually-work-2021_GM431946152.pdf
    • http://www.ma-hidayatulinsanpky.online/__statics/gudangsoal/files/how-to-get-free-robux-hack-2021_GM431946152.pdf
    • http://www.ma-hidayatulinsanpky.online/__statics/gudangsoal/files/hacks-and-cheats-for-coin-master_GM406889139.pdf
    • http://www.ma-hidayatulinsanpky.online/__statics/gudangsoal/files/how-to-get-free-robux-without-email_GM431946152.pdf
    • http://www.ma-hidayatulinsanpky.online/__statics/gudangsoal/files/100-free-spins-coin-master_GM406889139.pdf
    • http://www.ma-hidayatulinsanpky.online/__statics/gudangsoal/files/free-coins-and-free-spins-coin-master-2021_GM406889139.pdf
    • http://www.ma-hidayatulinsanpky.online/__statics/gudangsoal/files/bux-free-robux_GM431946152.pdf
    • http://www.ma-hidayatulinsanpky.online/__statics/gudangsoal/files/wahoogaming-co-free-robux_GM431946152.pdf
    • http://ma-hidayatulinsanpky.online/__statics/gudangsoal/files/free-robux-codes-no-verification-2021_GM431946152.pdf
    • http://www.ma-hidayatulinsanpky.online/__statics/gudangsoal/files/free-robux-codes-2021-not-used_GM431946152.pdf
    • http://www.ma-hidayatulinsanpky.online/__statics/gudangsoal/files/hacked-roblox-game_GM431946152.pdf
    • http://ma-hidayatulinsanpky.online/__statics/gudangsoal/files/free-spins-coin-master-blogspot_GM406889139.pdf
    • http://ma-hidayatulinsanpky.online/__statics/gudangsoal/files/how-to-get-free-robux-without-any-verification_GM431946152.pdf
    • http://www.ma-hidayatulinsanpky.online/__statics/gudangsoal/files/minecraft-ps4-free_GM479516143.pdf
    • http://www.ma-hidayatulinsanpky.online/__statics/gudangsoal/files/coin-master-free-spins-and-coins-app_GM406889139.pdf
    • http://www.ma-hidayatulinsanpky.online/__statics/gudangsoal/files/free-robux-youtube_GM431946152.pdf
    • http://www.ma-hidayatulinsanpky.online/__statics/gudangsoal/files/minecraft-realms-free-trial_GM479516143.pdf
    • http://www.ma-hidayatulinsanpky.online/__statics/gudangsoal/files/coin-master-free-spins-hack-without-human-verification_GM406889139.pdf
    • http://www.ma-hidayatulinsanpky.online/__statics/gudangsoal/files/how-to-get-free-hair-in-roblox_GM431946152.pdf
    • http://www.ma-hidayatulinsanpky.online/__statics/gudangsoal/files/how-to-download-minecraft-for-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d3c.bin
9df1df90faa52958ba621efc343432585e03a90194755f8b8a6b590c951fe609		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D3C 25260 bytes
font_01_sfnt_off00008667.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8667 2840 bytes
font_02_sfnt_off00009019.bin
d4766dae7958252991ea9c600ec63f9574658937c72f1ba15e00730ea5da47af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9019 17896 bytes

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