Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c5cb7bf6d0beda8…

MALICIOUS

PDF

43.4 KB Created: 2021-05-13 14:37:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3b6fbee89d31aaab386214a86b854d8e SHA-1: 203580431b80bfd22cb95866d108609e8b0ea95f SHA-256: 3c5cb7bf6d0beda8d6d5b505e2ae5a8abf8f360887c6ccce6bba2a32b3373bf8
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 'secret recovery' lure, indicating an attempt to trick the user into revealing sensitive information or downloading malware. The ML classifier also strongly flagged this PDF as malicious. The primary URL points to a 'robux gainer game hack', suggesting a scam or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/robux-gainer-game-hack PDF link annotation
    • http://www.adravietnam.org/images/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://adravietnam.org/images/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://adravietnam.org/images/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/hackear-coin-master-android_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • http://adravietnam.org/images/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • http://adravietnam.org/images/mcpe_GM479516143.pdfIn PDF document text
    • http://adravietnam.org/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.adravietnam.org/images/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://www.adravietnam.org/images/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://adravietnam.org/images/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/coin-master-3rd-village-free-2021-gift-card_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://www.adravietnam.org/images/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.adravietnam.org/images/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a03.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A03 26544 bytes
SHA-256: fb4b7eb6bafafe7b2603c30a22edaf1c8151d814620b17aee1f9c8cc8bcfa3b3
font_01_sfnt_off0000879b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x879B 18200 bytes
SHA-256: b49f4983386c5e2433966410528fc3ba3932a5551bf841ef6afc48143acf477f

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