Malicious PDF — malware analysis report

Static analysis result for SHA-256 b92b3eb2d7c259a9…

MALICIOUS

PDF

45.0 KB Created: 2021-05-19 19:42:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 654c42aa017c3088569730a338329a31 SHA-1: 966f4452d3e6d324d93aff1f4d187cd058d5f700 SHA-256: b92b3eb2d7c259a9324bb7ff58a36a5f8d0544380d644d28318bc55eac75a8cf
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains a lure for 'Free Robux' and game hacks, directing users to download files from external URLs. The presence of embedded URLs and a high ML classifier score indicate malicious intent. While no scripts were directly extracted, the document's structure and embedded links suggest it's designed to facilitate the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/free-robux-real-working-game-hack
    • http://advancedaudiosystems.org/images/coin-master-35-2-hack_GM406889139.pdf
    • http://advancedaudiosystems.org/images/coin-master-hack-mod-apk-free-download_GM406889139.pdf
    • http://advancedaudiosystems.org/images/free-spins-and-coins-coin-master-app_GM406889139.pdf
    • http://advancedaudiosystems.org/images/coinmasterfreespinlink_GM406889139.pdf
    • http://advancedaudiosystems.org/images/coin-master-links-free-spins_GM406889139.pdf
    • http://advancedaudiosystems.org/images/coin-master-100-spin-hack_GM406889139.pdf
    • http://advancedaudiosystems.org/images/how-to-block-someone-on-coin-master_GM406889139.pdf
    • http://advancedaudiosystems.org/images/robux-free-gift-card-org-hack_GM431946152.pdf
    • http://advancedaudiosystems.org/images/will-minecraft-ever-be-free_GM479516143.pdf
    • http://advancedaudiosystems.org/images/coin-master-free-spin-download_GM406889139.pdf
    • http://advancedaudiosystems.org/images/minecraft-java-for-free_GM479516143.pdf
    • http://advancedaudiosystems.org/images/roblox-hack-game_GM431946152.pdf
    • http://advancedaudiosystems.org/images/minecraft-nintendo-switch-digital-code-free_GM479516143.pdf
    • http://advancedaudiosystems.org/images/coin-master-gift-link_GM406889139.pdf
    • http://advancedaudiosystems.org/images/coin-master-hack-https-coinms-net_GM406889139.pdf
    • http://advancedaudiosystems.org/images/whats-robux_GM431946152.pdf
    • http://advancedaudiosystems.org/images/coin-master-gold-cards-hack_GM406889139.pdf
    • http://advancedaudiosystems.org/images/free-minecraft-skin-packs_GM479516143.pdf
    • http://advancedaudiosystems.org/images/how-to-get-free-robux-on-phone-2021_GM431946152.pdf
    • http://advancedaudiosystems.org/images/coin-master-hack-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048cd.bin
26dfb9c3cf09a442467d54caf6ceb56e686d234a45a2e2957d47b4b56a49f561		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48CD 30712 bytes
font_01_sfnt_off00008b4d.bin
e9cbc94ede6f039b2d64cc554d217f5f9744837c58519873c9f71b22e801d63e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4D 19092 bytes

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