Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcf9086b3755dc0b…

MALICIOUS

PDF

43.4 KB Created: 2021-05-11 23:00:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 46448c009d6404facb363f045023c6b5 SHA-1: 3f7537ba73776b136d59d905b74a81ced7db92f8 SHA-256: bcf9086b3755dc0b0a0bea10a0e2010177829720dcd0a32c8e6ae2dc9b351ef1
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for 'Free Robux' and other game-related cheats, directing users to download content from suspicious URLs. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs and a callback lure heuristic suggests a phishing or scam attempt. Although no scripts were explicitly extracted, the document's structure and embedded links indicate an intent to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-live-game-hack
    • http://library.umuslim.ac.id/repository/roblox-games-with-free-vip-servers_GM431946152.pdf
    • http://library.umuslim.ac.id//repository/minecraft-creative-mode-free_GM479516143.pdf
    • http://library.umuslim.ac.id/repository/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdf
    • http://library.umuslim.ac.id//repository/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • http://library.umuslim.ac.id//repository/coin-master-hack-2021-download_GM406889139.pdf
    • http://library.umuslim.ac.id//repository/coin-master-hack-review_GM406889139.pdf
    • http://library.umuslim.ac.id//repository/free-minecraft-java-account_GM479516143.pdf
    • http://library.umuslim.ac.id//repository/hackear-coin-master_GM406889139.pdf
    • http://library.umuslim.ac.id/repository/avatar-the-last-airbender-roblox_GM431946152.pdf
    • http://library.umuslim.ac.id/repository/free-bedrock-minecraft_GM479516143.pdf
    • http://library.umuslim.ac.id//repository/haktuts-2021-coin-master-free-spin-link_GM406889139.pdf
    • http://library.umuslim.ac.id//repository/free-robux-glitch_GM431946152.pdf
    • http://library.umuslim.ac.id//repository/safe-hack-for-coin-master-android_GM406889139.pdf
    • http://library.umuslim.ac.id/repository/coin-hackhub-coin-master_GM406889139.pdf
    • http://library.umuslim.ac.id/repository/master-coin-free-spin-daily_GM406889139.pdf
    • http://library.umuslim.ac.id//repository/how-to-get-minecraft-for-free-on-mac_GM479516143.pdf
    • http://library.umuslim.ac.id//repository/robux-websites-that-work_GM431946152.pdf
    • http://library.umuslim.ac.id//repository/free-spins-coin-master-2021-hack_GM406889139.pdf
    • http://library.umuslim.ac.id/repository/where-to-get-free-robux_GM431946152.pdf
    • http://library.umuslim.ac.id/repository/free-robux-working_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bba.bin
32934f53840b66a6737964073812f97b409abb1d9432adc6a192417ad3b8db87		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BBA 25972 bytes
font_01_sfnt_off00008799.bin
2e5a72f8344bcf9b425e9fd022f0a9c5c2029812f1a4b00ba9f2a8ee504eb572		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8799 18248 bytes

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