Malicious PDF — malware analysis report

Static analysis result for SHA-256 b09f0f1c3a3ee83a…

MALICIOUS

PDF

42.6 KB Created: 2021-05-12 04:01:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 91425e9e1384ea5edbe4b0c9c4c37239 SHA-1: 63ab3ae22015b6c3081fec69ced23e65544d1992 SHA-256: b09f0f1c3a3ee83a3c2723c360a31c5e8e4ffdc32572ed991cabe58d57b69cb3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document body and embedded URLs indicate a lure for free in-game items, directing users to potentially malicious sites. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a recovery secret lure further supports a malicious intent. No scripts were extracted, but the overall pattern suggests a phishing or malware distribution attempt.

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/free-spin-link-for-coin-master-game-hack
    • http://library.gkigadingserpong.org/repository/www-roblox-com-free-robux_GM431946152.pdf
    • http://www.library.gkigadingserpong.org/repository/roblox-hacked-com-2021_GM431946152.pdf
    • http://library.gkigadingserpong.org/repository/get-free-robux-no-human-verification_GM431946152.pdf
    • http://library.gkigadingserpong.org/repository/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdf
    • http://library.gkigadingserpong.org/repository/real-robux-generator-2021_GM431946152.pdf
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://www.library.gkigadingserpong.org/repository/minecraft-ps4-code-free_GM479516143.pdf
    • http://library.gkigadingserpong.org/repository/free-spins-coin-master-haktuts_GM406889139.pdf
    • http://library.gkigadingserpong.org/repository/how-to-get-free-robux-without-offers_GM431946152.pdf
    • http://library.gkigadingserpong.org/repository/free-pe_GM479516143.pdf
    • http://library.gkigadingserpong.org/repository/get-coin-master-free-spin_GM406889139.pdf
    • http://library.gkigadingserpong.org/repository/make-free-robux_GM431946152.pdf
    • http://www.library.gkigadingserpong.org/repository/free-2021-robux_GM431946152.pdf
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-shield_GM406889139.pdf
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-no-survey-or-verification_GM406889139.pdf
    • http://www.library.gkigadingserpong.org/repository/rbl-gg-free-robux_GM431946152.pdf
    • http://library.gkigadingserpong.org/repository/coin-master-hack-apk-2021-download_GM406889139.pdf
    • http://library.gkigadingserpong.org/repository/how-to-get-free-robux-without-verification_GM431946152.pdf
    • http://www.library.gkigadingserpong.org/repository/minecraft-net-download-free_GM479516143.pdf
    • http://library.gkigadingserpong.org/repository/free-robux-exe_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049c0.bin
7832fcaa3206009bea9cc38182fd13716ee6ffabd1102d949f12232cbf7eeb5c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49C0 25452 bytes
font_01_sfnt_off000084b9.bin
b406b504177f6b640bc1dbcd325e02770f8a0621b64b682f119f0b5c1d0e735d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84B9 18056 bytes

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