Malicious PDF — malware analysis report

Static analysis result for SHA-256 c80ad67f42e7d315…

MALICIOUS

PDF

45.5 KB Created: 2021-05-13 11:01:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 931bf87e400df0785dc72d6e75d8c5fe SHA-1: 525e81c1c8511f41f5631fe8d9c0a5a8422d72b0 SHA-256: c80ad67f42e7d315102eba0e6a01542cfa85814e78d24a5ae24c0f73843a2ed3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains a lure for game rewards and requests recovery secrets, indicating a phishing or scam attempt. It embeds external URIs pointing to potentially malicious content, and the ML classifier strongly flagged it as malicious. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to external sites for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/coin-master-free-rewards-link-game-hack
    • http://gaeconsultores.cl/images/cm-free-spins_GM406889139.pdf
    • http://gaeconsultores.cl/images/no-scam-free-robux_GM431946152.pdf
    • http://gaeconsultores.cl/images/free-robux-gift-card-codes-2021_GM431946152.pdf
    • http://gaeconsultores.cl/images/free-spins-for-coin-master-ios_GM406889139.pdf
    • http://gaeconsultores.cl/images/free-robux-hack-generator_GM431946152.pdf
    • http://gaeconsultores.cl/images/free-robux-download_GM431946152.pdf
    • http://gaeconsultores.cl/images/free-spins-coin-master-without-survey_GM406889139.pdf
    • http://gaeconsultores.cl/images/robux-hack-no-verification_GM431946152.pdf
    • http://gaeconsultores.cl/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • http://gaeconsultores.cl/images/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdf
    • http://gaeconsultores.cl/images/coin-master-game-hack-app-download_GM406889139.pdf
    • http://gaeconsultores.cl/images/coin-master-free-redeem-code_GM406889139.pdf
    • http://gaeconsultores.cl/images/inappropriate-roblox-games_GM431946152.pdf
    • http://gaeconsultores.cl/images/coin-master-free-coins-hack_GM406889139.pdf
    • http://gaeconsultores.cl/images/free-robux-no-download_GM431946152.pdf
    • http://gaeconsultores.cl/images/free-robux-codes-2021_GM431946152.pdf
    • http://gaeconsultores.cl/images/funbloxxyz-free-robux_GM431946152.pdf
    • http://gaeconsultores.cl/images/coin-master-free-spins-and-free-coins_GM406889139.pdf
    • http://gaeconsultores.cl/images/roblox-executor-free-download_GM431946152.pdf
    • http://gaeconsultores.cl/images/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bd6.bin
2cd6d77ac84b695eeeb927d148c0b605d70801189a4bef0f3b059e9e950f4a7a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BD6 30644 bytes
font_01_sfnt_off0000900b.bin
658cfe6ea68dc33f1c61864f727cf80d605750a91b73f2c3ad1e1c3c3fde56a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x900B 18216 bytes

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