Malicious PDF — malware analysis report

Static analysis result for SHA-256 df8e65db3aa3f08e…

MALICIOUS

PDF

41.2 KB Created: 2021-05-17 23:02:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f978f5dfde0752ad6b8bb14aed6475c4 SHA-1: 6625d0468427e14a3c8d1e38cbe015d15d803491 SHA-256: df8e65db3aa3f08ed0e7975e38f70a0294a668245baffcd504e665600d61d2af
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document contains a lure for free spins for Coin Master, a popular game, and includes a call-to-action button. It also explicitly requests recovery secrets or private keys, indicating a phishing or scam attempt. The embedded URLs likely lead to the download of a malicious payload, such as a game hack or exploit.

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/get-free-spins-coin-master-2021-game-hack PDF link annotation
    • http://calavera.be/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/coin-master-hack-online-pc_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/minecraft-win-10-free_GM479516143.pdfIn PDF document text
    • http://calavera.be/images/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/robux-com-free-robux_GM431946152.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_off00004798.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4798 24588 bytes
SHA-256: 4c27325d6a332d34dccae722977d0960a90e3a24642dfdf4a3408ab6b75fcfe9
font_01_sfnt_off00007e70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E70 18288 bytes
SHA-256: b38ddf3080d7f2bc752da259c3b03eae0df146b085052c6419baf797dcf0dadb

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