Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9f3f584df0d32b6…

MALICIOUS

PDF

48.0 KB Created: 2021-05-21 20:06:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0e20eb5fab9becdef19ad4f2c5156107 SHA-1: ca88fd54187ea5dbbe5bf52b0845f44edcbe9bed SHA-256: f9f3f584df0d32b63d744f01264c5841daa3e9919bf024597a6b3aa98c32d2fd
82 Risk Score

Malware Insights

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

The PDF contains an embedded URL and text that mimics a download link for a game, likely to trick users into downloading malware. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests a common tactic to bypass security filters by instructing the user to provide a password for an encrypted payload, further indicating a malicious intent. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7778

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/479516143/minecraft-pe-apk-download-free-0.15-0-game-hack PDF link annotation
    • http://zarinnameh.ir/images/earn-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/haktuts-coin-master_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/grab-points-login_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/coin-master-free-redeem-code_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3713 25036 bytes
SHA-256: 0d6045e12c9db9c0f65ced408e0aff77c2635abba6166b1c80bcdeb55f7a47cd
font_01_sfnt_off00006fa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA9 7936 bytes
SHA-256: 218d53b68bdddb064f6fba4be822d5b3725ed1cef1a3b42796a8dd99c4a62f4e
font_02_sfnt_off000088d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88D3 4232 bytes
SHA-256: ab6320ab342704d2c5943abfba82ed4837bf2da871c91621741fd4cfd15c6ed5
font_03_sfnt_off00009760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9760 19268 bytes
SHA-256: 28dc74618e8b02129b424bb36b85fc5c3aa5d44cc182401491d55e46ac5e52ed

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