Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5188861968f896f…

MALICIOUS

PDF

45.1 KB Created: 2021-06-09 14:14:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1357fe32c21f625bae0561064bb06131 SHA-1: a9dc55a5bb2cc6efe27d9b875311d2fb82dab608 SHA-256: f5188861968f896fadda0bb1c3e8443f24c3edb0b385e972c1f264166ad00cf2
82 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and a call-to-action phrase, suggesting a lure to download further content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document may be instructing users to decrypt a password-protected archive, a common tactic to bypass security filters. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/how-to-get-free-old-roblox-accounts-game-hack
    • http://library.poltekkes-palangkaraya.ac.id//repository/robux-free-2021_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id//repository/cm-free-spins_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-robux-no-verification-2021-mobile_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/what-is-wurst_GM479516143.pdf
    • http://library.poltekkes-palangkaraya.ac.id//repository/coin-master-apk-mod_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id//repository/get-robux-today_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id//repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-robux-no-verify_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/pokemon-go-free-bot_GM1094591345.pdf
    • http://library.poltekkes-palangkaraya.ac.id//repository/mosttechs-coin-master-free-spins_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id//repository/coin-master-blogspot-links_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/roblox-free-hair-codes_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/rape-simulator_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/master-coin-free-spin_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id//repository/hack-coin-master-game_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id//repository/coin-master-hack-xyz-2021_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-robux-no-password_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id//repository/best-free-coin-master-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051e8.bin
bd24be1063f233fcc5aa997f4808cb1ed4985ee5403086362011fa5d4e4fc52d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51E8 26020 bytes
font_01_sfnt_off00008d00.bin
1f7b107cb671de97f67da6070c32b9f6d2a33b25b17cdd0085194ef9e6027bde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D00 18528 bytes

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