Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ef7c23bee4524b2…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 08:41:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 210572c4d5a450b357c26a7b9f45751f SHA-1: af6bb6671c8c77d698cf7f14ad85bf3571024c99 SHA-256: 2ef7c23bee4524b2ca9529cabc5e4cc93a00394122772c8e5bf228ade46ed5c5
82 Risk Score

Malware Insights

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

The document contains a lure for downloading a file, indicated by the 'SE_DOWNLOAD_BUTTON' heuristic and the presence of embedded URLs. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the user is prompted to handle a password-protected archive, likely to conceal a malicious payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.online/app/479516143/how-to-get-minecraft-for-free-on-iphone-game-hack PDF link annotation
    • http://opac.kolejkrim.edu.my/repository/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/grab-points-login_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-tiradas-gratis-link_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-daily-free-link_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/where-can-i-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-games-free_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-robux-with-no-verification_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_004_off0000562d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x562D 26784 bytes
SHA-256: 50103c38bbfb93fa013204db6947e006c6bccf974f1f8bd7d4d0d09301a59c51
font_01_sfnt_off000093ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93EE 18216 bytes
SHA-256: bed6c76176a434f358ebc88a31d2dbe88cb1547cd8758d4c9ade2f80066016aa

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