Malicious PDF — malware analysis report

Static analysis result for SHA-256 1249510d72df0354…

MALICIOUS

PDF

43.4 KB Created: 2021-05-14 15:38:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 058f71825c9906bf9eb9bd6507fbf168 SHA-1: 661f5b543073aeeb7fbabb186aac2ba3713cd5a9 SHA-256: 1249510d72df0354fb464fe1db5ca1183a53d1e6ab027eac811c22768be693ff
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure promising free Robux, a common tactic for distributing malware. It includes an external URI pointing to a suspicious domain, and multiple embedded URLs that likely lead to further malicious content or downloads. The ML classifier strongly flagged this PDF as malicious, supporting the observed lure and URL findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/how-to-get-free-robux-game-hack PDF link annotation
    • http://akvamaster.com.ua/images/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://akvamaster.com.ua/images/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://akvamaster.com.ua/images/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://akvamaster.com.ua/images/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://akvamaster.com.ua/images/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://akvamaster.com.ua/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://akvamaster.com.ua/images/free-robux-master_GM431946152.pdfIn PDF document text
    • http://akvamaster.com.ua/images/coun-master_GM406889139.pdfIn PDF document text
    • http://akvamaster.com.ua/images/fb-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://akvamaster.com.ua/images/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://akvamaster.com.ua/images/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://akvamaster.com.ua/images/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://akvamaster.com.ua/images/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://akvamaster.com.ua/images/roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • http://akvamaster.com.ua/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://akvamaster.com.ua/images/archery-master-3d-coins-hack_GM406889139.pdfIn PDF document text
    • http://akvamaster.com.ua/images/coin-master-offline-hack_GM406889139.pdfIn PDF document text
    • http://akvamaster.com.ua/images/avatar-the-last-airbender-roblox_GM431946152.pdfIn PDF document text
    • http://akvamaster.com.ua/images/do-robux-generators-work_GM431946152.pdfIn PDF document text
    • http://akvamaster.com.ua/images/how-to-get-a-lot-of-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_off00004a6d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A6D 27272 bytes
SHA-256: 6f4e572f1c7f387428d445ced8bc37480b3957f8cb13dad9895e2c3e9d567987
font_01_sfnt_off00008765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8765 18280 bytes
SHA-256: 2eeeedfcb2f224ab556fa0ab031baeab03f86dcbcf90e3baaaf5b6d88536dec3

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