Malicious PDF — malware analysis report

Static analysis result for SHA-256 c25282bd81231fd3…

MALICIOUS

PDF

42.0 KB Created: 2021-05-16 05:07:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 905b9f123a3599c78adb9b675e74bd65 SHA-1: c4df9f686bbf20a9ef8fafaeeaf0f26ce9e03e50 SHA-256: c25282bd81231fd3243ebceb4216c3f749c5cbbbe8c6863d4786357f5f034cb2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a visual lure suggesting a download, likely to trick users into downloading a malicious payload. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates that the document may be instructing the user to decrypt a password-protected archive, a common tactic to evade static analysis. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-free-game-hack PDF link annotation
    • http://www.mostraining.co.za/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://www.mostraining.co.za/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.mostraining.co.za/images/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • http://www.mostraining.co.za/images/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/mcpe-download_GM479516143.pdfIn PDF document text
    • http://www.mostraining.co.za/images/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.mostraining.co.za/images/get-robux-com_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/coin-master-cheats-free-spins_GM406889139.pdfIn PDF document text
    • http://www.mostraining.co.za/images/wwwcoin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.mostraining.co.za/images/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://www.mostraining.co.za/images/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://www.mostraining.co.za/images/coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://www.mostraining.co.za/images/real-robux_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/free-robux-no-generator_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
font_00_sfnt_off00004a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A06 25468 bytes
SHA-256: ab4f038c75e5afef4ec5c04c855e94e73cdca3dca80378a23f962b46c499559a
font_01_sfnt_off000083f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83F4 17568 bytes
SHA-256: 2778e064ee8e4e3a4bd3984a17bb7eaaeefaa41a67eb131b8ade69fe1653bbfc

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