Malicious PDF — malware analysis report

Static analysis result for SHA-256 25122c05eff70cc5…

MALICIOUS

PDF

45.0 KB Created: 2021-06-02 12:27:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 66d6347c997f73dbdcb076a2054c4eeb SHA-1: caae79de2154a052f4362e612abb1d865968c8ee SHA-256: 25122c05eff70cc51b6f2c982b5d16aaffd8cb9e13504dbfff1d0d92523016cd
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document displays a fake CAPTCHA lure, aiming to deceive the user into performing an action that likely leads to the download and execution of a secondary payload. The presence of multiple URLs, including one pointing to a 'cheat-roblox-dll-game-hack', strongly suggests a malicious intent to distribute malware. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/cheat-roblox-dll-game-hack PDF link annotation
    • http://firesafetyservices.biz/images/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://firesafetyservices.biz/images/minecraft-nintendo-switch-digital-code-free_GM479516143.pdfIn PDF document text
    • http://firesafetyservices.biz/images/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/tiktok-free-6-months_GM835599320.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-hack-using-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-free-raid-link_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/roblox-hacks-for-mac_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_off000050a4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50A4 25812 bytes
SHA-256: dbad25de080e79066f5d96771cd2965e9eb516b7dbd0076bd7285019ac435a7b
font_01_sfnt_off00008ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE5 18452 bytes
SHA-256: 39f289a0d2cfd036df7eea9251f07a768c3ee7bfbd4faebd514d9a0d506e11f8

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