Malicious PDF — malware analysis report

Static analysis result for SHA-256 d54c86bc091643eb…

MALICIOUS

PDF

48.6 KB Created: 2021-06-09 15:11:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f0eda40e579f772c76b4ba35fc3c10d2 SHA-1: 54a9f88927db4ceaebcc3d42a8dbc857056344a0 SHA-256: d54c86bc091643ebef9eefedf073247d1e99256bc929220211b7cf2b115f6fbe
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt, a common lure to trick users into clicking malicious links. The embedded URL and numerous other URLs point to sites offering game-related cheats or hacks, suggesting a scam or malware distribution. While no scripts were directly extracted, the PDF structure and heuristics indicate it's designed to exploit user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/how-do-u-get-free-robux-witout-payig-game-hack PDF link annotation
    • http://behsanroshd.com/images/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://behsanroshd.com/images/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://behsanroshd.com/images/free-roblox-account-dump_GM431946152.pdfIn PDF document text
    • http://behsanroshd.com/images/free-robux-only-today-ad_GM431946152.pdfIn PDF document text
    • http://behsanroshd.com/images/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • http://behsanroshd.com/images/roblox-royalty-free-music_GM431946152.pdfIn PDF document text
    • http://behsanroshd.com/images/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://behsanroshd.com/images/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://behsanroshd.com/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://behsanroshd.com/images/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://behsanroshd.com/images/coin-master-hack-online-android_GM406889139.pdfIn PDF document text
    • http://behsanroshd.com/images/free-tix-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://behsanroshd.com/images/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • http://behsanroshd.com/images/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://behsanroshd.com/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://behsanroshd.com/images/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://behsanroshd.com/images/free-bucks-roblox_GM431946152.pdfIn PDF document text
    • http://behsanroshd.com/images/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
    • http://behsanroshd.com/images/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://behsanroshd.com/images/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fa7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FA7 25980 bytes
SHA-256: b0012e6323675f1a2b1e386356e6c963e97e5b19b4a5ca0878d74f6117999a01
font_01_sfnt_off00008c72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C72 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_02_sfnt_off00009683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9683 19804 bytes
SHA-256: b845d20eb47b7ee0653568a9207e7f524799ea54bfc77bd3b6b0c5104f5f93d4

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