Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad53c931d920c6c3…

MALICIOUS

PDF

35.4 KB Created: 2021-05-23 23:48:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 83add497456957c588741de761786232 SHA-1: 561caffaf682c6bbe1156c4ad8b3c5ac0dfc0af3 SHA-256: ad53c931d920c6c360ec6e62b13ad4acd9b21ac4a52e4a0637f73e42da315033
82 Risk Score

Malware Insights

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

The PDF contains a lure for "free Robux" and displays a fake CAPTCHA to trick the user into interacting with a malicious link. The embedded URL and other URLs point to sites offering game hacks or cheats, reinforcing the phishing pretext. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/www-free-robux-game-hack PDF link annotation
    • http://bau-lk.de/images/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://bau-lk.de/images/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://bau-lk.de/images/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://bau-lk.de/images/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://bau-lk.de/images/coin-master-hack-spin_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3244 23952 bytes
SHA-256: f42318146e92d8f3c6dd07aadd260958c884786756660cf24884e26f193f0597
font_01_sfnt_off00006872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6872 18376 bytes
SHA-256: 3afa3067d1f3c9d8d4e5028784d7d2a7352a3b977a914758f486701e4d265e0a

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