Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bf1852efe9fd41e…

MALICIOUS

PDF

42.0 KB Created: 2021-05-01 18:07:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0724227b8f7a3c6bae95ba5ba9d99455 SHA-1: 0461ccab4258cfe12756c6368be7a76005749705 SHA-256: 4bf1852efe9fd41e73a95d2540d8e02d920bfc1562bf2e09b7c24347313c0b1c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks, specifically mentioning Roblox, and directs users to a malicious URL. The ML classifier strongly flagged this PDF as malicious. The document body contains obfuscated text and multiple URLs pointing to potentially malicious content, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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/free-item-codes-roblox-game-hack PDF link annotation
    • https://fridaytravelnepal.com/userfiles/files/hack-roblox-jump.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-free-hack-download.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-without-verification-or-survey.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-denis-shirt-roblox.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/diamond-roblox-hack-jailbreak.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-free-robux-on-roblox-2021-june.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-free-robux-on-xbox-one.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-300-robux-on-roblox-free.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/john-doe-roblox-hacking.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/lego-hack-download-roblox.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_off000040d4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x40D4 28812 bytes
SHA-256: a0d024741883e38ad62fbc04a602debe16baf5d2d1f077afddbe5ea2f8f42a61
font_01_sfnt_off00008208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8208 18488 bytes
SHA-256: 5e12ca21000aaf689545fd69c6b35730986085b482848dba8de0ceb47a8da3ad

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