Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d2da436cf9886a…

MALICIOUS

PDF

39.8 KB Created: 2021-04-29 07:38:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f75bd20edb9c471043262e46cceee88c SHA-1: 5ff9e56f047555af2d332fc843a99565805daf6c SHA-256: 94d2da436cf9886a4a1cbb467718cf3606af303ca3f53024ae230d9d6c395d43
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering game hacks and generators, identified as a lure for malicious redirection. The heuristic PDF_GAME_HACK_REDIRECT_LURE specifically flags this behavior. While no scripts were extracted, the embedded URLs and the nature of the lures suggest an attempt to direct the user to potentially malicious content or further download stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/how-to-hack-in-games-roblox-game-hack In PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/free-robux-gamer.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/hack-roblox-account-kali-linux.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/how-to-hack-roblox-games-with-artmoney.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/roblox-royale-high-diamond-hack-no-human-verification.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/cheat-scp-roblox.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/speed-city-roblox-hack.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/nike-shirt-roblox-free.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/roblox-hack-mining-simulator-rebhirt.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/como-ser-fuerte-en-boxing-simulator-2-roblox-cheat.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/promo-codes-for-free-robux-on-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_off00004142.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4142 24280 bytes
SHA-256: 68999a0107e85b16fa7dfde8fe5ebf792345707f319a54b79cd666f0d536d28e
font_01_sfnt_off000078bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78BB 18608 bytes
SHA-256: f2d753bda0166fe1bb1b8c1e62b8ac5384f8dd1c0eedbdb07a0a6a2e2ad46c0f