Malicious PDF — malware analysis report

Static analysis result for SHA-256 85eb1b67265a7368…

MALICIOUS

PDF

42.6 KB Created: 2021-04-30 10:27:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d4c25929df8eebf32054a2e778de0eaa SHA-1: e2bcdadb9531326bfd2d1ec9ab15bf45ae410f13 SHA-256: 85eb1b67265a73686a543c739e17de8c8c1547ddacbdc2b4c48b8f9725f265fc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector at `https://netcdn.xyz/app/431946152/descargar-qtx-hack-roblox-game-hack`. The document body and heuristics indicate a lure related to game hacks and free in-game currency, likely intended to trick users into downloading further malware or visiting malicious sites. The presence of embedded URLs and the nature of the lure suggest a phishing or social engineering attack.

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/descargar-qtx-hack-roblox-game-hack In PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/best-free-items-in-roblox.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/how-to-get-free-robux-dylan-grant.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/how-to-earn-free-robux-without-human-verification.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/how-to-get-free-robux-that-actually-works.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/free-robux-urban.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/como-tener-hacks-en-roblox-prison-life.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/how-to-hack-case-clicker-roblox.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/how-to-hack-roblox-jailbreak-for-vip-server.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/how-to-get-a-free-roblox-gift-card-code-pastebin.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_off00004197.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4197 28804 bytes
SHA-256: b25305e984c689286eb667304c24f2a868de595c0b3ad189ad370e225a835594
font_01_sfnt_off000082b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82B7 18900 bytes
SHA-256: c6fb5876cad9f491d02ca9673973116ac8f91a895efd8b2a5b29b79de2b8d176