Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf3c4dfb09365107…

MALICIOUS

PDF

41.6 KB Created: 2021-04-23 12:21:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7034a5eaf6204f2041b733dee4ab37ce SHA-1: e597b1009f1ca319018ada29bea9b595c99946b2 SHA-256: bf3c4dfb09365107aac11f21f6912f85dfd75fc6a0e09d6531e80114f6deb4cb
102 Risk Score

Malware Insights

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

The PDF document contains a lure related to game hacking, specifically for Roblox, directing users to a suspicious URL. This URL, along with several others found within the document, likely serves as a gateway to malicious content or further exploitation. The ML classifier also strongly indicated maliciousness.

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.
  • 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://netsecure.top/app/431946152/how-to-hack-roblox-prison-life-on-chromebook-game-hack PDF link annotation
    • https://lamgiangservice.com/ckfinder/userfiles/files/hawt-sauce-roblox-jailbreak-hack.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/furky-safe-free-roblox-exploits.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/roblox-eploite-for-free-download.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/free-robux-generators-without-doing-gift-cards.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/earn-free-robux-by-completing-offers-and-surveys.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/lego-hacking-descargar-hack-roblox.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/easy-no-servay-free-robux.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/honey-free-roblox-robux-codes.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/roblox-cheat-free-robux.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/redeem-code-roblox-2021-free.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_off000042b8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x42B8 26780 bytes
SHA-256: 4e45b67489f7c2f593e209d5d1e1d483cfd10d4aecb6c4d951d38822f4a83e9e
font_01_sfnt_off00007efa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EFA 19044 bytes
SHA-256: dcc07635bb6900fadb0669790e977adee9ea7cea28339b29b46a26ed90621f1f

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