Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a9cc602a1a173ff…

MALICIOUS

PDF

40.1 KB Created: 2021-04-25 02:37:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ecbb24e0ad547b9a0be02d5439389342 SHA-1: 5469951a12fe8b4dc1f3bbb0dcd3dea8c45411cc SHA-256: 6a9cc602a1a173fff30ff94e7c25dc069ec4d9a4a7fb8b87cee0ed222b26c827
160 Risk Score

Malware Insights

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

The PDF contains multiple embedded links that redirect to malicious infrastructure, specifically promoting game hacks and free items for Roblox. The primary redirector URL is associated with known malicious activity. The document body, though partially corrupted, contains references to game hacks and URLs, reinforcing the lure. The presence of multiple malicious links and the ML classifier's high confidence score indicate a high likelihood of this document being used for malicious redirection.

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/hack-prison-life-roblox-game-hack In PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/roblox-system32-host-file-hack.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/free-modded-roblox-accounts.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/aimbot-hacks-for-roblox-code.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/roblox-boss-mania-hack.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/roblox-new-free-items-2021.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/rollercoaster-tycoon-2-cheats-roblox.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/roblox-no-human-verification-hack.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-hack-ipad.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/how-to-cheat-in-weight-lifting-in-roblox.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/como-poner-hacks-en-roblox-cs-go.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_off00003f86.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3F86 25844 bytes
SHA-256: d8e82a70cc0899fc5169805930853db24415717bc1616b236ad190df265ea23d
font_01_sfnt_off00007a77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A77 18456 bytes
SHA-256: ec1485b626ce6c243ecd523283ca7ed5fd8e943948624025b0da30d40ba4ae76