Malicious PDF — malware analysis report

Static analysis result for SHA-256 c17fe595212f47da…

MALICIOUS

PDF

40.8 KB Created: 2021-04-30 09:17:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 245ed8b1e03b63c8a82df4118e8650cb SHA-1: c99bd1ad3501603c6df5d81a7bbbd6cc4c9593fc SHA-256: c17fe595212f47dafa7700954d2df8bb2005017f47e9fc95aaa32636ea50f4f6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting a 'Roblox free VIP account game hack'. The heuristic firings indicate that these links are part of a known malicious redirector chain. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to drive users to a malicious site, likely for credential harvesting or further malware delivery.

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/roblox-free-vip-account-game-hack In PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/how-can-i-get-free-robux.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/promo-codes-for-free-robux-on-roblox.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/how-to-get-free-robux-without-hacking-2021.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/roblox-hacker-download.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/roblox-jailbreak-teleport-hack-2021.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/roblox-hack-bee-swarm-simulator.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/free-roblox-shirt-templates-2021.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/speed-city-roblox-hack.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/is-it-hacking-if-i-use-autoclicker-in-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_off0000427d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x427D 26156 bytes
SHA-256: c0fc338508717ac0c6904989b973f01d43a0b46b8df0f78762cd6fedf371ed0d
font_01_sfnt_off00007cee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CEE 18624 bytes
SHA-256: 87aec68d47171cda3b9f6b3a27fa376b963b695a8c129785b9cfb504bfc6679f