PDF malware analysis — malicious · 5c9cf360e270bffe

MALICIOUS

PDF

42.9 KB Created: 2021-04-28 06:12:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21

MD5: 3ebd78f6fa3ce9ea6202db580f858c1c SHA-1: 62221a5adf14424a41855295cf3af3302ea1de2b SHA-256: 5c9cf360e270bffe3c76621ed747743b59f2c7ef18691190046433b630069d58

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a malicious redirector leading to a "free Robux" scam. The document body and heuristics strongly suggest a lure for game-related cheats or currency, which is a common social engineering tactic. The presence of numerous similar PDF links further reinforces the malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9836

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/free-robux-sad-game-hack In PDF document text
- https://lib-stie.yai.ac.id/repository/how-to-get-free-rocket-fuel-roblox.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/free-roblox-c4d-lightroom.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/roblox-noclip-hack-december-2021.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/free-robux-for-xbox.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/roblox-build-a-boat-for-treasure-hack-download.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/cheeky-face-free-roblox.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/free-money-in-vehicle-simulator-roblox.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/jouer-avec-manette-free-roblox.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/free-roblox-redeem-codes-11-2-16.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/roblox-4ll-cool-hack.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004047.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4047	26244 bytes
SHA-256: `6bbae7aba2572b7ab270981fb88569874d0ca2cda9b052c0189fc498d27383af`
`font_01_sfnt_off00007b5d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7B5D	2832 bytes
SHA-256: `77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2`
`font_02_sfnt_off0000850e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x850E	18416 bytes
SHA-256: `133fb124e53fb8bb290de1a4cfb89608b83e7cbba37b7c2311a4489cf8de8fab`

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