PDF malware analysis — malicious · dfac497fe1587147

MALICIOUS

PDF

33.7 KB Created: 2021-07-08 01:10:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 080672f40b50be22475caf113c538794 SHA-1: 338ab25fc91bdc373015e701ef3a9259c192991c SHA-256: dfac497fe1587147af03195e84366e13d5ba58b042b91bc7901b880d0b1669a9

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links, including a primary lure to 'free-100-robux-game-hack' on netcdn.tw. The document body and heuristics indicate a link farm designed to redirect users to potentially malicious sites offering game hacks or currency. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 5

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
PDF links to a 'free generator / game hack' redirector high 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.
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 http://netcdn.tw/app/431946152/free-100-robux-game-hack PDF link annotation
- https://www.cgalgeria-dubai.com/userfiles/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
- https://www.cgalgeria-dubai.com/userfiles/files/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
- https://www.cgalgeria-dubai.com/userfiles/files/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
- https://www.cgalgeria-dubai.com/userfiles/files/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
- https://www.cgalgeria-dubai.com/userfiles/files/coin-master-free-spins-whatsapp-link_GM406889139.pdfIn PDF document text
- https://www.cgalgeria-dubai.com/userfiles/files/robux-hack-tools_GM431946152.pdfIn PDF document text
- https://www.cgalgeria-dubai.com/userfiles/files/sb-game-hacker-coin-master_GM406889139.pdfIn PDF document text
- https://www.cgalgeria-dubai.com/userfiles/files/hack-game-plus-com-coin-master_GM406889139.pdfIn PDF document text
- https://www.cgalgeria-dubai.com/userfiles/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
- https://www.cgalgeria-dubai.com/userfiles/files/roblox-bux-free_GM431946152.pdfIn PDF document text
- https://www.cgalgeria-dubai.com/userfiles/files/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
- https://www.cgalgeria-dubai.com/userfiles/files/weight-lifting-simulator-hack-roblox_GM431946152.pdfIn PDF document text
- https://www.cgalgeria-dubai.com/userfiles/files/hack-booga-booga-roblox_GM431946152.pdfIn PDF document text
- https://www.cgalgeria-dubai.com/userfiles/files/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
- https://www.cgalgeria-dubai.com/userfiles/files/demon-roblox_GM431946152.pdfIn PDF document text
- https://www.cgalgeria-dubai.com/userfiles/files/how-to-find-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- https://www.cgalgeria-dubai.com/userfiles/files/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
- https://www.cgalgeria-dubai.com/userfiles/files/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
- https://www.cgalgeria-dubai.com/userfiles/files/roblox-free-robux-hack-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://www.cgalgeria-dubai.com/userfiles/files/speed-hack-download-roblox-dungeon-quest_GM431946152.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00002e6e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2E6E	21988 bytes
SHA-256: `cbb88ece0822291f4945b848159fcb4170421695b7bdd39a32e89ed24a0201c7`
`font_01_sfnt_off00005e9c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E9C	18996 bytes
SHA-256: `50307759301c9532eb20b67e87d9cc20f2fa9f514687c8f0dcdabe953bf72270`

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