PDF malware analysis — malicious · 87d14bdced4931f3

MALICIOUS

PDF

34.2 KB Created: 2021-06-29 04:51:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17

MD5: 7cd99810057caec80d97e6991537de3c SHA-1: 634ea866ee097bf1919390fbbe59e77575b45a8f SHA-256: 87d14bdced4931f3ed0d2135da28df47c119efbdfd6bb8d94c2784ecc85d185e

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic firing for a game hack lure, directing users to a malicious URL. The document body and extracted URLs reinforce this finding, indicating a phishing attempt to trick users into visiting a site that likely hosts further malicious content or exploits. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

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.co/app/431946152/inject-hack-roblox-game-code-game-hack PDF link annotation
- https://vosco.vn/uploads/vosco.vn/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/roblox-games-com-free_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/coin-master-cheats_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/a-free-roblox-card_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/how-to-git-free-privert-servers-in-roblox_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/roblox-demon_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/how-to-get-free-roblox-animations_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/roblox-robux-with-cheat-engine_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-robux-mod_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-roblox-card-twitter_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/how-to-get-free-clothes-without-robux_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/faztokens-hack-the-pizzaria-roleplay-remastered-roblox_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/mcpe-optifine_GM479516143.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_off00002dcd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2DCD	22256 bytes
SHA-256: `c9f0352138716cb6d72d4b71c1ea15020eea3690ba842a88ccaa26a8c10fc4a7`
`font_01_sfnt_off00005f5b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F5B	19384 bytes
SHA-256: `5723c163b406190b4532082a3fafbc6b62455260ad8d0d78d53bf3a212ffd547`

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