PDF malware analysis — malicious · 20aa1256b79f5184

MALICIOUS

PDF

32.5 KB Created: 2021-07-20 14:54:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: dff3cf1f7aa197a802f9fbfdf5b28cea SHA-1: d03f30b7eaea80d3fe2d351b14c4f10370656454 SHA-256: 20aa1256b79f5184147243fed27eb8ace7267ea46dcf46899bed6593308710b6

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to 'free Robux' and game hacks to entice users to click on malicious links. The primary link, http://netcdn.tw/app/431946152/make-free-robux-game-hack, is associated with a high-risk heuristic for game hack redirects. While no scripts were explicitly extracted, the document's structure and embedded URLs suggest it is designed to redirect users to potentially malicious sites or download further payloads, aligning with T1566.001 (Spearphishing Attachment) and T1203 (Exploitation for Client Execution).

Machine Learning

Nyx PDF Classifier malicious score 0.9900

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.tw/app/431946152/make-free-robux-game-hack PDF link annotation
- https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/free-robux-obby_GM431946152.pdfIn PDF document text
- https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
- https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/robux-hack-generator_GM431946152.pdfIn PDF document text
- https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/free-robux-today_GM431946152.pdfIn PDF document text
- https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/roblox-hack-game_GM431946152.pdfIn PDF document text
- https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/how-to-free-robux_GM431946152.pdfIn PDF document text
- https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/free-100-robux_GM431946152.pdfIn PDF document text
- https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
- https://qmsystemsbrochure.com/admin/ckfinder/userfiles/files/tiktok-follower-bot-free_GM835599320.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_off00002a87.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2A87	22012 bytes
SHA-256: `564130e6ace962942006676ffad483fbc2770db708710ece00d5783d77950a77`
`font_01_sfnt_off00005b42.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5B42	18792 bytes
SHA-256: `5e993ba9ca060b95956d6af3fce59918bffd791a350489dcf4615c78742f70ae`

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