PDF malware analysis — malicious · 50ae6e04adc336a0

MALICIOUS

PDF

33.9 KB Created: 2021-07-19 06:31:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 2c1a4f14724534dadd2c40079fc0b369 SHA-1: 126d64b99ca54a89e63d275e87ec198fbb15fcc8 SHA-256: 50ae6e04adc336a08fac274b87e2f35f68bbb3b3c751eb9eb7541d464d04e1ae

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links, with a primary focus on a "free generator / game hack" lure. The heuristic firings indicate that the document links to known malicious redirector infrastructure, specifically http://netcdn.tw/app/406889139/free-spin-coin-master-2021-link-game-hack. This suggests the document's purpose is to redirect users to potentially harmful websites, likely for phishing or malware distribution. No scripts were extracted, but the embedded URLs and lure theme are strong indicators of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

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 http://netcdn.tw/app/406889139/free-spin-coin-master-2021-link-game-hack In PDF document text
- https://www.bmta.co.uk/images/blox-fish-free-robux_GM431946152.pdfIn PDF document text
- https://www.bmta.co.uk/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.bmta.co.uk/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
- https://www.bmta.co.uk/images/free-coin-coin-master_GM406889139.pdfIn PDF document text
- https://www.bmta.co.uk/images/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
- https://www.bmta.co.uk/images/free-minecraft-maps_GM479516143.pdfIn PDF document text
- https://www.bmta.co.uk/images/free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
- https://www.bmta.co.uk/images/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
- https://www.bmta.co.uk/images/minecraft-free-ios_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
`stream_002_off00002d75.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2D75	23288 bytes
SHA-256: `cd51b467cc1857706f9d569f790a5827a5ccba4df57412d085240a6c2efcacc6`
`font_01_sfnt_off00006225.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6225	18456 bytes
SHA-256: `7500aca679d0fadfbda1e17cf023a195ee80a601fef81e7f7ced8cf50182af56`

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