PDF malware analysis — malicious · f9efd5d1dfdafbd3

MALICIOUS

PDF

42.0 KB Created: 2021-05-11 09:04:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: f1958727a04de948b0bb5c18f57e0dae SHA-1: 9bd9fa26cf64f9c9e8ef95804d61dd5ef79ce9e7 SHA-256: f9efd5d1dfdafbd36fa583a68c45185ef24d740f0e9d374c7d0eedeedd502860

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains multiple links that lure users with promises of game hacks and free currency. The primary link, https://netcdn.xyz/app/406889139/free-spin-coin-master-2021-link-game-hack, is associated with a high-severity heuristic indicating a game hack redirector. The document body, though heavily corrupted, contains references to similar lures and the authoring application 'wkhtmltopdf', suggesting it was generated programmatically to host these malicious links.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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 https://netcdn.xyz/app/406889139/free-spin-coin-master-2021-link-game-hack PDF link annotation
- http://spentulib.com/search/repository/coin-master-unlimited-spins-apk-free-download_GM406889139.pdfIn PDF document text
- http://spentulib.com/search//repository/easy-robux-hack_GM431946152.pdfIn PDF document text
- http://spentulib.com/search//repository/play-minecraft-free-online-no-download_GM479516143.pdfIn PDF document text
- http://spentulib.com/search/repository/coin-master-free-cards-and-spin-link_GM406889139.pdfIn PDF document text
- http://spentulib.com/search//repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
- http://spentulib.com/search/repository/spins-coin-master_GM406889139.pdfIn PDF document text
- http://spentulib.com/search//repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
- http://spentulib.com/search/repository/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
- http://spentulib.com/search/repository/coin-master-hack-app-for-iphone_GM406889139.pdfIn PDF document text
- http://spentulib.com/search//repository/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
- http://spentulib.com/search/repository/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
- http://spentulib.com/search//repository/websites-that-give-free-robux_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
`stream_003_off00003fdf.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3FDF	29520 bytes
SHA-256: `95c5ac2b24759d1ca6cafeb5a88266707517770dc7e8c0fd078c71072c1a5e2d`
`font_01_sfnt_off0000819f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x819F	18456 bytes
SHA-256: `7500aca679d0fadfbda1e17cf023a195ee80a601fef81e7f7ced8cf50182af56`

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