PDF malware analysis — malicious · b147edc6401917d0

MALICIOUS

PDF

34.4 KB Created: 2021-07-01 20:28:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07

MD5: 6e3b172300976a012ec67de717d48134 SHA-1: 1b81a05c3427fb02e74833b9481acca6b693abc8 SHA-256: b147edc6401917d0e84f29346f6a2942171a1a357110846b9d18f602fafa35d7

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a high-confidence heuristic identifying a lure for game hacks. The document body, though partially corrupted, also contains references to these game-related lures and external URLs. The primary URL identified, http://netcdn.co/app/406889139/coin-master-game-hack, is likely the initial landing page for a scam or further malware distribution.

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/406889139/coin-master-game-hack PDF link annotation
- http://fourieredu.cz/files/ckfinder/files/tiktok-free-recharge-500_GM835599320.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/free-robux-offers_GM431946152.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/watch-ads-for-robux_GM431946152.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/coin-master-mod-apk-free-download_GM406889139.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/coin-master-hack-mod-apk-android-1_GM406889139.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/coin-master-hack-mod-apk-35-8_GM406889139.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/free-robux-link_GM431946152.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/coin-master-codes_GM406889139.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/free-roblox-accounts_GM431946152.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
- http://fourieredu.cz/files/ckfinder/files/websites-that-give-you-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_002_off000031b9.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x31B9	22800 bytes
SHA-256: `5b5f36936d84c346c6ee9997b39f7736f5105aded98eccd15b51b10c7601384c`
`font_01_sfnt_off000064de.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x64DE	17836 bytes
SHA-256: `84574f8323a35f53ec0be3b5c2b4531289117d356e64a8613214cbf4efbbad2d`

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