PDF malware analysis — malicious · b1138381d8e4cb42

MALICIOUS

PDF

44.5 KB Created: 2021-05-12 19:30:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 9536a3ab2e3fa12d20db4305f290f120 SHA-1: 79cfd2b5ccdb1145179bdd54aea78f3d17df6934 SHA-256: b1138381d8e4cb427723db6a057d8bb24252f2b08bcfefc6aa721940231d6f25

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains multiple links that are designed to lure users into downloading game hacks or obtaining free in-game currency. The primary link, https://netcdn.xyz/app/406889139/coin-master-hack-tool-download-game-hack, is flagged as a game hack redirector. The document body, though heavily obfuscated, contains metadata and references to these lures, suggesting a social engineering tactic to drive traffic to potentially malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9632

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/coin-master-hack-tool-download-game-hack PDF link annotation
- http://muko-unterfranken.info/images/coin-master-free-spins-2021-link_GM406889139.pdfIn PDF document text
- http://muko-unterfranken.info/images/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
- http://muko-unterfranken.info/images/free-robux-android_GM431946152.pdfIn PDF document text
- http://muko-unterfranken.info/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
- http://muko-unterfranken.info/images/games-that-give-free-robux_GM431946152.pdfIn PDF document text
- http://muko-unterfranken.info/images/www-coin-master-hack_GM406889139.pdfIn PDF document text
- http://muko-unterfranken.info/images/coin-master-strategy_GM406889139.pdfIn PDF document text
- http://muko-unterfranken.info/images/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
- http://muko-unterfranken.info/images/coin-master-free-spins-link-31-march-2021_GM406889139.pdfIn PDF document text
- http://muko-unterfranken.info/images/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
- http://muko-unterfranken.info/images/best-free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
- http://muko-unterfranken.info/images/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
- http://muko-unterfranken.info/images/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
- http://muko-unterfranken.info/images/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- http://muko-unterfranken.info/images/master-coin-hack_GM406889139.pdfIn PDF document text
- http://muko-unterfranken.info/images/free-robux-com_GM431946152.pdfIn PDF document text
- http://muko-unterfranken.info/images/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
- http://muko-unterfranken.info/images/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
- http://muko-unterfranken.info/images/how-to-get-free-coins-on-flip-master_GM406889139.pdfIn PDF document text
- http://muko-unterfranken.info/images/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004ab4.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4AB4	23964 bytes
SHA-256: `8ea4eb73f0a608de70e822a14f3ba4186415e976f73326920315ce372085049d`
`font_01_sfnt_off00008192.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8192	2824 bytes
SHA-256: `381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5`
`font_02_sfnt_off00008b34.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8B34	18296 bytes
SHA-256: `679f4024a0f63c0836264bcfe59f64cb99cb733805cdde821f10afb71f032f62`

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