PDF malware analysis — malicious · a68d4a71087f013b

MALICIOUS

PDF

44.2 KB Created: 2021-05-13 21:55:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: bb2f335cce977f88962aab8e9d752e0c SHA-1: 4ce6b71ed3e195bc7e4574074f9a796821fcf95a SHA-256: a68d4a71087f013b755607443628088eea0f7e65f6595a86ac385140f037cb72

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are disguised as game-related cheats or generators. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting a malicious intent to redirect users to potentially harmful content. The ML classifier also flagged the PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9648

Heuristics 5

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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/master-coin-hack-game-game-hack PDF link annotation
- http://bemviverclin.com.br/images/coin-master-daily-spin-link_GM406889139.pdfIn PDF document text
- http://bemviverclin.com.br/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
- http://bemviverclin.com.br/images/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
- http://bemviverclin.com.br/images/robux-free-robux_GM431946152.pdfIn PDF document text
- http://bemviverclin.com.br/images/coin-master-free-coins-and-spins-today_GM406889139.pdfIn PDF document text
- http://bemviverclin.com.br/images/www-cheatsk-com-coin-master-hack_GM406889139.pdfIn PDF document text
- http://bemviverclin.com.br/images/original-roblox_GM431946152.pdfIn PDF document text
- http://bemviverclin.com.br/images/coin-master-free-spin-link-new_GM406889139.pdfIn PDF document text
- http://bemviverclin.com.br/images/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
- http://bemviverclin.com.br/images/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
- http://bemviverclin.com.br/images/free-robux-codes_GM431946152.pdfIn PDF document text
- http://bemviverclin.com.br/images/coin-master-free-spins-link-blogspot-april-2021_GM406889139.pdfIn PDF document text
- http://bemviverclin.com.br/images/hack-coin-master-online-without-human-verification_GM406889139.pdfIn PDF document text
- http://bemviverclin.com.br/images/coin-master-free-spin-game_GM406889139.pdfIn PDF document text
- http://bemviverclin.com.br/images/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
- http://bemviverclin.com.br/images/free-robux-download_GM431946152.pdfIn PDF document text
- http://bemviverclin.com.br/images/free-robux-only-1-step_GM431946152.pdfIn PDF document text
- http://bemviverclin.com.br/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
- http://bemviverclin.com.br/images/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
- http://bemviverclin.com.br/images/free-robux-without-survey_GM431946152.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_off000049b1.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x49B1	24276 bytes
SHA-256: `adbfb3e342f22b09e669938a2b563ed318b6f9b21c559443569759a1557d11db`
`font_01_sfnt_off000080da.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x80DA	2916 bytes
SHA-256: `f134aa634fe19e19e1e8f403e5b2bfe45c83fa183c2a66e76bf5f84c6ac25db6`
`font_02_sfnt_off00008aef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8AEF	17976 bytes
SHA-256: `61a7e5df1615dd2bed66e1a1700862b148b1481b00ec863c05290e253e9efb54`

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