PDF malware analysis — malicious · 6571a902a16c178f

MALICIOUS

PDF

34.0 KB Created: 2021-06-18 07:24:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 6cce2e00e809661c2950a3fe3dce45fc SHA-1: ab836cecc619e9003bd4ec6dc6fab13a0ddc5304 SHA-256: 6571a902a16c178f64d8053fa765801250545f1fa4f03a1dc8a44624cece7d3a

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains numerous links to websites offering 'free Robux' or game hacks, indicating a lure-based attack pattern. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the document body content strongly suggest the intent is to redirect users to potentially malicious sites. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-to-get-actual-free-robux-by-doing-nothing-game-hack PDF link annotation
- https://amiranet.com.br/files/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
- https://amiranet.com.br/files/files/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
- https://amiranet.com.br/files/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- https://amiranet.com.br/files/files/prison-life-client-roblox-free_GM431946152.pdfIn PDF document text
- https://amiranet.com.br/files/files/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
- https://amiranet.com.br/files/files/blox-pink-robux-free_GM431946152.pdfIn PDF document text
- https://amiranet.com.br/files/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
- https://amiranet.com.br/files/files/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
- https://amiranet.com.br/files/files/roblox-free-hats_GM431946152.pdfIn PDF document text
- https://amiranet.com.br/files/files/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
- https://amiranet.com.br/files/files/free-likes-on-tiktok_GM835599320.pdfIn PDF document text
- https://amiranet.com.br/files/files/claimrbx-free-robux_GM431946152.pdfIn PDF document text
- https://amiranet.com.br/files/files/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
- https://amiranet.com.br/files/files/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
- https://amiranet.com.br/files/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
- https://amiranet.com.br/files/files/roblox-cbr-free-weekend-glitch_GM431946152.pdfIn PDF document text
- https://amiranet.com.br/files/files/tiktok-free-gas_GM835599320.pdfIn PDF document text
- https://amiranet.com.br/files/files/deep-ocean-roblox-hack_GM431946152.pdfIn PDF document text
- https://amiranet.com.br/files/files/hack-coins-in-coin-master_GM406889139.pdfIn PDF document text
- https://amiranet.com.br/files/files/how-to-hack-roblox-to-get-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
`font_00_sfnt_off00002d77.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2D77	22032 bytes
SHA-256: `e7621ffaaca3e9a30bcbad7d736c2a474118dc1f65051b412ff8374233ddb8a1`
`font_01_sfnt_off00005e60.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E60	19508 bytes
SHA-256: `38ad7160db57f8516702736fe2a178761cba15c2db06146158b205018e4ddb80`

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