PDF malware analysis — malicious · f39ccb2366f3afbd

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 09:31:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15

MD5: b86df4da8daf322efeb29b0ba605fafb SHA-1: 091e0d51fa49c1e81b34fc28524f18000e939630 SHA-256: f39ccb2366f3afbd55219391ae474d50871f6a8d04989c7a9ebe9d7b8aed8287

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links to external websites, many of which are disguised as game-related downloads or hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these external links, suggesting a link farm or a distribution point for malicious content. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a download button lure further supports the malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

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.
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.tw/app/479516143/minecraft-hack-2021-game-hack PDF link annotation
- https://www.espritroue.fr/ckfinder/userfiles/files/roblox-game-play-online-for-free_GM431946152.pdfIn PDF document text
- https://www.espritroue.fr/ckfinder/userfiles/files/cm-free-spins_GM406889139.pdfIn PDF document text
- https://www.espritroue.fr/ckfinder/userfiles/files/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
- https://www.espritroue.fr/ckfinder/userfiles/files/roblox-cheat-codes-for-vehicle-simulator_GM431946152.pdfIn PDF document text
- https://www.espritroue.fr/ckfinder/userfiles/files/como-volar-en-criminal-vs-swat-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.espritroue.fr/ckfinder/userfiles/files/robux-for-kids_GM431946152.pdfIn PDF document text
- https://www.espritroue.fr/ckfinder/userfiles/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
- https://www.espritroue.fr/ckfinder/userfiles/files/hack-para-counter-blox-roblox-offensive-download_GM431946152.pdfIn PDF document text
- https://www.espritroue.fr/ckfinder/userfiles/files/roblox-app-free-download_GM431946152.pdfIn PDF document text
- https://www.espritroue.fr/ckfinder/userfiles/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.espritroue.fr/ckfinder/userfiles/files/free-robux-card-codes_GM431946152.pdfIn PDF document text
- https://www.espritroue.fr/ckfinder/userfiles/files/free-roblox-clothes-and-hair-boy_GM431946152.pdfIn PDF document text
- https://www.espritroue.fr/ckfinder/userfiles/files/get-me-free-robux_GM431946152.pdfIn PDF document text
- https://www.espritroue.fr/ckfinder/userfiles/files/minecraft-free-apk-java-edition_GM479516143.pdfIn PDF document text
- https://www.espritroue.fr/ckfinder/userfiles/files/cpbildco-robux_GM431946152.pdfIn PDF document text
- https://www.espritroue.fr/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
- https://www.espritroue.fr/ckfinder/userfiles/files/roblox-prison-life-hacks-trackid-sp006_GM431946152.pdfIn PDF document text
- https://www.espritroue.fr/ckfinder/userfiles/files/free-robux-scams_GM431946152.pdfIn PDF document text
- https://www.espritroue.fr/ckfinder/userfiles/files/cheat-in-roblox-jailbreak-money_GM431946152.pdfIn PDF document text
- https://www.espritroue.fr/ckfinder/userfiles/files/hack-minecraft_GM479516143.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_off0000327f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x327F	22472 bytes
SHA-256: `827f064d6d5fe2bc816b9c254e8999d72c63f4f2d05855e9b0ff2aab1b7e6bee`
`font_01_sfnt_off00006438.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6438	18428 bytes
SHA-256: `65ef7673dda910d5c1206c2dd7dddcbba7cd96e5a7782ef6ed0e94e119ec4adc`

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