PDF malware analysis — malicious · 6f857a45dccebd7a

MALICIOUS

PDF

35.2 KB Created: 2021-07-09 23:17:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13

MD5: 57266b3ccdaf95831fcae7054d711dd8 SHA-1: 09836582b109bf123eedad77d1d1249217411bb0 SHA-256: 6f857a45dccebd7af85e051a0497977908bafd9afd8aaad9a2d54b511c60d75b

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a prominent external URL, all related to game hacks and cheats for popular games like Coin Master and Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract traffic. The ML classifier also flagged this PDF as malicious with high confidence. The primary attack pattern involves directing users to potentially malicious websites that may host malware or phishing content.

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/406889139/coin-master-hack-2021-without-human-verification-game-hack PDF link annotation
- https://www.lincolnec.edu.np/userfiles/files/new-claim-gg-promo-code-free-robux_GM431946152.pdfIn PDF document text
- https://www.lincolnec.edu.np/userfiles/files/roblox-anti-cheat_GM431946152.pdfIn PDF document text
- https://www.lincolnec.edu.np/userfiles/files/how-to-legit-hack-into-somebodies-roblox-account_GM431946152.pdfIn PDF document text
- https://www.lincolnec.edu.np/userfiles/files/free-robux-only-1-step-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.lincolnec.edu.np/userfiles/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
- https://www.lincolnec.edu.np/userfiles/files/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
- https://www.lincolnec.edu.np/userfiles/files/how-to-hack-robux-2021-pc_GM431946152.pdfIn PDF document text
- https://www.lincolnec.edu.np/userfiles/files/roblox-free-race-tracks_GM431946152.pdfIn PDF document text
- https://www.lincolnec.edu.np/userfiles/files/descargar-hack-de-roblox_GM431946152.pdfIn PDF document text
- https://www.lincolnec.edu.np/userfiles/files/free-robux-app_GM431946152.pdfIn PDF document text
- https://www.lincolnec.edu.np/userfiles/files/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
- https://www.lincolnec.edu.np/userfiles/files/hacked-roblox-places_GM431946152.pdfIn PDF document text
- https://www.lincolnec.edu.np/userfiles/files/how-to-hack-in-nba-phenom-roblox_GM431946152.pdfIn PDF document text
- https://www.lincolnec.edu.np/userfiles/files/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
- https://www.lincolnec.edu.np/userfiles/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
- https://www.lincolnec.edu.np/userfiles/files/super-power-training-simulator-roblox-script-hack-pastebin_GM431946152.pdfIn PDF document text
- https://www.lincolnec.edu.np/userfiles/files/hack-coin-master-mod-apk_GM406889139.pdfIn PDF document text
- https://www.lincolnec.edu.np/userfiles/files/dragon-ball-z-rage-roblox-hack-2021_GM431946152.pdfIn PDF document text
- https://www.lincolnec.edu.np/userfiles/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
- https://www.lincolnec.edu.np/userfiles/files/free-spin-coin-master-link-today_GM406889139.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_off000030ab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x30AB	22816 bytes
SHA-256: `7028d66fd9f458b4f5e898d0621273bf5ddca4f28cfb13d8030594f5f26af3dd`
`font_01_sfnt_off000063dd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x63DD	19304 bytes
SHA-256: `50dc84c10d645d869955afc3455aa83c13b71772cc2407cfff29c5ba194c25aa`

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