PDF malware analysis — malicious · 311a034f71f8af2f

MALICIOUS

PDF

34.0 KB Created: 2021-07-04 23:17:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 0d9bf71c193870e68994603cec76b5c9 SHA-1: 40eb9553db585a24278695b5d6670a826735ead5 SHA-256: 311a034f71f8af2fb12162739b80dd46e5dad63c7bbe51dee66e8b12174e3422

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-giveaway-game-hack PDF link annotation
- http://www.valenciamaids.com/userfiles/files/alsotheking-roblox-hacker_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/cheat-roblox-speed-simulator_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/www-rubux_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/coin-master-free-daily-spins-today_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/coin-master-spin-rewards_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/tiktok-accounts-for-free_GM835599320.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/2021-roblox-hack-team_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/get-robux_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/coin-master-free-spin-app-reviews_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/tiktok-for-free-online_GM835599320.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/working-roblox-hacking-dll_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/roblox-speed-hack-2021-code_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_off00002f89.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2F89	21564 bytes
SHA-256: `47287affa4181de3ddde3ad7cc4d71f677aa7cc20d4e3e50cb2543174bddc623`
`font_01_sfnt_off00005edf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5EDF	19296 bytes
SHA-256: `f9d47c8927f06aca09230474687c7e62d7780f8e0224e11b3e175debbf54a907`

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