PDF malware analysis — malicious · fbfe1c980e856028

MALICIOUS

PDF

33.7 KB Created: 2021-07-05 07:08:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: ed03f87a145db1c3cb81814ca742f600 SHA-1: 3d5277e6e881141c3cbe1a2077488a30f7f52817 SHA-256: fbfe1c980e856028b1faddcee57319be5b867e1b0212425fb0fef61dc8b73263

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple lures for game hacks and free generators, specifically targeting Roblox and Minecraft. It includes invisible links and CAPTCHA-themed lures directing users to external URLs, such as http://netcdn.tw/app/431946152/roblox-hack-ga-game-hack and https://topkoreamart.com/public/upload/files/free-robux-no-verify-captcha_GM431946152.pdf. These links likely lead to further malicious content or malware downloads, indicated by the high ML classifier score and specific heuristics.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 5

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.
Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE

PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
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/roblox-hack-ga-game-hack PDF link annotation
- https://topkoreamart.com/public/upload/files/minecraft-apk-download-free-11-055_GM479516143.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/the-underground-war-roblox-cheats_GM431946152.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/hack-comment-avoire-des-objets-gratuits-roblox_GM431946152.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/how-to-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/free-roblox-outfits_GM431946152.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/roblox-house-pets-free-vip_GM431946152.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/minecraft-classic-free_GM479516143.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/robux-free-script_GM431946152.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/como-hackear-coin-master-en-espaol_GM406889139.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/what-do-points-do-in-roblox_GM431946152.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/free-minecraft-printables_GM479516143.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/free-robux-no-verify-captcha_GM431946152.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/cheat-engine-for-roblox-2021_GM431946152.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/roblox-hacks-2021-jailbreak_GM431946152.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/free-spins-coinmaster_GM406889139.pdfIn PDF document text
- https://topkoreamart.com/public/upload/files/roblox-speed-hack_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_off00002f27.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2F27	21944 bytes
SHA-256: `5f1e34882514d78f556e655e7b7b3eef2f2a1d63ce443dcb234585e72c589bab`
`font_01_sfnt_off00005fa5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FA5	18656 bytes
SHA-256: `54ca192054bc8c657e8a7f9e976e5c419448410dec473bf437c4f06f1192f6de`

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