PDF malware analysis — malicious · ddac998f013c5bfa

MALICIOUS

PDF

35.2 KB Created: 2021-07-08 08:01:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 1be5df561c6c489a3935510296a308c9 SHA-1: df01d193efb862f2f33a14969dd559299adaf533 SHA-256: ddac998f013c5bfa0560f1f72283073dd92029372a68ec22c91873906ea5f329

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/431946152/20210-robux-game-hack PDF link annotation
- https://www.cow-style.com.tw/upload/files/coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/coin-master-codes_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-spiderman-outfit-on-roblox_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/hack-speed-vehicle-simulator-roblox_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-roblox-accessories_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/roblox-website-robux_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-robux-please_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/roblox-warning-message-cheating_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/game-on-roblox-where-you-protect-computers-from-being-hacked_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/roblox-tix-factory-tycoon-packet-tix-hack_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/how-to-noclip-in-roblox-using-cheat-engine_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/minecraft-app-store-free_GM479516143.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/pokeballs-in-pokemon-go-free_GM1094591345.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/how-to-hack-with-cheat-engine-on-roblox_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/roblox-pin-code-hack_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/how-to-become-builders-club-on-roblox-for-free_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/coin-master-hack-no-human-verification_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_off000032d4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x32D4	22444 bytes
SHA-256: `67e3e2f321efb41d9806b763c9c84f0131f46df685c9579f7d0e4d10291a04b1`
`font_01_sfnt_off000064a9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x64A9	18956 bytes
SHA-256: `75ea27529c0c01066f51b2c4a610dacd0c00866775fa9ae9f69139e6484c1ffd`

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