PDF malware analysis — malicious · 1c4c62224a55d628

MALICIOUS

PDF

34.6 KB Created: 2021-07-07 22:08:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04

MD5: 284f28ef1dc7674bd3e4e890994d1a54 SHA-1: 136932449336ee81b9d40e99745ab3a33f421e04 SHA-256: 1c4c62224a55d6287052ead895ae1c8210b44f77f3356a68e69af9fa932829c6

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/406889139/coin-master-coins-game-hack PDF link annotation
- https://www.donjastubica.hr/files/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
- http://www.donjastubica.hr/files/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
- http://www.donjastubica.hr/files/robux-free-gift-card_GM431946152.pdfIn PDF document text
- http://www.donjastubica.hr/files/roblox-mods-for-free_GM431946152.pdfIn PDF document text
- https://www.donjastubica.hr/files/free-promo-codes-robux_GM431946152.pdfIn PDF document text
- https://www.donjastubica.hr/files/minecraft-114-download_GM479516143.pdfIn PDF document text
- https://www.donjastubica.hr/files/how-do-you-get-free-roebucks_GM431946152.pdfIn PDF document text
- http://www.donjastubica.hr/files/hack-coin-master-game_GM406889139.pdfIn PDF document text
- http://www.donjastubica.hr/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
- http://www.donjastubica.hr/files/what-is-coin-master-app_GM406889139.pdfIn PDF document text
- https://www.donjastubica.hr/files/free-robux-videos_GM431946152.pdfIn PDF document text
- https://www.donjastubica.hr/files/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.donjastubica.hr/files/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
- https://www.donjastubica.hr/files/roblox-copyright-free-music_GM431946152.pdfIn PDF document text
- https://www.donjastubica.hr/files/free-spin-link_GM406889139.pdfIn PDF document text
- http://www.donjastubica.hr/files/robux-hacking-website-no-verification_GM431946152.pdfIn PDF document text
- https://www.donjastubica.hr/files/ebay-free-roblox-accounts_GM431946152.pdfIn PDF document text
- http://www.donjastubica.hr/files/roblox-hack-move-2021_GM431946152.pdfIn PDF document text
- http://www.donjastubica.hr/files/coin-master-free-food_GM406889139.pdfIn PDF document text
- https://www.donjastubica.hr/files/gamingultracom-roblox-free-goup-generator_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_off0000326c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x326C	22888 bytes
SHA-256: `da13f4dfca52c8404e7dea794f1ba23c9e810c5de5f3f8c52978ff3db686f00e`
`font_01_sfnt_off000065a2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x65A2	17836 bytes
SHA-256: `84574f8323a35f53ec0be3b5c2b4531289117d356e64a8613214cbf4efbbad2d`

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