PDF malware analysis — malicious · 550c03f99e73870e

MALICIOUS

PDF

36.2 KB Created: 2021-06-30 18:02:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04

MD5: 3a1c4027d57f1038047fc0c56e891245 SHA-1: 13645006797b88f204500e7501932c3f932d0bfa SHA-256: 550c03f99e73870ea83c5263b54e32ed8d3a70a58be410076b72dbb8c45f6b01

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.co/app/431946152/roblox-admin-hack-download-game-hack PDF link annotation
- https://www.bridalguide.com/sites/default/files/files/comment-avoir-des-robux-hack_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/claim-free-robux_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/admin-commands-hack-roblox-script-pastebin_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-free-robux_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/roblox-new-free-items_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/robux-hack-no-buying-apps_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/microsoft-store-robux_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-minecraft-generator_GM479516143.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/best-site-for-free-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/minecraft-pe-hack-client-2021_GM479516143.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/coin-master-hack-spin-generator_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_off0000327f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x327F	23320 bytes
SHA-256: `0b15aa2f883e83fef714f0a374b6e97bb6df0c7ab7947a1abeb88d2e42adfa61`
`font_01_sfnt_off00006707.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6707	19540 bytes
SHA-256: `ba3a733b98b0f191bd7505d3f6a7ac56c056a00bac815d575763c61d411dbe44`

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