PDF malware analysis — malicious · d53a0ad1146a1e18

MALICIOUS

PDF

35.1 KB Created: 2021-07-09 15:33:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: c8f6431ef7904df8f566cebc59bc33ae SHA-1: d96f319f679ec008160572ad38fb5ed0adcc8a53 SHA-256: d53a0ad1146a1e18664b0526fb09e6eccce0a3ccbc800bde7079e240f286b2ca

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-free-spin-and-coin-game-hack PDF link annotation
- https://goodtools.tw/upload/files/roblox-free-promo-codes-2021_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/free-codes-for-roblox-case-clicker_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/asshurtv2-roblox-hack_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/roblox-military-simulator-how-to-use-hacking-device_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/how-free-robux-legit_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/how-to-retrieve-hacked-roblox_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
- https://goodtools.tw/upload/files/hack-mod-coin-master_GM406889139.pdfIn PDF document text
- https://goodtools.tw/upload/files/robux-free-co_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/free-minecraft-codes_GM479516143.pdfIn PDF document text
- https://goodtools.tw/upload/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://goodtools.tw/upload/files/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
- https://goodtools.tw/upload/files/free-roblox-items-virus_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/download-apps-for-robux_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/watch-ads-for-robux_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/roblox-cheat-codes_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/free-robux-now_GM431946152.pdfIn PDF document text
- https://goodtools.tw/upload/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
- https://goodtools.tw/upload/files/free-promo-codes-roblox_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
`stream_002_off0000314c.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x314C	23496 bytes
SHA-256: `8173454cc8222e477d45f1414f3132dce3ea64229fd65e2c2e5d82f5c7d614d2`
`font_01_sfnt_off00006678.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6678	18348 bytes
SHA-256: `3aa320ccb9cb7c087074e4ef079b33192d8e05703f275142029ef104db56ac85`

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