PDF malware analysis — malicious · a1d400239f9d4ab8

MALICIOUS

PDF

35.7 KB Created: 2021-07-07 04:27:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: a9a97ba4115366fb4fd28d7861eb9696 SHA-1: d910bcdeb42b7ba56b98c1281f8813861937b36a SHA-256: a1d400239f9d4ab818db563e8756f5a991f66a8c19dab6b4d06ae4ad2ee83f86

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/how-to-get-free-pet-food-on-coin-master-game-hack PDF link annotation
- https://radiocaxias.com.br/portal/imagens/files/roblox-hacks-free-pc_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/how-to-hack-roblox-players-2021_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/how-get-free-clothes-in-roblox_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/pubg-uc-zain_GM1330123889.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-robux-generator-2021-no-download_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/how-to-get-free-robux-on-ipad-without-human-verification_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/blox-supply-free-robux_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/growbox-com-free-robux_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-minecraft-server_GM479516143.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-gui-roblox_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-robux-now_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/minecraft-for-free-apk_GM479516143.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/hacker-egg-roblox-2021_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-coin-master-account_GM406889139.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-roblox-old-accounts_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-robux-privat-server_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_off00003339.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3339	23456 bytes
SHA-256: `fd75769f6a3f015e25b236a19139d15bdde5390d4268beab914d30c967a70e3f`
`font_01_sfnt_off00006858.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6858	18492 bytes
SHA-256: `7fed4562ba490980d32b753115adbbbf587e09585f87f2f3eab3679b69c69736`

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