PDF malware analysis — malicious · e8eddb8c33da5d7a

MALICIOUS

PDF

35.2 KB Created: 2021-06-27 09:29:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 9d1c7659d425e2ce4616599e70b656cb SHA-1: caca6765a83ac4a6b08933f4babe706390be814b SHA-256: e8eddb8c33da5d7ac391340ad612b4344ac967c9a2e5fdace8d02b83ed3e5ae3

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a prominent link to a website offering 'free Robux' and game hacks, which is a common lure for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs suggests an attempt to redirect the user to a potentially harmful site. No scripts were extracted, but the document's structure and content point towards a social engineering attack.

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/robuxian-com-free-robux-code-game-hack PDF link annotation
- https://radiocaxias.com.br/portal/imagens/files/android-coin-master-3433-apk-hack_GM406889139.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/cheats-for-coin-master_GM406889139.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/hack-jailbreak-roblox-teletransporte_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/bypass-cheat-engine-roblox_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/coinmaster-blogspot_GM406889139.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/minecraft-is-free-roblox_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-tamil-songs-music-codes-for-roblox_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-robux-generation-2021_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/free-robux-giftcard-may-2021_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/roblox-cheat-codes-for-robux-and-tix-2021_GM431946152.pdfIn PDF document text
- https://radiocaxias.com.br/portal/imagens/files/best-creators-on-roblox-with-free-cloths_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_off00003152.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3152	22668 bytes
SHA-256: `fea92c1d95daf479b2577a14632fd0f84dd30c82b9227d755420925c2d53c31b`
`font_01_sfnt_off000063f8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x63F8	19268 bytes
SHA-256: `887baf9eeb269e4adbd5c8f1bb96c628c5250eea6b47f81813cbc32935455b11`

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