PDF malware analysis — malicious · c7a74f04887451ba

MALICIOUS

PDF

44.6 KB Created: 2021-06-10 17:58:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04

MD5: 083117b623b960823a221c4f83479b59 SHA-1: 264e831bc6b2e24b34cea94e12ae51b5b8f66677 SHA-256: c7a74f04887451ba7647a5f1da28872f32e8ed79b93d5a2790e960c07780b851

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 0.9865

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 https://netcdn.tw/app/431946152/granny-roblox-free-money-game-hack PDF link annotation
- http://www.bestbist.com/assets/uploads/pages/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/how-to-hack-admin-on-roblox-with-cheat-engine-63_GM431946152.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/get-me-free-robux_GM431946152.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/abd-roblox_GM431946152.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/roblox-hack-safe_GM431946152.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/microsoft-rewards-roblox_GM431946152.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/free-robux-app-2021_GM431946152.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/no-scam-free-robux_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_004_off00005046.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5046	25096 bytes
SHA-256: `4f3d9b705cd54e405822f8df082cda5742e8d9d0d61d719e9eb8228201a33208`
`font_01_sfnt_off00008ab5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8AB5	18552 bytes
SHA-256: `f5f3f399d26f8dad073827deb0090a11c8687580ae7f9d5052a10ff45394b8b0`

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