PDF malware analysis — malicious · 10c71cefa15fb9ce

MALICIOUS

PDF

40.7 KB Created: 2021-04-28 12:03:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: b7310e324caea01e26fce34025f81a5b SHA-1: 5dd07efd879c4e321e62645e7b351ad100ee56d0 SHA-256: 10c71cefa15fb9ce6bc9f4b6f6f7add0054800890de52deea864bfd17f567fd1

162 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple heuristics indicating a social engineering lure, specifically impersonating Netflix to trick users into downloading a "Robux Hack". The document directs users to external URLs, such as https://netcdn.xyz/app/431946152/robux-hack-computer-game-hack, which likely host malicious payloads. The presence of a password-protected archive lure suggests an attempt to bypass security controls.

Machine Learning

Nyx PDF Classifier malicious score 0.9941

Heuristics 6

Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE

Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH

Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/robux-hack-computer-game-hack.
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.xyz/app/431946152/robux-hack-computer-game-hack PDF link annotation
- https://lib-stie.yai.ac.id/repository/redeem-roblox-card-codes-free.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-easy-november-2021.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/roblox-ro-hero-academia-hack.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/robux-hack-trackid-sp006.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/roblox-pubg-hack.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/roblox-tix-robux-hack-download.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/works-how-to-get-free-robux-2021-fast-and-easy.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/dragon-ball-rage-roblox-hack-tools.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/roblox-hacked-download-apk.pdfIn PDF document text
- https://lib-stie.yai.ac.id/repository/roblox-how-to-have-free-obc.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_003_off0000431d.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x431D	24880 bytes
SHA-256: `c3ee56704d1e16d3b927c96cac837a7c93b921c7b4ffe05677fb85a54e60cf7c`
`font_01_sfnt_off00007b93.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7B93	18788 bytes
SHA-256: `64abc5062d13ee1bea4f18c541bac06b9263aa5ca15e18dfddef3c3f6ed47604`

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