PDF malware analysis — malicious · b221b6cebe2fad90

MALICIOUS

PDF

42.8 KB Created: 2021-04-24 00:00:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: ded0c0b498cb1ad16e6d00b4f18bb34c SHA-1: 092460ae3c868eba62abb017201bcdfb346fa627 SHA-256: b221b6cebe2fad90b4ea6a5996f28585b9655093be401751c968a384f69ee460

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document employs a social engineering lure related to 'Roblox hacks' and contains multiple links to external websites, including one identified as a game hack redirector. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document likely instructs the user to install a browser extension or viewer, a common tactic for credential theft or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lead the user to a malicious site or trigger a download.

Machine Learning

Nyx PDF Classifier malicious score 0.9941

Heuristics 5

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.
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
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://netsecure.top/app/431946152/roblox-how-to-hack-robux-with-inspect-element-game-hack PDF link annotation
- http://library.unissula.ac.id/fe/repository/free-robux-hack-us-2021.pdfIn PDF document text
- http://library.unissula.ac.id/fk/repository/flame-roblox-exploit-free.pdfIn PDF document text
- http://library.unissula.ac.id/fk/repository/how-to-get-free-robux-hack-on-iphone.pdfIn PDF document text
- http://library.unissula.ac.id/fe/repository/how-to-get-robux-free-on-pc.pdfIn PDF document text
- http://library.unissula.ac.id/fe/repository/free-roblox-credit-card.pdfIn PDF document text
- http://library.unissula.ac.id/fk/repository/fre-robux-websites.pdfIn PDF document text
- http://library.unissula.ac.id/fk/repository/robux-hack-no-human-verification-no-download.pdfIn PDF document text
- http://library.unissula.ac.id/fk/repository/roblox-cheat-engine-30.pdfIn PDF document text
- http://library.unissula.ac.id/fk/repository/roblox-money-cheat-2021.pdfIn PDF document text
- http://library.unissula.ac.id/fe/repository/how-to-get-free-roblox-without-downloading-anything.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_off00004646.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4646	26152 bytes
SHA-256: `aaacf9d0114133fd6717583f90589182d738377955640a4190c57168d1996554`
`font_01_sfnt_off000081f2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x81F2	19512 bytes
SHA-256: `0fd0a02bfd0d2ee0361a0c64f72f0d20715a16bb697d4e99c06c4e37e2a2d3bd`

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