PDF malware analysis — malicious · 23e108292d89bc9e

MALICIOUS

PDF

41.5 KB Created: 2021-04-30 11:23:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16

MD5: ef2737dc9c8d2b143952f0590b4ea0ba SHA-1: fd2020b1a9028a73c5d7d8e2e70fe0b34cff0f02 SHA-256: 23e108292d89bc9e8e6e863d8e7d1ec38e8630a43c3af301e98a823792e2db3a

90 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 game hacking, specifically for Roblox, to trick users into downloading further malicious content. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document likely prompts the user to install a browser extension or update, a common tactic for malware delivery. The presence of multiple external URLs, including one pointing to a potential exploit or malware download, reinforces this malicious intent. No scripts were extracted from this sample, but the overall structure and heuristics strongly suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9941

Heuristics 5

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
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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/how-to-hack-legend-of-the-bone-sword-roblox-game-hack PDF link annotation
- https://www.regaloscabalgatas.es/ckfinder/userfiles/files/groups-that-give-free-robux-2021.pdfIn PDF document text
- https://www.regaloscabalgatas.es/ckfinder/userfiles/files/free-robux-no-offers-no-survey.pdfIn PDF document text
- https://www.regaloscabalgatas.es/ckfinder/userfiles/files/robux-hack-artmoney.pdfIn PDF document text
- https://www.regaloscabalgatas.es/ckfinder/userfiles/files/hack-roblox-account-kali-linux.pdfIn PDF document text
- https://www.regaloscabalgatas.es/ckfinder/userfiles/files/best-free-items-in-roblox.pdfIn PDF document text
- https://www.regaloscabalgatas.es/ckfinder/userfiles/files/roblox-vehicle-simulator-money-hack-script.pdfIn PDF document text
- https://www.regaloscabalgatas.es/ckfinder/userfiles/files/how-to-get-free-robux-no-survey-or-download.pdfIn PDF document text
- https://www.regaloscabalgatas.es/ckfinder/userfiles/files/visea-descargar-hack-roblox.pdfIn PDF document text
- https://www.regaloscabalgatas.es/ckfinder/userfiles/files/checkmein-free-roblox.pdfIn PDF document text
- https://www.regaloscabalgatas.es/ckfinder/userfiles/files/free-roblox-for-roblox.pdfIn PDF document text
- https://robux-rank.comIn 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_off00004387.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4387	26692 bytes
SHA-256: `c652a859f93de9af519be7e38d8c3b6a99884635e1f645cab30e83960ff273b4`
`font_01_sfnt_off00007e6f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7E6F	18976 bytes
SHA-256: `5afd5ab4f152409e774c02bae870ad86cd0a81cd7f5480d6ef0f3e0618b38b1a`

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