PDF malware analysis — malicious · fff608896be082ef

MALICIOUS

PDF

49.1 KB Created: 2021-04-22 16:00:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: f920d20549da4d8fcea441e580294dfb SHA-1: 9e4c1178e456278e903ef7a392904c1fd7c75504 SHA-256: fff608896be082efa1fc6d3d1ba1f2a4c10990075b0ca0bd177832e672ad8ffd

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document employs a social engineering lure related to free game exploits and hacks, directing users to external URLs. The heuristic 'SE_BROWSER_INSTALL_LURE' suggests the document may prompt users to install malicious browser extensions or updates. The presence of multiple suspicious URLs, combined with the ML classifier flagging the PDF as malicious, indicates a high likelihood of this document being used to distribute malware or phish for credentials.

Machine Learning

Nyx PDF Classifier malicious score 0.9905

Heuristics 5

PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
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.pro/app/431946152/free-roblox-exploits-2021-not-blocked-by-antivirus-game-hack PDF link annotation
- http://stroygrad-spb.com/images/robux-promo-codes-2021-no-hack.pdfIn PDF document text
- http://stroygrad-spb.com/images/robux-ios-hack.pdfIn PDF document text
- http://stroygrad-spb.com/images/free-robux-for-watching-videos.pdfIn PDF document text
- http://stroygrad-spb.com/images/assassin-knife-hack-roblox.pdfIn PDF document text
- http://stroygrad-spb.com/images/roblox-free-admin-script.pdfIn PDF document text
- http://stroygrad-spb.com/images/roblox-murder-mystery-free-online.pdfIn PDF document text
- http://stroygrad-spb.com/images/roblox-free-robux-no-survey.pdfIn PDF document text
- http://stroygrad-spb.com/images/how-to-get-limitless-free-robux-unpatched.pdfIn PDF document text
- http://stroygrad-spb.com/images/roblox-salty-kid-thinks-im-hacking.pdfIn PDF document text
- http://stroygrad-spb.com/images/free-roblox-promo-codes-december-2021.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_off000046a4.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x46A4	38812 bytes
SHA-256: `c1b4a8df72a6223871e9ee85826aac59f1e3d9cca0d309f08e5cf0a632e07627`
`font_01_sfnt_off00009adf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9ADF	19528 bytes
SHA-256: `599d1041240205ad4dd5f47736139244e8558ecdd135af91be75f8f62ebb03d4`

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