PDF malware analysis — malicious · 67dd8f4b91b35a61

MALICIOUS

PDF

44.2 KB Created: 2021-05-12 06:30:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: dbb4aca425376c055db36b4cde343ed8 SHA-1: 6b4d1b27904dfa255e6ffb54a52ef688c085e091 SHA-256: 67dd8f4b91b35a6178f0d78a7a85efdb288f7f835b0612b25bbdad48efbb73b4

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document employs a game hack lure, specifically referencing 'Robux', to entice users to click on a malicious URL. The ML classifier strongly flagged this PDF as malicious. The embedded URLs suggest a phishing or scam campaign aimed at users seeking in-game currency or cheats. While no scripts were explicitly extracted, the PDF structure and heuristics indicate it's designed to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9976

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.xyz/app/431946152/robux-no-human-verification-game-hack PDF link annotation
- http://pisanie-nut.pl/images/free-minecraft-maps_GM479516143.pdfIn PDF document text
- http://pisanie-nut.pl/images/minecraft-tools_GM479516143.pdfIn PDF document text
- http://pisanie-nut.pl/images/free-multiplayer-minecraft-server_GM479516143.pdfIn PDF document text
- http://pisanie-nut.pl/images/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
- http://pisanie-nut.pl/images/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
- http://pisanie-nut.pl/images/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
- http://pisanie-nut.pl/images/robux-hack-2021_GM431946152.pdfIn PDF document text
- http://pisanie-nut.pl/images/roblox-help-free-robux_GM431946152.pdfIn PDF document text
- http://pisanie-nut.pl/images/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
- http://pisanie-nut.pl/images/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
- http://pisanie-nut.pl/images/synapse-roblox-free_GM431946152.pdfIn PDF document text
- http://pisanie-nut.pl/images/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
- http://pisanie-nut.pl/images/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
- http://pisanie-nut.pl/images/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
- http://pisanie-nut.pl/images/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
- http://pisanie-nut.pl/images/coin-master-free-spins-2021-link_GM406889139.pdfIn PDF document text
- http://pisanie-nut.pl/images/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
- http://pisanie-nut.pl/images/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
- http://pisanie-nut.pl/images/is-minecraft-realms-free_GM479516143.pdfIn PDF document text
- http://pisanie-nut.pl/images/how-to-earn-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
`font_00_sfnt_off00004b90.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4B90	27096 bytes
SHA-256: `772dd2dcc5c76d22e76d06431f5c2e06e1dc4a49dc5249aff28e7f14cfb043d4`
`font_01_sfnt_off0000892f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x892F	18696 bytes
SHA-256: `b0b7efb10b2be72ca1f11f5058a16b7f706f868f5fc2e7590f71e4c885e22b6d`

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