PDF malware analysis — malicious · 0f113eb7bb23c9c5

MALICIOUS

PDF

43.7 KB Created: 2021-05-12 07:03:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: ce9c7fb7fe0100f125c7f95faa97817f SHA-1: 26410735a239057f3a1460820c6266e842f851ed SHA-256: 0f113eb7bb23c9c5a91087f35a7b3ca6fe1be58288610ac155b592b028e968bc

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

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/get-free-robux-info-game-hack PDF link annotation
- https://corbo.ru/images/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://corbo.ru/images/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
- https://corbo.ru/images/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
- https://corbo.ru/images/coin-master-attack-madness-hack_GM406889139.pdfIn PDF document text
- https://corbo.ru/images/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
- https://corbo.ru/images/robuxglobalcom-no-verification_GM431946152.pdfIn PDF document text
- https://corbo.ru/images/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
- https://corbo.ru/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
- https://corbo.ru/images/roblox-help-free-robux_GM431946152.pdfIn PDF document text
- https://corbo.ru/images/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
- https://corbo.ru/images/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
- https://corbo.ru/images/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
- https://corbo.ru/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://corbo.ru/images/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
- https://corbo.ru/images/hack-coin-master-download_GM406889139.pdfIn PDF document text
- https://corbo.ru/images/game-toolbox_GM479516143.pdfIn PDF document text
- https://corbo.ru/images/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
- https://corbo.ru/images/free-robux-site_GM431946152.pdfIn PDF document text
- https://corbo.ru/images/coin-master-100-free-spins-link_GM406889139.pdfIn PDF document text
- https://corbo.ru/images/robux-matchcomfree-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
`stream_003_off00004a4d.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4A4D	27492 bytes
SHA-256: `a9885ac07d32776f31d9af10aee0f1544579d2a6d2509b2075b24c7ed8f8ccf7`
`font_01_sfnt_off00008919.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8919	18120 bytes
SHA-256: `6e6e8bb7c0e640fc67837f70826b1bbd381eb05acf75ec047415621944091573`

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