PDF malware analysis — malicious · e49f97c7f51428c2

MALICIOUS

PDF

41.7 KB Created: 2021-05-11 19:33:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 6da8bf0055a48d3020471d7d2337847d SHA-1: 0b29bb66f1e55a26b92f19a7020382163624f301 SHA-256: e49f97c7f51428c2cc06cc4d8bc5e42da9a196a4bff40e99823db34b8eb1202a

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks and free currency, directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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/406889139/free-coins-coin-master-blog-game-hack PDF link annotation
- https://corbo.ru/images/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
- https://corbo.ru/images/free-robux-mobile_GM431946152.pdfIn PDF document text
- https://corbo.ru/images/free-unlimited-coin-master-online-tool_GM406889139.pdfIn PDF document text
- https://corbo.ru/images/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
- https://corbo.ru/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
- https://corbo.ru/images/coin-master-free-spins-cheat-codes_GM406889139.pdfIn PDF document text
- https://corbo.ru/images/coin-master-hack-account_GM406889139.pdfIn PDF document text
- https://corbo.ru/images/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
- https://corbo.ru/images/free-coins-coin-master-link_GM406889139.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/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://corbo.ru/images/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
- https://corbo.ru/images/can-you-give-me-robux_GM431946152.pdfIn PDF document text
- https://corbo.ru/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
- https://corbo.ru/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
- https://corbo.ru/images/free-robux-wheel_GM431946152.pdfIn PDF document text
- https://corbo.ru/images/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://corbo.ru/images/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
- https://corbo.ru/images/coin-master-hack-ios-10_GM406889139.pdfIn PDF document text
- https://corbo.ru/images/how-to-get-free-robux-instantly_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_off0000493e.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x493E	24348 bytes
SHA-256: `fe310f17affaad6c5b2a68e5b5b20e33266e22225d5e59c41da0c4499b94a6b6`
`font_01_sfnt_off000080cd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x80CD	18288 bytes
SHA-256: `525699ae71861fffeab431a07c950b4914d38a871fb98becad0e0bea9ac3f1df`

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