PDF malware analysis — malicious · 1c77a490505a7257

MALICIOUS

PDF

45.1 KB Created: 2021-05-14 13:01:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: b6939e5d08b3f849d3527143b253de4a SHA-1: d3d09c9d57277b5c88c8f0ba2cb8c094946f7084 SHA-256: 1c77a490505a7257ecf89a99afc55814d88b2b3662ebdd32d043bfd8a87f6215

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 0.9621

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/406889139/100-free-spins-coin-master-game-hack PDF link annotation
- https://www.udivadlahotel.cz/images/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
- https://www.udivadlahotel.cz/images/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdfIn PDF document text
- https://www.udivadlahotel.cz/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
- https://www.udivadlahotel.cz/images/android-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.udivadlahotel.cz/images/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
- https://www.udivadlahotel.cz/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.udivadlahotel.cz/images/coin-master-hacks-for-spins_GM406889139.pdfIn PDF document text
- https://www.udivadlahotel.cz/images/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://www.udivadlahotel.cz/images/coin-master-hack-1021_GM406889139.pdfIn PDF document text
- https://www.udivadlahotel.cz/images/instant-robux_GM431946152.pdfIn PDF document text
- https://www.udivadlahotel.cz/images/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdfIn PDF document text
- https://www.udivadlahotel.cz/images/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
- https://www.udivadlahotel.cz/images/how-to-hack-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.udivadlahotel.cz/images/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
- https://www.udivadlahotel.cz/images/roblox-free-clothes-generator_GM431946152.pdfIn PDF document text
- https://www.udivadlahotel.cz/images/free-links-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.udivadlahotel.cz/images/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
- https://www.udivadlahotel.cz/images/coin-master-game-hunter_GM406889139.pdfIn PDF document text
- https://www.udivadlahotel.cz/images/free-robux-hack_GM431946152.pdfIn PDF document text
- https://www.udivadlahotel.cz/images/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off000049cf.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x49CF	25236 bytes
SHA-256: `65e1da3a0eafeace9ec1ea496b3b62544c84c809276d7c4cb7f335c920da47dd`
`font_01_sfnt_off000082f8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x82F8	3204 bytes
SHA-256: `8c2546387700f45186c395d475006178ee984eabbc175bcf1ee6eb58ba8b57aa`
`font_02_sfnt_off00008dfc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8DFC	18164 bytes
SHA-256: `9bc61af2acbda784231945e40c4a4bb5d6810b0d04641be6b37b2cdd3c5b78bc`

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