PDF malware analysis — malicious · 509b5b380e8618fc

MALICIOUS

PDF

44.8 KB Created: 2021-05-14 10:36:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 397f82a0851f47bd845b416670ef7afd SHA-1: b75395baa2de8c3842b7fadbf5fc211457205063 SHA-256: 509b5b380e8618fcaa6bb86ed760ec5d4010595a7d33a2f6c2bf47104cadfc52

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF exploits a common lure of 'free game currency' or 'hacks' to trick users into clicking a link. The link redirects to another PDF hosted on a suspicious domain, likely serving as a downloader or further redirector. The ML classifier strongly indicates malicious intent, and the presence of embedded URLs and a download button lure reinforces the phishing and potential payload delivery vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9632

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-on-coin-master-generator-game-hack PDF link annotation
- http://pianoservice.com.ua/images/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
- http://pianoservice.com.ua/images/coin-master-gold-cards-hack-english_GM406889139.pdfIn PDF document text
- http://pianoservice.com.ua/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
- http://pianoservice.com.ua/images/hacker-minecraft-song_GM479516143.pdfIn PDF document text
- http://pianoservice.com.ua/images/coin-master-instagram-free-spins_GM406889139.pdfIn PDF document text
- http://pianoservice.com.ua/images/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
- http://pianoservice.com.ua/images/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- http://pianoservice.com.ua/images/roblox-source_GM431946152.pdfIn PDF document text
- http://pianoservice.com.ua/images/coin-spin-link_GM406889139.pdfIn PDF document text
- http://pianoservice.com.ua/images/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
- http://pianoservice.com.ua/images/coin-master-hack-version-download-ios_GM406889139.pdfIn PDF document text
- http://pianoservice.com.ua/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
- http://pianoservice.com.ua/images/free-coin-link-for-coin-master_GM406889139.pdfIn PDF document text
- http://pianoservice.com.ua/images/roblox-hack-site_GM431946152.pdfIn PDF document text
- http://pianoservice.com.ua/images/free-draw-roblox_GM431946152.pdfIn PDF document text
- http://pianoservice.com.ua/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
- http://pianoservice.com.ua/images/earn-robux-online_GM431946152.pdfIn PDF document text
- http://pianoservice.com.ua/images/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
- http://pianoservice.com.ua/images/free-minecraft-hosting_GM479516143.pdfIn PDF document text
- http://pianoservice.com.ua/images/robux-generator-no-verification-needed_GM431946152.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_off0000478f.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x478F	26072 bytes
SHA-256: `6171434b633ad84b3e3bc3296ff1293e9ea7f55193e9e7006ad3c332aad3a68e`
`font_01_sfnt_off0000834b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x834B	3400 bytes
SHA-256: `4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07`
`font_02_sfnt_off00008e75.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E75	17712 bytes
SHA-256: `e8b1eba143f1d3c0478eece1d902ba9fd5ecbd562c4f2d9cad907c7e05d934a1`

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