PDF malware analysis — malicious · f12b0a2bc81f5256

MALICIOUS

PDF

35.0 KB Created: 2021-06-25 08:27:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 108e4dd630bd37038c4ac48c55040ca7 SHA-1: 673550402679b1b38356f136563b0754fcccef36 SHA-256: f12b0a2bc81f52565123937d2749ec406417f368df114b4e7145646706dcbdc4

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple external links, including one specifically identified as a 'game hack' redirector, suggesting a social engineering lure to trick users into visiting potentially malicious sites. The document body and extracted URLs reinforce this by referencing game hacks and free currency for popular games like Coin Master and Roblox. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or scam attempt, likely leveraging a client-side exploit or simply directing users to malicious web content.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/406889139/how-to-get-free-spins-in-coin-master-2021-game-hack PDF link annotation
- https://www.hearcolors.com.mx/img/blog/files/roblox-hacked-version_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/but-link-says-free-robux_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/robux-fun-hack_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/coin-master-free-pet-snacks_GM406889139.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/roblox-but_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/toolbox-mod_GM479516143.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/minecraft-net-download-free_GM479516143.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
- https://www.hearcolors.com.mx/img/blog/files/como-hackear-el-juego-coin-master_GM406889139.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_002_off000030f2.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x30F2	22992 bytes
SHA-256: `3ebfd230f5b923f550e7aec98cf40ab4bb6550d3fdc2acf471f4c3e22ac0960e`
`font_01_sfnt_off000064a7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x64A7	18740 bytes
SHA-256: `821de93f8b3417c0f233c24cc26099972f2fb00f78fdfa3c6795f0d6fdf59cc4`

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