PDF malware analysis — malicious · 316aa3db09db708a

MALICIOUS

PDF

44.5 KB Created: 2021-05-15 11:15:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13

MD5: 3010caab1bfb8a28c7d6cb04565c7d18 SHA-1: 6a0a7dc080eaa912522d5b5cde6db9f27c44e2e7 SHA-256: 316aa3db09db708ab00bd2fcdb54babef619d7238afc0eb270c959aa6b77dced

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains numerous external links, identified as a link farm, likely intended to manipulate search engine rankings or direct users to malicious content. The document body, though partially corrupted, contains phrases like 'Free Links To Coin Master' and includes URLs that suggest a lure for game-related cheats or hacks. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9632

Heuristics 4

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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-links-to-coin-master-game-hack PDF link annotation
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/coin-master-free-in-app-purchases_GM406889139.pdfIn PDF document text
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/coinmaster-links_GM406889139.pdfIn PDF document text
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/coin-master-hack-mod-apk-2021_GM406889139.pdfIn PDF document text
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/are-robux-generators-safe_GM431946152.pdfIn PDF document text
- https://www.extrifit.com/uploads/ckfinder/userfiles/files/free-robux-generator_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_off00004985.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4985	25264 bytes
SHA-256: `c34b81bfbdb196f9f564a203f8bbbd0caba7759e96d4c0e86c6062d466d68bab`
`font_01_sfnt_off000082f0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x82F0	2840 bytes
SHA-256: `3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676`
`font_02_sfnt_off00008ca2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8CA2	17880 bytes
SHA-256: `1898eeb35173f70b59c84058d9d8580582d84ad8b6feb537a53f23d464b6e221`

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