PDF malware analysis — malicious · dcd4e5635c61716f

MALICIOUS

PDF

44.8 KB Created: 2021-05-14 04:50:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15

MD5: c8dfd9a90e88677518992f9931259863 SHA-1: 11e157253e7b4fa0147c9352c286a3e82a396d1f SHA-256: dcd4e5635c61716fc7cbb53ff3594eea70e61d8736c74daef5aa8d8b6c86dd21

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to external resources. The document body, though partially corrupted, contains text related to 'Free Robux Accounts' and a URL, suggesting a lure to a scam or malware download site. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious nature of the file.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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/431946152/free-robux-accounts-game-hack PDF link annotation
- https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/hack-roblox-players_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/free-money-and-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/how-to-earn-robux-fast_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/free-promo-codes-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-free-shield_GM406889139.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-free-spin-sites_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_003_off000049be.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x49BE	28592 bytes
SHA-256: `e0bea7b7ee8adcefad71f17408851841cee06b093bd9116d6e1190415250094f`
`font_01_sfnt_off00008d4f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D4F	18120 bytes
SHA-256: `ef72730342a71d63428e939ae8b3e53b657bfaebcd113dd5195284c27a8ef9c4`

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