PDF malware analysis — malicious · b426a3d69e2a9a3a

MALICIOUS

PDF

50.4 KB Created: 2021-05-13 08:39:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 75984d2f9038ea43b35e5bb4348e77f7 SHA-1: eb5a491b97b6e8432645c90b1429919eaa2f5419 SHA-256: b426a3d69e2a9a3ae41f7d968acd5510335e4521d117e7530ff61f4a7ae24386

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links and a document body referencing 'Free Robux Redeem Codes 2021', indicating a lure for users interested in obtaining in-game currency or cheats. The PDF_SEO_LINK_FARM heuristic firing suggests a large number of external links, likely to scam or phishing sites. While no scripts were directly extracted, the presence of embedded URLs and the ML classification strongly suggest malicious intent, likely to redirect users to malicious websites for credential harvesting or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.8594

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-redeem-codes-2021-game-hack
- http://bernd-voehringer.de/images/coin-master-game-free-spin-download_GM406889139.pdf
- http://bernd-voehringer.de/images/free-ways-to-get-robux_GM431946152.pdf
- http://bernd-voehringer.de/images/free-robux-hack-no-verification_GM431946152.pdf
- http://bernd-voehringer.de/images/coin-master-hack-pro_GM406889139.pdf
- http://bernd-voehringer.de/images/rape-simulator_GM431946152.pdf
- http://bernd-voehringer.de/images/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdf
- http://bernd-voehringer.de/images/coin-master-free-coins--spins_GM406889139.pdf
- http://bernd-voehringer.de/images/free-robux-codes-no-human-verification_GM431946152.pdf
- http://bernd-voehringer.de/images/free-coin-and-spin-in-coin-master_GM406889139.pdf
- http://bernd-voehringer.de/images/coin-master-free-spins-2021_GM406889139.pdf
- http://bernd-voehringer.de/images/websites-that-give-free-robux_GM431946152.pdf
- http://bernd-voehringer.de/images/100-free-spins-coin-master-link_GM406889139.pdf
- http://bernd-voehringer.de/images/coin-master-free-spin-codes_GM406889139.pdf
- http://bernd-voehringer.de/images/links-to-get-free-spins-on-coin-master_GM406889139.pdf
- http://bernd-voehringer.de/images/coin-master_GM406889139.pdf
- http://bernd-voehringer.de/images/get-free-robux-without-doing-anything_GM431946152.pdf
- http://bernd-voehringer.de/images/coin-master-free-spins-link-2021-today_GM406889139.pdf
- http://bernd-voehringer.de/images/minecraft-pocket-edition-mods-for-free_GM479516143.pdf
- http://bernd-voehringer.de/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
- http://bernd-voehringer.de/images/how-to-get-free-robux-for-free_GM431946152.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004e22.bin` `1dd4ece6ff6874cee2891f14246527ecfd45698c47457e0b94171746af99b060`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4E22	27376 bytes
`font_01_sfnt_off00008c8c.bin` `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C8C	2880 bytes
`font_02_sfnt_off0000966c.bin` `4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x966C	2816 bytes
`font_03_sfnt_off0000a07d.bin` `835008e062f354a08c5cd285c30dce0b291468b55589a8f36d5d300bab70ed7b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA07D	18852 bytes

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