PDF malware analysis — malicious · a1b2817ccdee5932

MALICIOUS

PDF

45.7 KB Created: 2021-06-09 09:01:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 55d64d09c00adc27004d616f7b651ea4 SHA-1: 7cd5ce560659a1bc6dacfc18b96ea93f6b6d1dab SHA-256: a1b2817ccdee5932a6538417d49ac6246cb265121ec5cce0d93789c11c41e9c5

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a link farm, pointing to websites that promise 'Robux hacks' and similar game-related cheats. The ML classifier strongly indicated maliciousness, and the presence of these links suggests a phishing or malware distribution attempt. No scripts were extracted, but the document structure and embedded URIs are indicative of a lure to external malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/como-tener-robux-hack-2021-funcionando-game-hack
- http://huounaixunghe.com/images/free-100-robux_GM431946152.pdf
- http://huounaixunghe.com/images/coin-master-free-spins-link-today-hack_GM406889139.pdf
- http://huounaixunghe.com/images/how-to-get-free-robux-without-paying_GM431946152.pdf
- http://huounaixunghe.com/images/can-u-get-free-robux_GM431946152.pdf
- http://huounaixunghe.com/images/how-to-hack-minecraft_GM479516143.pdf
- http://huounaixunghe.com/images/how-to-get-free-robux-on-phone_GM431946152.pdf
- http://huounaixunghe.com/images/how-to-minecraft-for-free_GM479516143.pdf
- http://huounaixunghe.com/images/free-roblox-premium_GM431946152.pdf
- http://huounaixunghe.com/images/is-windows-10-minecraft-free_GM479516143.pdf
- http://huounaixunghe.com/images/download-coin-master-hack-apk_GM406889139.pdf
- http://huounaixunghe.com/images/free-robux-no-download_GM431946152.pdf
- http://huounaixunghe.com/images/haktuts-coin-master-free-spin-link_GM406889139.pdf
- http://huounaixunghe.com/images/free-tiktok-followers-no-human-verification-or-survey_GM835599320.pdf
- http://huounaixunghe.com/images/coin-master-daily-free-spin-app_GM406889139.pdf
- http://huounaixunghe.com/images/free-tiktok-followers-without-verification_GM835599320.pdf
- http://huounaixunghe.com/images/is-roblox-robux-hacking-banable_GM431946152.pdf
- http://huounaixunghe.com/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdf
- http://huounaixunghe.com/images/how-to-get-tiktok-famous-free_GM835599320.pdf
- http://huounaixunghe.com/images/how-to-earn-free-robux_GM431946152.pdf
- http://huounaixunghe.com/images/robux-hacks-2021_GM431946152.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off0000527b.bin` `f14585775e460a18630c53350befe41787016e8078f59d380ee13ea720637811`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x527B	25128 bytes
`font_01_sfnt_off00008cd8.bin` `4051a92ae0a8a67e0114e71b66365fb899367ac0ce6472e014fa3f76882dab18`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8CD8	19368 bytes

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