PDF malware analysis — malicious · 449546321da0eb58

MALICIOUS

PDF

41.8 KB Created: 2021-05-16 05:10:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: fba672c7f41fd4e66804ce5e9131074d SHA-1: c24bc9c2d0e39796cab9d727da979a4c2e64329a SHA-256: 449546321da0eb58da9006fe35a649779b38f37ff0557c0410f1ca5c547bf774

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to other PDF files, indicating a link farm or SEO spamming operation. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a malicious workflow designed to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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/coin-master-free-spins-16-04-19-game-hack
- http://korporacjaroma.pl/images/spin-link-coin-master_GM406889139.pdf
- http://korporacjaroma.pl/images/how-to-get-robux-fast_GM431946152.pdf
- http://korporacjaroma.pl/images/haktuts-coin-master-free-spins-2021_GM406889139.pdf
- http://korporacjaroma.pl/images/hack-version-of-coin-master_GM406889139.pdf
- http://korporacjaroma.pl/images/coin-master-free-coins-and-spins_GM406889139.pdf
- http://korporacjaroma.pl/images/free-coin-master-spins-for-today_GM406889139.pdf
- http://korporacjaroma.pl/images/free-coins--spins-coin-master_GM406889139.pdf
- http://korporacjaroma.pl/images/free-robux-com-real_GM431946152.pdf
- http://korporacjaroma.pl/images/daily-free-spins-for-coin-master_GM406889139.pdf
- http://korporacjaroma.pl/images/mcpe-client_GM479516143.pdf
- http://korporacjaroma.pl/images/roblox-hacks-2021_GM431946152.pdf
- http://korporacjaroma.pl/images/free-coin-master-hack-no-verification_GM406889139.pdf
- http://korporacjaroma.pl/images/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdf
- http://korporacjaroma.pl/images/how-to-get-free-hair-on-roblox-2021_GM431946152.pdf
- http://korporacjaroma.pl/images/free-roblox-templates_GM431946152.pdf
- http://korporacjaroma.pl/images/coin-master-support_GM406889139.pdf
- http://korporacjaroma.pl/images/robux-fun-hack_GM431946152.pdf
- http://korporacjaroma.pl/images/free-robux-no-apps_GM431946152.pdf
- http://korporacjaroma.pl/images/coin-master-hack-apk-link_GM406889139.pdf
- http://korporacjaroma.pl/images/hackear-coin-master-sin-root_GM406889139.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004856.bin` `dd332cd93cc2bd4bb44f4663cdeccd91ab03e05c228e5a3005195a5b06755c14`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4856	25068 bytes
`font_01_sfnt_off0000800f.bin` `a0bbfc082f98783fdd447455211163ff4a121f10355b931e3c7b5c7609f08a4a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x800F	18560 bytes

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