PDF malware analysis — malicious · 45780e5599347680

MALICIOUS

PDF

46.0 KB Created: 2021-05-17 04:03:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 89ca4ac1aff47fd314b0064d67fbbaa2 SHA-1: 8653753813e1f35052daebfb63b11af4a28c961a SHA-256: 45780e55993476802a587b9e3961404a0dfbffa901d14444df430d45ee1e2e1c

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which point to external PDF files hosted on suspicious domains. The ML classifier also flagged this PDF as malicious. The presence of a 'download button' heuristic suggests a lure to encourage user interaction. The primary attack pattern involves directing users to external resources, likely for phishing or to download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9432

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/oprewards-login-game-hack
- http://centr-expert.su/images/coinmasterfreespinlink_GM406889139.pdf
- http://centr-expert.su/images/coin-master-free-attack-link_GM406889139.pdf
- http://centr-expert.su/images/get-free-cards-in-coin-master_GM406889139.pdf
- http://centr-expert.su/images/coin-master-free-spins-link-download_GM406889139.pdf
- http://centr-expert.su/images/free-spin-coin-master-apk_GM406889139.pdf
- http://centr-expert.su/images/how-to-hack-someones-minecraft-account_GM479516143.pdf
- http://centr-expert.su/images/free-coins-for-coin-master_GM406889139.pdf
- http://centr-expert.su/images/coin-master-hackcom-xyz_GM406889139.pdf
- http://centr-expert.su/images/haktuts-coin-master-today_GM406889139.pdf
- http://centr-expert.su/images/coin-master-free-spin-and-coin_GM406889139.pdf
- http://centr-expert.su/images/free-minecraft-skin-maker_GM479516143.pdf
- http://centr-expert.su/images/free-robux-no-password_GM431946152.pdf
- http://centr-expert.su/images/roblox-skin-free_GM431946152.pdf
- http://centr-expert.su/images/free-coin-and-spin-for-coin-master_GM406889139.pdf
- http://centr-expert.su/images/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdf
- http://centr-expert.su/images/coin-master-hack-no-survey_GM406889139.pdf
- http://centr-expert.su/images/free-spins-on-coin-master_GM406889139.pdf
- http://centr-expert.su/images/daily-free-spins-on-coin-master_GM406889139.pdf
- http://centr-expert.su/images/bux-free-robux_GM431946152.pdf
- http://centr-expert.su/images/free-roblox-accounts-with-robux-2021_GM431946152.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000470b.bin` `16367d522ccb8e26f9f6c9d037fb7ab8e054c811d68b52b385c0ee0357d0f21b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x470B	25852 bytes
`font_01_sfnt_off0000834f.bin` `450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x834F	5696 bytes
`font_02_sfnt_off00009060.bin` `81eae8079694c842f573892a7bdeb7507755234d7d643456fdd469df9fa7c23d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9060	18492 bytes

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