PDF malware analysis — malicious · 344f0164194d6827

MALICIOUS

PDF

47.6 KB Created: 2021-05-14 13:05:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 7f6f701808f57c4ddcf0171eaab8299b SHA-1: 7f3d049832064df83e357001c82c8c9b96dee080 SHA-256: 344f0164194d6827952e19fc75da8b8ea54bc7f5279e0ce1579653ce0c60a42c

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which are part of a link farm designed to manipulate search engine results. The document body, though partially corrupted, suggests a lure related to 'free spins' or 'hacks' for games like Coin Master and Roblox. The heuristic 'PDF_SEO_LINK_FARM' strongly indicates this is not a legitimate document but rather a tool for SEO spam or potentially hosting malicious content at the linked URLs.

Machine Learning

Nyx PDF Classifier malicious score 0.9013

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/hack-to-get-free-spins-on-coin-master-game-hack
- https://weddingcards-expert.tw/upload/files/my-roblox-account-was-hacked_GM431946152.pdf
- https://weddingcards-expert.tw/upload/files/haktuts-coin-master-free-spins-2021_GM406889139.pdf
- https://weddingcards-expert.tw/upload/files/coin-master-free-spins-link-2021_GM406889139.pdf
- https://weddingcards-expert.tw/upload/files/coin-master-daily-free-spins-today_GM406889139.pdf
- https://weddingcards-expert.tw/upload/files/coin-master-free-spins-link-2021-hack_GM406889139.pdf
- https://weddingcards-expert.tw/upload/files/roblox-free-robux-com_GM431946152.pdf
- https://weddingcards-expert.tw/upload/files/hack-card-collection-coin-master_GM406889139.pdf
- https://weddingcards-expert.tw/upload/files/is-minecraft-free-on-ps4_GM479516143.pdf
- https://weddingcards-expert.tw/upload/files/free-robux-no-offers_GM431946152.pdf
- https://weddingcards-expert.tw/upload/files/coin-master-hack-version-2021-download_GM406889139.pdf
- https://weddingcards-expert.tw/upload/files/toolbox-for-minecraft_GM479516143.pdf
- https://weddingcards-expert.tw/upload/files/free-robux-gift-card-codes-2021_GM431946152.pdf
- https://weddingcards-expert.tw/upload/files/where-can-i-get-free-coins-for-coin-master_GM406889139.pdf
- https://weddingcards-expert.tw/upload/files/coin-master-free-spin-link-daily_GM406889139.pdf
- https://weddingcards-expert.tw/upload/files/roblox-hacked-version-download_GM431946152.pdf
- https://weddingcards-expert.tw/upload/files/coin-master-generator-hack_GM406889139.pdf
- https://weddingcards-expert.tw/upload/files/free-minecraft-capes_GM479516143.pdf
- https://weddingcards-expert.tw/upload/files/free-links-for-coin-master_GM406889139.pdf
- https://weddingcards-expert.tw/upload/files/coin-master-free-spin-ml_GM406889139.pdf
- https://weddingcards-expert.tw/upload/files/roblox-source_GM431946152.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off0000497f.bin` `65e8dca64a99c987a0818373e29985ceafa93ecacbec623578b0e21c6df63e7a`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x497F	30136 bytes
`font_01_sfnt_off00008d27.bin` `4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D27	3400 bytes
`font_02_sfnt_off00009850.bin` `2fbb404e8dbae95b2969f6d33f181e6a84e8673995acec3e52dde22e48280f02`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9850	18056 bytes

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