PDF malware analysis — malicious · 77d3627f07519aa7

MALICIOUS

PDF

42.7 KB Created: 2021-05-18 03:37:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 62e72e8df4018135064219ba665d42b6 SHA-1: b6ba73c1bdaf3827f67c2dd6e9b30e4d73cc184a SHA-256: 77d3627f07519aa735b23aae813b94cc70a52bf1dfcdfe1d0508a46939cf89cd

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external PDF files, many of which are hosted on the astdubai.co domain and appear to be part of a link farm. The document's content and the presence of a "download button" heuristic suggest a lure to trick users into downloading further malicious content. The ML classifier strongly indicated maliciousness, and the PDF_URI heuristic confirms the presence of external links.

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/479516143/free-games-like-minecraft-game-hack
- http://astdubai.co/userfiles/files/free-mods-for-coin-master_GM406889139.pdf
- http://astdubai.co/userfiles/files/robux-free-promo-codes_GM431946152.pdf
- http://astdubai.co/userfiles/files/minecraft-pe_GM479516143.pdf
- http://astdubai.co/userfiles/files/free-robux-games-on-roblox_GM431946152.pdf
- http://astdubai.co/userfiles/files/free-robux-hack-no-verification_GM431946152.pdf
- http://astdubai.co/userfiles/files/coin-master-spins-2021_GM406889139.pdf
- http://astdubai.co/userfiles/files/free-spin-link-for-coin-master-game_GM406889139.pdf
- http://astdubai.co/userfiles/files/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdf
- http://astdubai.co/userfiles/files/how-to-play-roblox-for-free_GM431946152.pdf
- http://astdubai.co/userfiles/files/coin-master-free-spins-through-coin-pop_GM406889139.pdf
- http://astdubai.co/userfiles/files/free-robux-hacker-us_GM431946152.pdf
- http://astdubai.co/userfiles/files/coin-master-free-coins-link-facebook_GM406889139.pdf
- http://astdubai.co/userfiles/files/coin-master-free-daily-spins-link-2021_GM406889139.pdf
- http://astdubai.co/userfiles/files/is-minecraft-free-on-ps4_GM479516143.pdf
- http://astdubai.co/userfiles/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdf
- http://astdubai.co/userfiles/files/robux-hacks-2021_GM431946152.pdf
- http://astdubai.co/userfiles/files/coin-master-free-spins-link-download_GM406889139.pdf
- http://astdubai.co/userfiles/files/buy-robux-free_GM431946152.pdf
- http://astdubai.co/userfiles/files/coin-master-daily-free-spins-2021_GM406889139.pdf
- http://astdubai.co/userfiles/files/coin-master-hack-ios-app_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_off00004c13.bin` `c421d12c1a9516f6463ab6b8177fab41ab78d639db9910b92a39c8f08acd5e43`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4C13	26328 bytes
`font_01_sfnt_off000085b0.bin` `6316af01e653c53aa8313e9ee065e63d320a9dd1c98e4ac08eccbec55cd1c79a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x85B0	17996 bytes

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