PDF malware analysis — malicious · 40a440084a58c960

MALICIOUS

PDF

42.7 KB Created: 2021-05-17 23:30:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16

MD5: 6eeda210ab60591c098434b9954054cb SHA-1: b2a925a774dda66ddfd8a861d654a980ac467b48 SHA-256: 40a440084a58c9606330e1fc06264425fe5a45d23964a23788aa96fc55ce9fe4

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various gaming-related cheat sites. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a call-to-action phrase suggests an attempt to trick users into clicking these links, likely leading to further malicious content or downloads.

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/free-pet-food-on-coin-master-game-hack PDF link annotation
- https://flyingchalks.com/ckfinder/userfiles/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text
- https://flyingchalks.com/ckfinder/userfiles/files/robux-free-com_GM431946152.pdfIn PDF document text
- https://flyingchalks.com/ckfinder/userfiles/files/cm-spins_GM406889139.pdfIn PDF document text
- https://flyingchalks.com/ckfinder/userfiles/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
- https://flyingchalks.com/ckfinder/userfiles/files/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
- https://flyingchalks.com/ckfinder/userfiles/files/free-spins-for-coin-masters_GM406889139.pdfIn PDF document text
- https://flyingchalks.com/ckfinder/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
- https://flyingchalks.com/ckfinder/userfiles/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
- https://flyingchalks.com/ckfinder/userfiles/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
- https://flyingchalks.com/ckfinder/userfiles/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
- https://flyingchalks.com/ckfinder/userfiles/files/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
- https://flyingchalks.com/ckfinder/userfiles/files/cute-free-roblox-clothes_GM431946152.pdfIn PDF document text
- https://flyingchalks.com/ckfinder/userfiles/files/como-hackear-coin-master-ios_GM406889139.pdfIn PDF document text
- https://flyingchalks.com/ckfinder/userfiles/files/coin-master-hack-mod-game-download_GM406889139.pdfIn PDF document text
- https://flyingchalks.com/ckfinder/userfiles/files/free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
- https://flyingchalks.com/ckfinder/userfiles/files/roblox-fun-com-robux_GM431946152.pdfIn PDF document text
- https://flyingchalks.com/ckfinder/userfiles/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
- https://flyingchalks.com/ckfinder/userfiles/files/free-robux-groups-2021_GM431946152.pdfIn PDF document text
- https://flyingchalks.com/ckfinder/userfiles/files/robux-for-offers_GM431946152.pdfIn PDF document text
- https://flyingchalks.com/ckfinder/userfiles/files/how-do-you-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004df0.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4DF0	24220 bytes
SHA-256: `4dbc0d01c4dab9f23ac9f561a47dfb1513f5381e012fc9d051d7830699e6e18d`
`font_01_sfnt_off0000855d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x855D	18040 bytes
SHA-256: `72696d2ffdfae0c11be198a3906a4703c512c64a5394f2f3ef3af6073f4420a0`

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