PDF malware analysis — malicious · d41902b5deb17490

MALICIOUS

PDF

45.8 KB Created: 2021-05-14 08:22:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 17681a2ecba8d4e100397c25bf66b4b9 SHA-1: c551bfbcb0686de2c4e11709320b38a6f58706a0 SHA-256: d41902b5deb174907ad04c1689096a83aed5bb98a7fb775f882ceac11dcb7a47

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The primary URL, https://netcdn.xyz/app/406889139/daily-spin-game-hack, suggests a lure related to game hacks or cheats. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the embedded links and the heuristic firings indicate a likely attempt to redirect users to malicious or spam content, potentially as part of a phishing or SEO poisoning campaign.

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/406889139/daily-spin-game-hack
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/coin-master-free-spin-daily-link_GM406889139.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/coin-master-free-spins-hack-2021_GM406889139.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-redeem-code-for-coin-master_GM406889139.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/coin-master-free-snacks-link_GM406889139.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/coin-master-hack-apk_GM406889139.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-roblox-girl-clothes_GM431946152.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/adopt-me-roblox-hacks_GM431946152.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-coin-master-hacks-no-verification_GM406889139.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-robux-discord_GM431946152.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/roblox-hack-tool_GM431946152.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/how-to-hack-to-get-robux_GM431946152.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/download-hack-coin-master-apk_GM406889139.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-verification_GM431946152.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/coin-master-daily-free-coins-link_GM406889139.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/rbx-hut-promo-codes_GM431946152.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/10-free-spins-coin-master_GM406889139.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-mobile_GM431946152.pdf
- https://www.trendsfashionusa.com/uploaded_files/userfiles/files/is-there-a-free-version-of-minecraft_GM479516143.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_off00004cb1.bin` `2acf8f8155dbff3cfac41c7c7e7490e744c8e9aaebc2b27467836ede0eeb9b92`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4CB1	25560 bytes
`font_01_sfnt_off000086fb.bin` `f5c28686dcaa6e4f5af5eb824d4c2910815e14a2156f8517a627a86c98a11a8a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x86FB	17896 bytes
`font_02_sfnt_off0000a7b3.bin` `e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA7B3	3264 bytes

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