PDF malware analysis — malicious · 8d22b3e34fbc6ede

MALICIOUS

PDF

45.7 KB Created: 2021-06-10 12:50:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 95f2542f6acfe270f16d855d9f5e4cfe SHA-1: 9177658db1f2c2af05f9cf40ce5dd968371c5cee SHA-256: 8d22b3e34fbc6ede7043bb1c87dc13537a2b3eb56f17ae3680b4c74b70c82051

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a link farm, embedding numerous URLs that lead to other PDF files, many of which appear to be related to game cheats or hacks. The presence of a call-to-action phrase and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. No scripts were extracted from this sample.

Machine Learning

Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/how-do-you-get-robux-for-free-on-phone-game-hack PDF link annotation
- https://linhkien247.vn/public/upload/files/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/coin-master-daily_GM406889139.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/minecraft-pe-apk-download-free-015-0_GM479516143.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/coin-master-spin-hack-app_GM406889139.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/cheats-for-city-arcatect-roblox_GM431946152.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/is-roblox-studio-free_GM431946152.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/free-robux-script_GM431946152.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/how-to-get-free-clothes-and-hair-on-roblox_GM431946152.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/free-robux-no-human-verification-or-survey_GM431946152.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_004_off00005306.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5306	26724 bytes
SHA-256: `e401a9cbb93dab3f807f8e8a8f7b37fcd097374eab5eebe19aae45b2f0e9b0ac`
`font_01_sfnt_off00008e4f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E4F	18932 bytes
SHA-256: `3dee018556291b25cec05e550cbf196635d8bb411d70b9516fd4da60a22332c9`

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