PDF malware analysis — malicious · 021d61634a1f4a3a

MALICIOUS

PDF

42.4 KB Created: 2021-05-13 00:39:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13

MD5: 50f1d46acd0cacbd18d49e34259358dc SHA-1: 6cbe4bc4db5ce3fdd2a354a0c426c21a005d0cc3 SHA-256: 021d61634a1f4a3ab74cb2186d66bdedfd60a367b674844f5c7a7c10200bb3df

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm designed to attract users with promises of game cheats and rewards. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs and a call-to-action button further supports a malicious intent to redirect users to potentially harmful content or downloads. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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/431946152/roblox-rewards-robux-game-hack PDF link annotation
- https://www.cinemapalace.ro/trailer/files/games-that-give-free-robux_GM431946152.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/can-you-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/free-robux-codes-generator_GM431946152.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
- https://www.cinemapalace.ro/trailer/files/cute-free-hair-on-roblox_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
`font_00_sfnt_off00004832.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4832	25316 bytes
SHA-256: `5f9adea4c7fcee1c6765b350d00b0c390fda554e4d54102ce66fb9b11958dca8`
`font_01_sfnt_off00008257.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8257	18492 bytes
SHA-256: `f54db345ef6a05ddcc33e39b82b6da332f4d0f4ab5c2582a6db6f23f2eda51df`

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