PDF malware analysis — malicious · 983ffae8c9c29e28

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 06:15:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: e0757a719cc40b8c09f6e612226c3542 SHA-1: 8c98841e43f1f21a9b63d2eb2f21618447375250 SHA-256: 983ffae8c9c29e28f5b6d6404e9ec471604b89f075a7aec223d2fc5fdb19d5d1

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous embedded URLs and a document body that explicitly advertises hacks and cheats for games, such as 'Roblox Jailbreak Hack Download'. The heuristic findings indicate a mass of external PDF links, suggesting a link farm designed to host or redirect to malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of download-related phrases reinforces the lure.

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.online/app/431946152/roblox-jailbreak-hack-download-game-hack PDF link annotation
- https://mountainholidaytreks.com/userfiles/files/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
- https://mountainholidaytreks.com/userfiles/files/free-coins-for-flip-master-online_GM406889139.pdfIn PDF document text
- https://mountainholidaytreks.com/userfiles/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
- https://mountainholidaytreks.com/userfiles/files/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
- https://mountainholidaytreks.com/userfiles/files/free-pe_GM479516143.pdfIn PDF document text
- https://mountainholidaytreks.com/userfiles/files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
- https://mountainholidaytreks.com/userfiles/files/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
- https://mountainholidaytreks.com/userfiles/files/coin-master-free-spins-without-human-verification_GM406889139.pdfIn PDF document text
- https://mountainholidaytreks.com/userfiles/files/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
- https://mountainholidaytreks.com/userfiles/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://mountainholidaytreks.com/userfiles/files/coin-master-gold-cards-hack-english_GM406889139.pdfIn PDF document text
- https://mountainholidaytreks.com/userfiles/files/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
- https://mountainholidaytreks.com/userfiles/files/free-robux-meme_GM431946152.pdfIn PDF document text
- https://mountainholidaytreks.com/userfiles/files/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
- https://mountainholidaytreks.com/userfiles/files/is-roblox-hacked_GM431946152.pdfIn PDF document text
- https://mountainholidaytreks.com/userfiles/files/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
- https://mountainholidaytreks.com/userfiles/files/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
- https://mountainholidaytreks.com/userfiles/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://mountainholidaytreks.com/userfiles/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
- https://mountainholidaytreks.com/userfiles/files/how-to-download-minecraft-for-free-on-mac_GM479516143.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_off000050f7.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x50F7	26520 bytes
SHA-256: `cea5fe33afeb5ef26e38ee9c4be25c9c7c0a7a18ffddc438631a34b99ba45617`
`font_01_sfnt_off00008ce4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8CE4	18972 bytes
SHA-256: `261da8cecf88d9fe7cdfdd42a26ac06d4c96d8a11aebf729db611f6a559eb8d5`

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