PDF malware analysis — malicious · 26d29a04638926ca

MALICIOUS

PDF

35.4 KB Created: 2021-07-04 09:42:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16

MD5: 354b5abf38d54d885ec1d82fd780bbe4 SHA-1: bd80f606c2922490ba59abfad68722f44ae3a9f8 SHA-256: 26d29a04638926cae5e61e1b06e90ecdcfe8dd27d3e5aaea62ae713e9deeeb4a

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links to external websites, many of which are hosted on stylafik.in and offer 'free' game-related items or hacks. One prominent URL, http://netcdn.tw/app/431946152/free-roblox-accounts-game-hack, suggests a lure for potentially malicious downloads or scams. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm heuristic further supports a malicious intent to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-roblox-accounts-game-hack PDF link annotation
- https://www.stylafik.in/uploaded_files/userfiles/files/coin-master-code-for-free-spins_GM406889139.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/coin-master-time-speed-hack_GM406889139.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/how-to-hack-old-accounts-roblox_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/how-to-become-famous-on-tiktok-free_GM835599320.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/free-passwords-for-roblox_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/free-robux-hack-no-download-2021_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/roblox-free-download-for-windows-10_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/get-free-tiktok-followers-app_GM835599320.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/free-gift-cars-for-roblox_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/cheat-engine-64-roblox-bypass_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/break-free-id-roblox_GM431946152.pdfIn PDF document text
- https://www.stylafik.in/uploaded_files/userfiles/files/free-spins-coins-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
`font_00_sfnt_off000031ff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x31FF	23028 bytes
SHA-256: `be4b456fd323583e4a95c50149210f978b3e4a216f5f13ffade97ab558a46296`
`font_01_sfnt_off000065d5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x65D5	18896 bytes
SHA-256: `dca2f27ecdd8c5a39a81753fb954dd30ae74f07dc947ace6cc80d7c98cb68ba8`

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