PDF malware analysis — malicious · 3febc3cd4d11dd9f

MALICIOUS

PDF

36.1 KB Created: 2021-06-29 06:32:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 42c9932992af0e3f118103b11f9daafd SHA-1: 01410de38323a047efada6aeb8f146ac2a19a781 SHA-256: 3febc3cd4d11dd9f950ed72b6389180962ea4f517a1ccdaf7f36ddcaba9711af

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous external links, many of which are structured as SEO-optimized links pointing to files related to game hacks and free accounts. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to distribute malicious content or engage in SEO poisoning. The document body itself contains a primary URL that also appears to be a lure for downloading game-related 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.co/app/431946152/roblox-shirt-template-download-free-shipping-game-hack PDF link annotation
- https://www.vadai.sg/uploaded_files/userfiles/files/free-roblox-accounts-for-gampass-for-ultimate-driving-simulator_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/get-free-robux-gg_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/hacks-for-booga-booga-roblox-2021_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/tiktok-free-account_GM835599320.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/how-to-hack-people-on-roblox-without-downlaods_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/no-scam-free-robux_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/roblox-free-gears-hat-faces-clothes_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/coin-master-free-mighty-lion-card_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/roblox-hack-scripts-jailbreak_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/tiktok-free-make-your-day_GM835599320.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/roblox-games-for-free-no-download_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/roblox-jailbreak-hack-redboy_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_off0000327f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x327F	22884 bytes
SHA-256: `3933e6b5f29206a89aff1347e32a83b70fffca1d8d4f606ffb5aced8ddb9ce39`
`font_01_sfnt_off0000659d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x659D	19984 bytes
SHA-256: `5cd9a1bf06e8f1237425b043c9181e322d5500f0b4f43b68f34d493be3a8b601`

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