PDF malware analysis — malicious · de93c8ef6251c1d2

MALICIOUS

PDF

35.1 KB Created: 2021-07-01 20:09:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 3e93663bae2b2c30a883e36cd2512019 SHA-1: e818ec1a6cc24505823cc23f0684b33b492f7861 SHA-256: de93c8ef6251c1d2b81a7610f09fb6a43d9e9d1323b045aafcc3142a9df43d09

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 are SEO-optimized and point to pages offering in-game currency or hacks. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to direct users to potentially harmful content or exploit kits. The document body, though partially corrupted, contains keywords related to 'Roblox' and 'free followers', reinforcing the lure.

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/free-roblox-followers-no-survey-game-hack PDF link annotation
- https://htdvn.com/public/upload/files/free-roblox-money-no-survey_GM431946152.pdfIn PDF document text
- https://htdvn.com/public/upload/files/how-to-hack-a-person-on-roblox-2021_GM431946152.pdfIn PDF document text
- https://htdvn.com/public/upload/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
- https://htdvn.com/public/upload/files/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
- https://htdvn.com/public/upload/files/games-that-give-free-items-roblox_GM431946152.pdfIn PDF document text
- https://htdvn.com/public/upload/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
- https://htdvn.com/public/upload/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
- https://htdvn.com/public/upload/files/pokemon-go-free-codes-october-2021_GM1094591345.pdfIn PDF document text
- https://htdvn.com/public/upload/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://htdvn.com/public/upload/files/hack-ninja-legends-roblox_GM431946152.pdfIn PDF document text
- https://htdvn.com/public/upload/files/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
- https://htdvn.com/public/upload/files/dupe-hack-roblox-booga-booga_GM431946152.pdfIn PDF document text
- https://htdvn.com/public/upload/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
- https://htdvn.com/public/upload/files/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
- https://htdvn.com/public/upload/files/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
- https://htdvn.com/public/upload/files/how-to-hack-your-level-in-boku-no-roblox_GM431946152.pdfIn PDF document text
- https://htdvn.com/public/upload/files/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
- https://htdvn.com/public/upload/files/roblox-hack-loaderexe_GM431946152.pdfIn PDF document text
- https://htdvn.com/public/upload/files/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
- https://htdvn.com/public/upload/files/free-cool-stuff-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_off0000324c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x324C	22080 bytes
SHA-256: `c2144c140c8068de9ddf19de10ac81adfe4e058fe394fd228964026ad7951446`
`font_01_sfnt_off0000635e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x635E	19248 bytes
SHA-256: `764d888c320c81686f2bbbea6c2171eb7324db7d45e3436ef63d7db9e24b9df5`

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