PDF malware analysis — malicious · 1c54579d10d8b5b4

MALICIOUS

PDF

46.6 KB Created: 2021-05-18 03:01:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 982a332ff0a6539a9f69dc3d3727d8cd SHA-1: f4d082d09944ab6b35ebbae9769e1b443740b3ae SHA-256: 1c54579d10d8b5b47f04a5ac084a239d5c9d2838133873e1639add75026103a3

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, identified as a "PDF_SEO_LINK_FARM", directing users to websites that promise game cheats and virtual currency. The primary URL, https://netcdn.xyz/app/431946152/free-robux-hack-us-game-hack, is a strong indicator of a malicious lure. While no scripts were explicitly extracted, the structure and heuristics suggest this PDF is designed to drive traffic to potentially malicious sites, likely as part of a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.8948

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/free-robux-hack-us-game-hack
- https://www.wellonaindia.com/uploaded_files/userfiles/files/coin-master-computer-hack_GM406889139.pdf
- https://www.wellonaindia.com/uploaded_files/userfiles/files/real-free-spins-for-coin-master_GM406889139.pdf
- https://www.wellonaindia.com/uploaded_files/userfiles/files/free-spin-app-coin-master_GM406889139.pdf
- https://www.wellonaindia.com/uploaded_files/userfiles/files/free-spins-coin-master-hack_GM406889139.pdf
- https://www.wellonaindia.com/uploaded_files/userfiles/files/free-robux-gift-card-generator_GM431946152.pdf
- https://www.wellonaindia.com/uploaded_files/userfiles/files/how-to-hack-coin-master-facebook_GM406889139.pdf
- https://www.wellonaindia.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-android_GM431946152.pdf
- https://www.wellonaindia.com/uploaded_files/userfiles/files/coin-master-codes_GM406889139.pdf
- https://www.wellonaindia.com/uploaded_files/userfiles/files/weird-roblox_GM431946152.pdf
- https://www.wellonaindia.com/uploaded_files/userfiles/files/how-to-get-unlimited-robux_GM431946152.pdf
- https://www.wellonaindia.com/uploaded_files/userfiles/files/coin-master-game-hack-app_GM406889139.pdf
- https://www.wellonaindia.com/uploaded_files/userfiles/files/daily-coin-master-free-spin-apk_GM406889139.pdf
- https://www.wellonaindia.com/uploaded_files/userfiles/files/promo-codes-to-get-free-robux_GM431946152.pdf
- https://www.wellonaindia.com/uploaded_files/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdf
- https://www.wellonaindia.com/uploaded_files/userfiles/files/coin-master-freebies_GM406889139.pdf
- https://www.wellonaindia.com/uploaded_files/userfiles/files/free-robux-survey_GM431946152.pdf
- https://www.wellonaindia.com/uploaded_files/userfiles/files/jailbreak-script_GM431946152.pdf
- https://www.wellonaindia.com/uploaded_files/userfiles/files/free-robux-no-verification-at-all_GM431946152.pdf
- https://www.wellonaindia.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
- https://www.wellonaindia.com/uploaded_files/userfiles/files/free-robux-no-verification-no-download-2021_GM431946152.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004e8a.bin` `36841c71addf77e125577fdbeac2c2a8c388ae0b7395dcb262aa06c587c1f0bc`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4E8A	25096 bytes
`font_01_sfnt_off000088e1.bin` `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x88E1	2880 bytes
`font_02_sfnt_off000092cc.bin` `be32b0f906764c1f2317decc7ac5a24a5975e1ace61028a3a9703984df87bb8b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x92CC	18600 bytes

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