Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a7bfe598949d968…

MALICIOUS

PDF

45.0 KB Created: 2021-05-16 07:02:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 21014a8de042e429f7b9690aed1d505c SHA-1: 2c813059db2ceba20902ca43cbc141f7f56a85e0 SHA-256: 7a7bfe598949d9685a839a6a01a9a5fe2e4174919ae4d6e2923d57553554cddf
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are structured as SEO-friendly URLs pointing to game hacks and cheats. One of the primary links directs to a URL that appears to be a download or exploit page. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent. The presence of numerous links suggests a link farm designed to distribute malware or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/406889139/coin-master-free-raid-link-game-hack
    • http://whiteyaknepal.com/userfiles/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdf
    • http://whiteyaknepal.com/userfiles/files/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdf
    • http://whiteyaknepal.com/userfiles/files/coin-master-spin-hack_GM406889139.pdf
    • http://whiteyaknepal.com/userfiles/files/free-robux-without-doing-anything_GM431946152.pdf
    • http://whiteyaknepal.com/userfiles/files/free-spin-coin-master-iphone_GM406889139.pdf
    • http://whiteyaknepal.com/userfiles/files/roblox-hacks-com_GM431946152.pdf
    • http://whiteyaknepal.com/userfiles/files/roblox-promo-codes-for-free-robux_GM431946152.pdf
    • http://whiteyaknepal.com/userfiles/files/coin-master-free-spins-hack_GM406889139.pdf
    • http://whiteyaknepal.com/userfiles/files/coin-free-master_GM406889139.pdf
    • http://whiteyaknepal.com/userfiles/files/roblox-zone-free-robux_GM431946152.pdf
    • http://whiteyaknepal.com/userfiles/files/coin-master-free-spins-hack-link_GM406889139.pdf
    • http://whiteyaknepal.com/userfiles/files/coin-master-free-spins-app-android_GM406889139.pdf
    • http://whiteyaknepal.com/userfiles/files/robloxfun-com-robux_GM431946152.pdf
    • http://whiteyaknepal.com/userfiles/files/coin-master-in-app-purchase-hack_GM406889139.pdf
    • http://whiteyaknepal.com/userfiles/files/games-that-give-free-robux_GM431946152.pdf
    • http://whiteyaknepal.com/userfiles/files/coin-master-free-spins-23-march-2021_GM406889139.pdf
    • http://whiteyaknepal.com/userfiles/files/coin-master-unlimited-spin-apk-free-download_GM406889139.pdf
    • http://whiteyaknepal.com/userfiles/files/rbxoffers-com-free-robux_GM431946152.pdf
    • http://whiteyaknepal.com/userfiles/files/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdf
    • http://whiteyaknepal.com/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000496d.bin
3ff309b27ad381663472e19c305b85dd4c02b48b938d5526ece07b9c354fcb06		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x496D 24752 bytes
font_01_sfnt_off0000822a.bin
1dd933c112880b232546f3aab6a17784a8f412d39fd551cc6eb31c5a04c3ce57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x822A 3380 bytes
font_02_sfnt_off00008e12.bin
3998902dea0a1511998df8e4d0917a6d623b740f67104cdc3b2e87c7f30b8a0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E12 18056 bytes

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