Malicious PDF — malware analysis report

Static analysis result for SHA-256 87e684a3cdd6f9c4…

MALICIOUS

PDF

46.0 KB Created: 2021-05-16 14:33:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5544109d5f9661d01a69544dee05eaac SHA-1: 9d775722a2016ccd3f3d978d13bc1671300f9914 SHA-256: 87e684a3cdd6f9c4c075bbcf1bbdc6d0d5291ee84ab6c43c8a26f9b8c1c352de
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links and a primary external URI, all pointing to sites offering game-related downloads like 'Minecraft Bedrock' or 'Robux'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a link farm designed to attract users searching for cheats or free in-game currency. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/479516143/download-minecraft-bedrock-game-hack
    • http://www.meslekpatent.com/images/daily-coin-master-free-spins_GM406889139.pdf
    • http://www.meslekpatent.com/images/robux-free-gift-card_GM431946152.pdf
    • http://www.meslekpatent.com/images/how-to-use-wurst_GM479516143.pdf
    • http://www.meslekpatent.com/images/how-to-change-roblox-username-for-free-2021_GM431946152.pdf
    • http://www.meslekpatent.com/images/download-minecraft-free-hiapphere_GM479516143.pdf
    • http://www.meslekpatent.com/images/best-free-minecraft-server-hosting_GM479516143.pdf
    • http://www.meslekpatent.com/images/free-robux-app-2021_GM431946152.pdf
    • http://www.meslekpatent.com/images/coin-master-spin-hack-app_GM406889139.pdf
    • http://www.meslekpatent.com/images/how-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://www.meslekpatent.com/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • http://www.meslekpatent.com/images/easy-robux-hack_GM431946152.pdf
    • http://www.meslekpatent.com/images/how-to-get-minecraft-for-free-2021_GM479516143.pdf
    • http://www.meslekpatent.com/images/roblox-free-robux-no-verification_GM431946152.pdf
    • http://www.meslekpatent.com/images/coin-master-unlimited-spin-link_GM406889139.pdf
    • http://www.meslekpatent.com/images/how-to-hack-to-get-robux_GM431946152.pdf
    • http://www.meslekpatent.com/images/moon-static-coin-master-generator-hacks-free_GM406889139.pdf
    • http://www.meslekpatent.com/images/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdf
    • http://www.meslekpatent.com/images/how-to-hack-in-arsenal_GM431946152.pdf
    • http://www.meslekpatent.com/images/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdf
    • http://www.meslekpatent.com/images/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d3b.bin
0df65a3cd3e043a51abab2f9304d6fa18155c178c0c67e8c152fa8f82136413e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D3B 25100 bytes
font_01_sfnt_off0000868e.bin
96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689		 pdf-font-stream PDF embedded font (sfnt) at offset 0x868E 2820 bytes
font_02_sfnt_off0000902f.bin
7f86fed3984d6e1feedcbbb61174a74a8b6ed0af1ebcb464883137ac5d5df4fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x902F 18676 bytes

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