Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5147f0848250b87…

MALICIOUS

PDF

34.4 KB Created: 2021-07-07 23:24:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a9ff045d2a75188ac16312c20fe0f7aa SHA-1: a7ed5a43771b1776032eeabb829695da00578573 SHA-256: c5147f0848250b8700b3e5176a21c308bc2f0eeab137062dcec43c60b0e52374
102 Risk Score

Malware Insights

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

The PDF document contains numerous links, including one pointing to 'minecraft-pe-free-download-android-game-hack', and exhibits characteristics of a link farm designed to direct users to external resources. The ML classifier also flagged this PDF as malicious with high confidence. These findings suggest the document's primary purpose is to facilitate the download of potentially unwanted or malicious software.

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.tw/app/479516143/minecraft-pe-free-download-android-game-hack
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/does-roblox-give-you-free-robux-on-your-birthday_GM431946152.pdf
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/free-robux-no-password-no-human-verification_GM431946152.pdf
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/how-to-get-free-vip-in-miner-tycoon-roblox_GM431946152.pdf
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/how-do-you-get-free-robux-without-paying_GM431946152.pdf
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-game-free_GM406889139.pdf
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/cheat-roblox-madcity-money_GM431946152.pdf
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/roblox-free-download-no-sign-up_GM431946152.pdf
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/roblox-destruction-simulator-hack_GM431946152.pdf
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/free-robux-discord_GM431946152.pdf
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/how-do-you-get-free-roblox_GM431946152.pdf
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-free-spins-coins_GM406889139.pdf
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/roblox-infinite-jump-hack-download-2021_GM431946152.pdf
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-free-spins-blogspot_GM406889139.pdf
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/how-to-change-your-password-on-roblox-for-free-2021_GM431946152.pdf
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/hacks-master-coin_GM406889139.pdf
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/games-to-get-free-robux_GM431946152.pdf
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/assassin-always-jumping-hack-roblox_GM431946152.pdf
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/how-to-hack-in-jailbreak-roblox-2021_GM431946152.pdf
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/roblox-hack-password-free-download_GM431946152.pdf
    • https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/pokemon-go-free-raid-passes-2021_GM1094591345.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031b8.bin
0995b02ec5e0e8c289e9e1520c9bf5f8e2649b7a6cccd0c1a22c68b265808dbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31B8 22092 bytes
font_01_sfnt_off0000629c.bin
1b521314cee390b0c0a345489da1d656bc9d64788a2af6148fba408b315dd9f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x629C 18732 bytes

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