Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa256d1fba345c04…

MALICIOUS

PDF

43.3 KB Created: 2021-06-03 06:27:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 835d4e1539904904c56277c03e896878 SHA-1: 4fa36b2b85e3dafbb07c92157a2e0421f63f2098 SHA-256: fa256d1fba345c04b8d171b64c9ff3fd880680356aeb48ffe72d8fad4c000606
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous external links, many of which are SEO-optimized and point to game hacking tools and exploits. The presence of a 'download button' heuristic further suggests a malicious intent to trick users into downloading potentially harmful content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/coin-master-hack-spin-generator-tool-game-hack
    • https://library.sman1berau.sch.id/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-2021_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/coin-master-hack-app-link_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/coin-master-daily-free-spins-link-download_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/minecraft-online-free-no-download_GM479516143.pdf
    • https://library.sman1berau.sch.id/repository/coin-master-shield-hack_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/haktuts-coin-master-free-spin-link_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/free-coin-master-spins-for-today_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/free-robux-promo-codes-2021_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/minecraft-free-online_GM479516143.pdf
    • https://library.sman1berau.sch.id/repository/how-to-get-java-minecraft-for-free_GM479516143.pdf
    • https://library.sman1berau.sch.id/repository/coin-master-hack-online-android_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/free-robux-without-downloading-anything_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/how-to-get-minecraft-for-free-on-computer_GM479516143.pdf
    • https://library.sman1berau.sch.id/repository/coin-master-hack-tool-without-human-verification_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/coin-master-hack-tool-no-human-verification_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/roblox-promo-codes-for-free-robux_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/free-tiktok-followers-no-downloads_GM835599320.pdf
    • https://library.sman1berau.sch.id/repository/free-coin-master-hack-no-verification_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005013.bin
8ac5a26bd46d40dc564939e93bd79e4d17a90eb5fac717f9e224957a08e9293e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5013 24480 bytes
font_01_sfnt_off0000875a.bin
ea67d54f04c33a937dae932ca1fc44fc221a1b4b4b4a53e5a275faf6159c5a59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x875A 17968 bytes

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