Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aa829cacfd147bb…

MALICIOUS

PDF

35.1 KB Created: 2021-07-01 21:46:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 76a8e84addda94d09417868f9a39d1c7 SHA-1: 75648723b0faa6b7ec732f8a301e245212e847be SHA-256: 5aa829cacfd147bb89224161180773fecaf2096d0f6a82ec47e7bdd9d23aa974
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains numerous links to external resources, many of which are presented as 'hacks' or 'cheats' for popular games. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting a malicious intent to direct users to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious, reinforcing the assessment that it is designed to trick users into downloading or visiting malicious sites.

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.co/app/431946152/hack-para-roblox-2021-game-hack PDF link annotation
    • https://library.stikeswnpalu.ac.id/repository/how-to-get-hacked-roblox-account_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-hack-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/pubg-uc-myanmar_GM1330123889.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-do-you-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/como-descargar-hacks-para-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/robux-hack-apk-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-gift-cards-robux-codes_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/gamesofficenet-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-cheat-roblox-lumber-tycoon-2-money_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/robux-today_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/hacks-para-robar-todo-sin-hacer-nada-en-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/robux-for-free-website_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-hack-legend-of-the-bone-sword-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-get-a-shirt-for-free-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-promo-codes-2021-not-expired_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-invite-friends-free-spins_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3201 22240 bytes
SHA-256: 098fd0c55a99a4352dc384868618e7fbb52be402a409e94201c6aaaa9389dc85
font_01_sfnt_off0000639b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x639B 19212 bytes
SHA-256: e2655de1b482607fb6af9768ab197dee96c5c06c4f979b26c3c21a76dbca8108

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