Malicious PDF — malware analysis report

Static analysis result for SHA-256 0033dd2bbe41c342…

MALICIOUS

PDF

34.6 KB Created: 2021-06-30 17:58:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 73aa5996588ce064aca5caa996561be6 SHA-1: 4c37f289799d46b02851ca3f8e373a73db524599 SHA-256: 0033dd2bbe41c3426b7e45005e53dc84e9f33f0d04630f5835cf54d800f07a66
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external resources, many of which are SEO-optimized pages promising free in-game currency or hacks for popular games. The presence of a PDF_SEO_LINK_FARM heuristic indicates a large number of these links, suggesting a link farm designed to attract users searching for cheats or free items. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious nature of the file. The document body contains a primary URL that likely leads to a malicious application or further phishing content.

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/free-unused-robux-codes-2021-game-hack PDF link annotation
    • https://library.stikeswnpalu.ac.id/repository/hacks-to-steal-robux-sign-up_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/hack-para-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-gray-hair-accessories-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/proxy-download-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-org-wee-bl-y-com_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-cash-script-ultimate-driving-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-script-pastebin-10-29-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-tiktok-hearts_GM835599320.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/get-me-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-piano-hack_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_off00002f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F43 22404 bytes
SHA-256: be1ea54ecf792509a2950a2d9bdce04ae74311aca9e93bfccf66264744ab6009
font_01_sfnt_off00006123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6123 19292 bytes
SHA-256: 37f36b9c0e40cdde68dea300f1c3551cb55ed030b25c3d226922973b29946a62

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