Malicious PDF — malware analysis report

Static analysis result for SHA-256 5513edad9432dc23…

MALICIOUS

PDF

35.3 KB Created: 2021-06-20 01:56:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: c11949f78c02c36e6a4f816089a97eb5 SHA-1: 4186b1498e84ae6e320294c6a0b6cf4838b3d958 SHA-256: 5513edad9432dc235d68c7b27ce4a90a35fa103fd83cbeb4f0b1528481fe3eb6
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which appear to be part of a link farm designed to attract users searching for game cheats and free currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, and the 'ML_NYX_PDF_MALICIOUS' classifier strongly suggests malicious intent. The document body, though partially obfuscated, contains phrases related to free game resources, reinforcing the lure.

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-working-roblox-robux-codes-2021-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/roblox-hacked-version-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/what-is-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spin-2912-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/daily-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-anything-from-catalog-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-in-skywars-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-4l-tiktok_GM835599320.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-exploit-that-lets-you-use-gears_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-ho-to-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-vip-roblox_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_off0000311c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x311C 22188 bytes
SHA-256: 6a11928f8581df3bc96d2b5dad31d2fbbc0f4d111e40609fb099b25fdaa8ef27
font_01_sfnt_off00006279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6279 19856 bytes
SHA-256: b43ae977191793e94f605881984714bb8d9eb27e6afaa6983c9a2da746b5a101

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