Malicious PDF — malware analysis report

Static analysis result for SHA-256 056a2af8629db4df…

MALICIOUS

PDF

35.3 KB Created: 2021-06-19 01:44:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: abc12aeeffd6547dffa3f730363cf36a SHA-1: c6b6a581ab5cebd599698757bcb470f81533d26e SHA-256: 056a2af8629db4df252e376cc932be5d3fe84d408e6c89dc0e1c08642c9d4b5f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a 'doc body' that mimics a lure for free game-related items, such as Roblox gift cards and Robux. The PDF_SEO_LINK_FARM heuristic indicates a large number of these links are generated to appear as legitimate SEO content, likely to direct users to malicious sites. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of this document.

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-roblox-gift-card-codes-2021-november-game-hack
    • http://perpus.ar-rum.ac.id//repository/free-robux-that-actually-works_GM431946152.pdf
    • http://perpus.ar-rum.ac.id/repository/free-printable-roblox-coloring-pages_GM431946152.pdf
    • http://perpus.ar-rum.ac.id/repository/roblox-mod-hack-apk-download_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/roblox-free-hats_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/free-spins-on-coin-master-game_GM406889139.pdf
    • http://perpus.ar-rum.ac.id/repository/roblox-hack-no-survey-or-human-verification-2021_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/roblox-script-hacks_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/is-there-an-actual-hack-that-work-for-coin-master_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/how-to-get-free-robux-promo-codes_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/free-spins-coin-master-2021_GM406889139.pdf
    • http://perpus.ar-rum.ac.id/repository/free-working-no-human-verification-roblox-card_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/free-robux-no-verification-2021-android_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/robux-codes-generator-no-human-verification_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/robux-free-robux_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/coin-master-free-coin-hack_GM406889139.pdf
    • http://perpus.ar-rum.ac.id/repository/roblox-free-radio-games_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/static-moonactive-net-rewards_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/how-to-win-free-robux_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/what-games-give-you-robux_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/how-to-hack-in-arsenal_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003122.bin
4967722a52efc7551eb1c2651c038128ff4895bc0e4e679bc733c60ecf728b3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3122 22196 bytes
font_01_sfnt_off00006282.bin
000e0b2334e51edb7c57b2e865a96ef5d16aa27754e3c3374ef85d13fa3a3f46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6282 19824 bytes

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