Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb0fae59d22703fa…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 12:43:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 886ac68f6f05310deb848e4589f70699 SHA-1: 3096d4b0556b0ca43abf15ffb0c225cc802de13a SHA-256: fb0fae59d22703fa68908a284cf73dcf554f79aafac9f3988f74a545da2b5238
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are SEO-optimized to appear as legitimate resources for obtaining free in-game items. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or malware distribution 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.tw/app/431946152/free-robux-without-human-verification-2021-game-hack
    • http://libsmpn1balongpo.sch.id//repository/how-to-hack-any-roblox-account_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/coin-master-game-free-spin-download_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/irobux-com-redeem_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id/repository/free-minecraft-pe-server_GM479516143.pdf
    • http://libsmpn1balongpo.sch.id//repository/coin-master-daily-free-spins-2021_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id/repository/list-of-free-robux-codes_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/robux-hack-no-human-verification_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/free-spins-coin-master-daily_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id/repository/cheat-engain-mac-for-roblox_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-minecraft-coins-for-free_GM479516143.pdf
    • http://libsmpn1balongpo.sch.id//repository/free-robux-human-verification_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/coin-master-hack-tool-download_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/give-me-robux_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/collect-free-spins-coin-master_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/how-do-you-get-free-roblox-money_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/free-robux-com_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/rbx-place-free-robux_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/minecraft-hacked-client-112-2_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003030.bin
09d9fb89a5e0fd6c7acf710e4125a6aa756e6e0f6c0c629306f325e54bc6202b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3030 21836 bytes
font_01_sfnt_off0000607b.bin
224766b145fea2ee77d6018406834ac88e8b97acd6b6511a2b41135dc58ea70f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x607B 20100 bytes

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