Malicious PDF — malware analysis report

Static analysis result for SHA-256 180fcf53fae38132…

MALICIOUS

PDF

35.0 KB Created: 2021-06-30 13:15:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: aa382ad1b0fae1a6d9565c86bbade0cb SHA-1: 39504519dabb18c3508448c86eb7372d7cb48f95 SHA-256: 180fcf53fae38132abeeb268292cca01e7cd3ab563fb367d11ca7c91c7a4d9df
142 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 PDFs promising game cheats and hacks. The document body and heuristics indicate a lure to download content, potentially leading to malware. The presence of 'how-to-hack-roblox-using-cmd-game-hack' in the document body and associated URL suggests an attempt to trick users into executing commands or downloading malicious files. While no scripts were directly extracted, the nature of the content and the ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/how-to-hack-roblox-using-cmd-game-hack
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/get-free-roblox-robux-generator_GM431946152.pdf
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/roblox-pizza-cheat-engine-script_GM431946152.pdf
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/2021-free-robux-daily-robuxian_GM431946152.pdf
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/como-hackear-coin-master-ios_GM406889139.pdf
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/free-roblox-injectos_GM431946152.pdf
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021-no-verification_GM431946152.pdf
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/get-robux-for-free-2021_GM431946152.pdf
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/minecraft-story-mode-free_GM479516143.pdf
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdf
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/roblox-promo-codes-free-robux_GM431946152.pdf
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/legitimate-coin-master-free-spins-apk_GM406889139.pdf
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-download_GM406889139.pdf
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/hack-to-protect-village-on-coin-master_GM406889139.pdf
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/roblox-free-play-no-download-on-ipad_GM431946152.pdf
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021_GM406889139.pdf
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/coin-master-instagram-free-spins_GM406889139.pdf
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/free-coins-on-coin-master_GM406889139.pdf
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/coin-master-spin-rewards_GM406889139.pdf
    • https://elearning.man1karawang.sch.id/__statics/gudangsoal/files/how-to-earn-robux-fast_GM431946152.pdf
    • http://netcdn.co/app/431946152/how-to-hack-rob
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031ae.bin
d65b22034245884580b6410a14dde390b7ef470887142603386782f18adc8a1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31AE 22120 bytes
font_01_sfnt_off000062ef.bin
34819c56149d29581769404c63b157be73a48ceb21d5641fad12fc0d558b28bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62EF 19376 bytes

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