Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c704d1a7efc04f0…

MALICIOUS

PDF

35.3 KB Created: 2021-07-06 17:11:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6a19c3e7d8151f281ce62953d78533d7 SHA-1: a49da25601114591273b2f3c2d3bc5c7ddb476ae SHA-256: 4c704d1a7efc04f033ed1ec6a0839aea4b5014c1d0425aff0afb7b0145739671
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 and promise free in-game currency or hacks for popular games like Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to drive traffic to potentially malicious or scam-related sites. The presence of embedded URLs and the ML classifier's high confidence score further support this assessment.

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/406889139/free-spins-on-coin-master-2021-game-hack
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/free-robux-codes-no-verification-2021_GM431946152.pdf
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/howto-hack-gear-in-the-roblox-catalog_GM431946152.pdf
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/hack-de-roblox-counter-blox_GM431946152.pdf
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-for-robux_GM431946152.pdf
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/free-spins-generated-from-coin-master_GM406889139.pdf
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-with-pastebin-2021_GM431946152.pdf
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/buy-robux-free_GM431946152.pdf
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/free-savage-roblox_GM431946152.pdf
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/script-for-steves-one-piece-roblox-hack-max-stats_GM431946152.pdf
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/coin-master-free-spin-codes_GM406889139.pdf
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/how-can-i-get-free-robux_GM431946152.pdf
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/coin-master-hack-mod-game-download_GM406889139.pdf
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/minecraft-bedrock-free-server-hosting_GM479516143.pdf
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/get-free-robux-today_GM431946152.pdf
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/free-spins-coin-master-hack_GM406889139.pdf
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/hack-dinero-en-roblox_GM431946152.pdf
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/free-roblox-acouts-full-with-robucks_GM431946152.pdf
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-link_GM406889139.pdf
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/minecraft-pocket-edition-free-apk_GM479516143.pdf
    • http://elearning5.mts-mifdakpj.sch.id/__statics/gudangsoal/files/www-claim-gg-to-earn-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032e0.bin
0cb91245e99b047cde8b3f0dfa1303bb284b5ca312cc064b5def42b779fed508		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32E0 22916 bytes
font_01_sfnt_off0000668d.bin
592e144e19b3a0fb235169ea68d8700deb7f7882d554043d1d7a76374456614b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x668D 18576 bytes

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