Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed7e6d866af3e9dd…

MALICIOUS

PDF

42.5 KB Created: 2021-05-13 20:32:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9489db05b6a9407aa9a934683dc1edec SHA-1: d6dd3c460a01ac7c0c4b3bb7b87f35dc097c2df0 SHA-256: ed7e6d866af3e9ddb25410b527bc741c3b0fea6d2407088eb130925c6e3cb73e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a link farm, that direct users to websites promising free in-game items and hacks. The ML classifier strongly indicated maliciousness, and the document body itself contains a primary lure URL. The presence of these links suggests an attempt to drive traffic to potentially malicious sites for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/how-to-buy-robux-for-free-game-hack
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/free-spin-coin-master-2021_GM406889139.pdf
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/free-coin-master-spin-daily-link_GM406889139.pdf
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/free-robux-real-working_GM431946152.pdf
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/google-coin-master-free-spins_GM406889139.pdf
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/free-spin-in-coin-master_GM406889139.pdf
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/are-there-any-coin-master-hacks-that-actually-work_GM406889139.pdf
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-link-today_GM406889139.pdf
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/free-robux-by-watching-ads_GM431946152.pdf
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/minecraft-tower-defense-2-hacked_GM479516143.pdf
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/minecraft-pvp-hacks_GM479516143.pdf
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-codes_GM431946152.pdf
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/free-roblox-website_GM431946152.pdf
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-apk-download_GM406889139.pdf
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/coin-master-free-daily-spins_GM406889139.pdf
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/free-roblox-hack_GM431946152.pdf
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/roblox-pink-free-robux_GM431946152.pdf
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/free-unlimited-robux_GM431946152.pdf
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/how-to-earn-free-spins-coin-master_GM406889139.pdf
    • https://elearning.man3hss.sch.id/__statics/gudangsoal/files/coin-master-key-free-spin_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ac4.bin
4d085e30ee02cbf2557e5055a42a2505d149fc93e79ea01d8812623af161d2d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AC4 24692 bytes
font_01_sfnt_off000083a2.bin
42cf6025b0828d48dcef6abba26d08473f6f67d2383591dd07323470bab2f866		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83A2 18356 bytes

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