Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e4b35d4319d2365…

MALICIOUS

PDF

46.0 KB Created: 2021-06-10 14:33:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e73836efb052377a82777329c05e5824 SHA-1: a3bf0cd5758ca0d313c6306a9c360ad62fabc007 SHA-256: 6e4b35d4319d2365622a24c2de66f2daef1e8e767ee55cc627652343cc2330f7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are SEO-optimized and point to sites offering free game currency or accounts, indicating a link farm or scam operation. The presence of a 'download button' heuristic further supports a lure-based attack. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/free-roblox-accounts-june-2021-game-hack
    • https://elearning.ickendari.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey_GM431946152.pdf
    • https://elearning.ickendari.sch.id/__statics/gudangsoal/files/free-robux-codes_GM431946152.pdf
    • https://elearning.ickendari.sch.id/__statics/gudangsoal/files/how-to-get-free-tiktok-fans_GM835599320.pdf
    • https://elearning.ickendari.sch.id/__statics/gudangsoal/files/free-coins_GM406889139.pdf
    • https://elearning.ickendari.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-hack_GM431946152.pdf
    • https://elearning.ickendari.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdf
    • https://elearning.ickendari.sch.id/__statics/gudangsoal/files/coin-master-official-website_GM406889139.pdf
    • https://elearning.ickendari.sch.id/__statics/gudangsoal/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdf
    • https://elearning.ickendari.sch.id/__statics/gudangsoal/files/free-mods-for-minecraft-pe_GM479516143.pdf
    • https://elearning.ickendari.sch.id/__statics/gudangsoal/files/wurst-client-112-2_GM479516143.pdf
    • https://elearning.ickendari.sch.id/__statics/gudangsoal/files/is-minecraft-free-on-computer_GM479516143.pdf
    • https://elearning.ickendari.sch.id/__statics/gudangsoal/files/how-to-get-free-unlimited-robux_GM431946152.pdf
    • https://elearning.ickendari.sch.id/__statics/gudangsoal/files/free-coin-master-spins-and-coins_GM406889139.pdf
    • https://elearning.ickendari.sch.id/__statics/gudangsoal/files/free-coin-master-hack-no-verification_GM406889139.pdf
    • https://elearning.ickendari.sch.id/__statics/gudangsoal/files/coin-master-100-spin-slot_GM406889139.pdf
    • https://elearning.ickendari.sch.id/__statics/gudangsoal/files/minecraft-hacks-for-2b2t_GM479516143.pdf
    • https://elearning.ickendari.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021_GM406889139.pdf
    • https://elearning.ickendari.sch.id/__statics/gudangsoal/files/coin-master-official-fan-page_GM406889139.pdf
    • https://elearning.ickendari.sch.id/__statics/gudangsoal/files/free-robux-hack_GM431946152.pdf
    • https://elearning.ickendari.sch.id/__statics/gudangsoal/files/feb-23-2021-free-coin-master-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055c1.bin
a72dab413015113a7050554a09302ca4247c278bc833dc8b2b2f6548cd1acd9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55C1 25236 bytes
font_01_sfnt_off00008f9a.bin
ebe18ac5ffe7e11012f688448806bc85152fcfc75e510305ecd2598303f27e35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F9A 18760 bytes

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