Malicious PDF — malware analysis report

Static analysis result for SHA-256 e997eaad10d7cda4…

MALICIOUS

PDF

48.6 KB Created: 2021-06-08 16:54:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ef29176fce885bcaef61a963560dc64a SHA-1: c8d7d9b53df50b8aa7c03d680745647bc8df2107 SHA-256: e997eaad10d7cda40b2833fefaf5878a615ebfb906c4498beaa9c9f4225d293e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to websites offering game hacks and free items. This suggests a link farm or phishing attempt designed to lure users to malicious sites. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the presence of numerous external links indicates a potential for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/www-hack-clients-roblox.de-game-hack
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-hack-iphone_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-accounts_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-do-i-get-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-robux-in-2021_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-coin-master-without-root_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-unlimited-free-spins-link-2021_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-cards-link_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/500-free-coin-master-spins_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-hack-online-link_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-coin-master-coins_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-spins-coin-master_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-buy-pubg-uc-in-india_GM1330123889.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-3rd-village-free-2021-gift-card_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/i-want-free-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spin-and-coin_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-links-free-spins_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/minecraft-tools_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005128.bin
22c393e0361342f1796292574e8474010c78c848244b5ae947d76c1dd783ac3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5128 27276 bytes
font_01_sfnt_off00008f4b.bin
94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F4B 2824 bytes
font_02_sfnt_off000098fa.bin
adcafd75a0a3d632bcf25023f5f9c6f07e8266bd023f6292f6f74c77936a8b8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98FA 19008 bytes

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