Malicious PDF — malware analysis report

Static analysis result for SHA-256 da8c2e17ee8953fb…

MALICIOUS

PDF

35.6 KB Created: 2021-07-04 05:20:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c55a9f14615092d1f99eee8fad8939ad SHA-1: c93d29a387dd4d71f76a6a0976335fa63667b04d SHA-256: da8c2e17ee8953fb54610bb69181d144729818f151d843b044c292dc0e5db45b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded URLs, identified as a link farm, which is a common tactic for SEO spam and potentially distributing malware. The ML classifier strongly indicated maliciousness, and the presence of external URIs suggests a lure to external content. While no scripts were explicitly extracted, the PDF structure itself facilitates the embedding of links and potentially JavaScript, which could be used to redirect users or initiate downloads.

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/coin-master-daily-free-spins-link-game-hack
    • http://shoruq.sch.ae/userfiles/files/coin-master-daily-free-spins-link-today-haktuts_GM406889139.pdf
    • http://shoruq.sch.ae/userfiles/files/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdf
    • http://shoruq.sch.ae/userfiles/files/free-whatsapp-tik-tok-status-download_GM835599320.pdf
    • http://shoruq.sch.ae/userfiles/files/free-online-generator-for-coin-master_GM406889139.pdf
    • http://shoruq.sch.ae/userfiles/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdf
    • http://shoruq.sch.ae/userfiles/files/robuxmatchcom-free-robux_GM431946152.pdf
    • http://shoruq.sch.ae/userfiles/files/code-for-robux-free-2021-4th-of-july_GM431946152.pdf
    • http://shoruq.sch.ae/userfiles/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdf
    • http://shoruq.sch.ae/userfiles/files/minecraft-bedrock-hacks_GM479516143.pdf
    • http://shoruq.sch.ae/userfiles/files/hack-xp-net-generators-coin-master_GM406889139.pdf
    • http://shoruq.sch.ae/userfiles/files/free-robux-robux-zone-wordpress_GM431946152.pdf
    • http://shoruq.sch.ae/userfiles/files/coin-master-spin-hack_GM406889139.pdf
    • http://shoruq.sch.ae/userfiles/files/free-robux-sites-that-work_GM431946152.pdf
    • http://shoruq.sch.ae/userfiles/files/spin-coin-master_GM406889139.pdf
    • http://shoruq.sch.ae/userfiles/files/free-robux-no-human-verification-no-survey_GM431946152.pdf
    • http://shoruq.sch.ae/userfiles/files/how-to-get-5-million-robux-for-free_GM431946152.pdf
    • http://shoruq.sch.ae/userfiles/files/roblox-army-free-robux_GM431946152.pdf
    • http://shoruq.sch.ae/userfiles/files/coin-master-hack-trick-2021_GM406889139.pdf
    • http://shoruq.sch.ae/userfiles/files/free-robux-no-email_GM431946152.pdf
    • http://shoruq.sch.ae/userfiles/files/free-logo-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003343.bin
3be9871d2d0f8c7d670442f2d92e555a9900e87ef9eb9a6f1c6fa6847fdec034
pdf-font-stream PDF embedded font (sfnt) at offset 0x3343 23060 bytes
font_01_sfnt_off00006735.bin
989ac8744b1238afa99b88b7bb3fb2df9d299a986309a52cf516f5921eb03fc0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6735 18768 bytes