Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b4e5954a9abbd21…

MALICIOUS

PDF

43.3 KB Created: 2021-05-13 14:28:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b7023b8fb2a7cb5fc593da22048c6ff0 SHA-1: 542d67eca858161f01989cf688f7a0237a603607 SHA-256: 9b4e5954a9abbd219bd93f556405e1e1889b852f3e09dc26b817e134a187e32f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document exhibits characteristics of a malicious lure, primarily through its extensive use of external links to various PDF files, many of which appear to be SEO-optimized for game-related cheats and hacks. The presence of a direct download URL and a heuristic indicating a 'download button' further supports the intent to trick users into downloading potentially harmful content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/479516143/minecraft-free-install-game-hack
    • http://seniornetwanganui.org.nz/images/codes-how-to-get-free-robux_GM431946152.pdf
    • http://seniornetwanganui.org.nz/images/coin-master-cracked-apk-free-download_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/www-roblox-com-free-robux_GM431946152.pdf
    • http://seniornetwanganui.org.nz/images/cmaster-club-coin-master-hack_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/free-hacks-for-coin-master_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/minecraft-for-ps3-free_GM479516143.pdf
    • http://seniornetwanganui.org.nz/images/coin-master-free-coins-link-2021-deutsch_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/coin-master-free-link-today_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/www-free-robux-com_GM431946152.pdf
    • http://seniornetwanganui.org.nz/images/coin-master-hacks-no-surveys_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/roblox-hacks-2021_GM431946152.pdf
    • http://seniornetwanganui.org.nz/images/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdf
    • http://seniornetwanganui.org.nz/images/coin-master-get-free-cards_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/juego-hackeado-de-coin-master_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/free-robux-without-survey_GM431946152.pdf
    • http://seniornetwanganui.org.nz/images/free-robux-websites-that-actually-work_GM431946152.pdf
    • http://seniornetwanganui.org.nz/images/free-robux-no-verification-no-survey_GM431946152.pdf
    • http://seniornetwanganui.org.nz/images/robux-app_GM431946152.pdf
    • http://seniornetwanganui.org.nz/images/free-robux-group-payouts_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004aeb.bin
d462f70254a0ea4ca89cd946de8f365fbb468d7669c96b8c1f79ef706246ed09
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AEB 29652 bytes
font_01_sfnt_off0000894e.bin
633b33bb140344f1759210963491f1aee0e41bd13e53d96deaa22883d252c2f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x894E 17644 bytes