Malicious PDF — malware analysis report

Static analysis result for SHA-256 826c60cac69a291c…

MALICIOUS

PDF

42.9 KB Created: 2021-05-19 13:08:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 88fd888204ff32a5564a00cfb89e867d SHA-1: e0e4f0a261f69700dbcc03f9f05b2318c57d3248 SHA-256: 826c60cac69a291c3d533ff7fa85f9f911876d9a44bba63d353513e0c8408e7f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are disguised as guides or hacks for popular games. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and the 'ML_NYX_PDF_MALICIOUS' score is very high. The presence of embedded URLs and the document's structure suggest it is designed to redirect users to potentially malicious content, likely as part of a phishing or malware distribution campaign. No scripts were extracted, but the link farm itself is a strong indicator of malicious intent.

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/835599320/tiktok-free-10-likes-game-hack
    • http://vagency.us/images/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • http://vagency.us/images/how-to-hack-roblox-for-robux_GM431946152.pdf
    • http://vagency.us/images/how-to-get-minecraft-java-free_GM479516143.pdf
    • http://vagency.us/images/coin-master-free-coins-and-spins-today_GM406889139.pdf
    • http://vagency.us/images/minecraft-free-download-no-virus_GM479516143.pdf
    • http://vagency.us/images/easy-way-to-get-robux_GM431946152.pdf
    • http://vagency.us/images/flip-master-coins-hack_GM406889139.pdf
    • http://vagency.us/images/how-to-get-minecraft-coins-for-free_GM479516143.pdf
    • http://vagency.us/images/free-robux-promo-codes_GM431946152.pdf
    • http://vagency.us/images/free-robux-no-verification-at-all_GM431946152.pdf
    • http://vagency.us/images/how-you-get-free-robux_GM431946152.pdf
    • http://vagency.us/images/huskybuckscom-free-robux_GM431946152.pdf
    • http://vagency.us/images/hack-coin-master-2021-pc_GM406889139.pdf
    • http://vagency.us/images/free-robux-games-that-actually-work_GM431946152.pdf
    • http://vagency.us/images/how-to-get-minecraft-for-free-ios_GM479516143.pdf
    • http://vagency.us/images/how-to-get-free-robux-on-chromebook_GM431946152.pdf
    • http://vagency.us/images/give-me-free-robux_GM431946152.pdf
    • http://vagency.us/images/how-to-hack-coin-master-game-without-root_GM406889139.pdf
    • http://vagency.us/images/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://vagency.us/images/free-spins-for-coin-master-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004983.bin
75369d5c83d053a2a0f1c5fc33ef30ada50d8dee3f02058f22716e3d246d795a
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4983 26588 bytes
font_01_sfnt_off00008728.bin
d3f724264e3985dc1dde7b9a63dbbf6387556dcda54e02681c1036ae3c3e2548
pdf-font-stream PDF embedded font (sfnt) at offset 0x8728 17732 bytes