Malicious PDF — malware analysis report

Static analysis result for SHA-256 a16d471b86c79c49…

MALICIOUS

PDF

34.9 KB Created: 2021-06-28 14:19:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 473c2d5fdcb37bdb902ccc9b9c9a9341 SHA-1: 07aa3472153e6c95f255b1fa31e98320a479932c SHA-256: a16d471b86c79c49b0ca5dfe5a48f071d1f324c868f71d4d568283b3c89d5e5e
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are part of a link farm designed to attract users searching for game cheats and hacks. The document body and heuristics indicate a lure for free game items, specifically mentioning Roblox and Coin Master. The presence of a large number of external links, including a link farm heuristic, strongly suggests a malicious intent to redirect users to potentially harmful sites.

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.co/app/431946152/25-roblox-for-free-game-hack
    • http://empresa-venta.hr/files/haktuts-coin-master-free-spin-today_GM406889139.pdf
    • http://empresa-venta.hr/files/coin-master-online-hack-tool_GM406889139.pdf
    • http://empresa-venta.hr/files/youtube-how-to-get-free-robux_GM431946152.pdf
    • http://empresa-venta.hr/files/free-robux-no-verification-required_GM431946152.pdf
    • http://empresa-venta.hr/files/roblox-tp-to-me-hack_GM431946152.pdf
    • http://empresa-venta.hr/files/how-to-get-free-robux-on-roblox_GM431946152.pdf
    • http://empresa-venta.hr/files/free-knife-codes-for-assassin-roblox_GM431946152.pdf
    • http://empresa-venta.hr/files/how-to-get-free-thumbynail-in-roblox-studio_GM431946152.pdf
    • http://empresa-venta.hr/files/minecraft-free-trial_GM479516143.pdf
    • http://empresa-venta.hr/files/free-robux-for-free_GM431946152.pdf
    • http://empresa-venta.hr/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdf
    • http://empresa-venta.hr/files/hacks-para-coin-master_GM406889139.pdf
    • http://empresa-venta.hr/files/is-roblox-studio-free_GM431946152.pdf
    • http://empresa-venta.hr/files/free-spins-on-coin-master-2021_GM406889139.pdf
    • http://empresa-venta.hr/files/windows-10-minecraft-hacks_GM479516143.pdf
    • http://empresa-venta.hr/files/op-rewards-free-robux_GM431946152.pdf
    • http://empresa-venta.hr/files/coin-master-free-spin-and-coins-links_GM406889139.pdf
    • http://empresa-venta.hr/files/free-tiktok-likes-no-survey_GM835599320.pdf
    • http://empresa-venta.hr/files/coin-master-free-online_GM406889139.pdf
    • http://empresa-venta.hr/files/minecraft-gun-games-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003116.bin
77f72eff6434674c03a2ecb765dc4c953bf79686197c181ac4d2c899bdc9c432
pdf-font-stream PDF embedded font (sfnt) at offset 0x3116 22700 bytes
font_01_sfnt_off000063d7.bin
e009a299434b22de668c71ac2f57d4a537242973521ef295985ec03f81d86423
pdf-font-stream PDF embedded font (sfnt) at offset 0x63D7 18908 bytes