Malicious PDF — malware analysis report

Static analysis result for SHA-256 754c19f85ba80131…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 15:38:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 79c86c431f64823cd31e7a315563828e SHA-1: 524d2f33ac685336a90c9230a5343733245775cc SHA-256: 754c19f85ba80131e9d074b74bd6d6f3ce4b328243e55cbc85504d24fcadc3d5
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 point to game-related hacks and cheats, suggesting a lure for users to download potentially malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URIs reinforces this assessment. The document's content and structure indicate a phishing or scam attempt to trick users into visiting these links.

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-game-hack-apk-game-hack
    • http://www.himalassociation.org/himal/ck_image/files/free-roblox-combos_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/roblox-military-simulator-hack-mecha_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/coin-master-free-coins-link-2021_GM406889139.pdf
    • http://www.himalassociation.org/himal/ck_image/files/free-robux-2021-hack_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/free-robux-dont-get-anything-from-survey-varification_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/free-roblox-toy-codes-unused_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/coin-master-daily-free-spins-link-2021_GM406889139.pdf
    • http://www.himalassociation.org/himal/ck_image/files/how-to-get-free-robuxs-by-surveys-roblox_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/how-to-get-free-robux-for-real_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/free-minecraft-skin-maker_GM479516143.pdf
    • http://www.himalassociation.org/himal/ck_image/files/roblox-local-fly-script-hack_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/adfly-roblox-hack_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/free-roblox-accounts-with-robux-2021_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/coin-master-hack-using-lucky-patcher_GM406889139.pdf
    • http://www.himalassociation.org/himal/ck_image/files/paint-net-free-download-for-roblox_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/free-robux-without-survey_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/roblox-hack-free-robux-and-tix-2021_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/how-to-get-free-robux-easy-no-download_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/can-i-get-free-robux_GM431946152.pdf
    • http://www.himalassociation.org/himal/ck_image/files/free-stuff-on-roblox-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003189.bin
13e87c7988781d04cd1771d0d132f39ea772a8709d540af98f9ad039658e897d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3189 22524 bytes
font_01_sfnt_off000063fa.bin
571ab4b458d0dac508f9535f575fba5b7e94d60ff2bdf8022b00b4ca59ab09de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63FA 18440 bytes

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