Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ebf56c4a8611af…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 11:16:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0a1aeb44ecf8055fa9a8f5e5ef349223 SHA-1: ec9f8226e40c1f36cef575e37d98f24ea0502f10 SHA-256: 22ebf56c4a8611afd194cd86c03fbaba67ad80af2f0f8f5d6a6850563164cb31
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm with numerous URLs pointing to game-related hacks and cheats, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_LINK_FARM' strongly suggests this is a malicious attempt to redirect users to external, potentially harmful content. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/431946152/roblox-a-game-hack
    • http://110.232.83.89/slimsppks/repository/coin-master-hack-apk-july-2021_GM406889139.pdf
    • http://110.232.83.89/slimsppks/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdf
    • http://110.232.83.89/slimsppks/repository/coin-master-daily-free-spin-app_GM406889139.pdf
    • http://110.232.83.89/slimsppks/repository/get-free-robux-just-by-joining-this-group_GM431946152.pdf
    • http://110.232.83.89/slimsppks/repository/roblox-hack-for-life-in-psridise_GM431946152.pdf
    • http://110.232.83.89/slimsppks/repository/good-free-minecraft-server-hosting_GM479516143.pdf
    • http://110.232.83.89/slimsppks/repository/free-robux-giveaway-live_GM431946152.pdf
    • http://110.232.83.89/slimsppks/repository/how-to-hack-grand-blox-auto-on-roblox_GM431946152.pdf
    • http://110.232.83.89/slimsppks/repository/free-stuff-on-roblox-2021_GM431946152.pdf
    • http://110.232.83.89/slimsppks/repository/how-to-earn-free-stars-on-coin-master_GM406889139.pdf
    • http://110.232.83.89/slimsppks/repository/can-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://110.232.83.89/slimsppks/repository/roblox-robux_GM431946152.pdf
    • http://110.232.83.89/slimsppks/repository/how-you-get-free-robux_GM431946152.pdf
    • http://110.232.83.89/slimsppks/repository/hack-de-robux-100-real-2021_GM431946152.pdf
    • http://110.232.83.89/slimsppks/repository/free-robux-no-human-verification-no-downloading-apps_GM431946152.pdf
    • http://110.232.83.89/slimsppks/repository/how-to-get-free-robux-without-surveys_GM431946152.pdf
    • http://110.232.83.89/slimsppks/repository/promo-codes-for-free-robux_GM431946152.pdf
    • http://110.232.83.89/slimsppks/repository/rbxcity-free-robux_GM431946152.pdf
    • http://110.232.83.89/slimsppks/repository/btools-hack-roblox-2021-download_GM431946152.pdf
    • http://110.232.83.89/slimsppks/repository/how-to-get-robux-for-free-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
45e7d102993d84e721d098df535b091f5b2d8b1de8182a62a07339760f7caa7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3189 22424 bytes
font_01_sfnt_off000062ee.bin
a95df912d9a51278cddf4d13674ad29103f5defba35cc7118de0a05d6b7c30a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62EE 18484 bytes

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