Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0dd0318471f8df1…

MALICIOUS

PDF

48.1 KB Created: 2021-06-09 13:16:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 516453b9ae6a14d9a1e8bba4dc9cdf31 SHA-1: 2b9093a707ad903f60fcd150ae33cecfd460fd9c SHA-256: d0dd0318471f8df1de8b42b2ed39c45d9c2ebcc91bb45b9b2584fc620479375c
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with malicious links. It also exhibits characteristics of a link farm, with numerous URLs pointing to potentially harmful content related to game hacks and cheats. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent. No scripts were extracted, but the embedded URLs suggest a download or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.tw/app/431946152/hacker-skin-roblox-game-hack
    • http://maslabaou.com/images/hack-coin-master-1_GM406889139.pdf
    • http://maslabaou.com/images/coin-master-free-spins-haktuts_GM406889139.pdf
    • http://maslabaou.com/images/free-roblox-shirt-templates-2021_GM431946152.pdf
    • http://maslabaou.com/images/how-to-hack-people-in-roblox_GM431946152.pdf
    • http://maslabaou.com/images/how-to-get-hacks-on-roblox_GM431946152.pdf
    • http://maslabaou.com/images/how-to-hack-buildermans-password-on-roblox_GM431946152.pdf
    • http://maslabaou.com/images/oprewards-com-robux_GM431946152.pdf
    • http://maslabaou.com/images/pokemon-go-free-level-40-account_GM1094591345.pdf
    • http://maslabaou.com/images/robuxmatchcom-free-robux_GM431946152.pdf
    • http://maslabaou.com/images/how-to-hack-someones-account-on-roblox_GM431946152.pdf
    • http://maslabaou.com/images/earn-free-robux-on-roblox_GM431946152.pdf
    • http://maslabaou.com/images/master-free-spin_GM406889139.pdf
    • http://maslabaou.com/images/coin-master-gold-cards-free-2021_GM406889139.pdf
    • http://maslabaou.com/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdf
    • http://maslabaou.com/images/coin-master-daily-free-spins-blogspot_GM406889139.pdf
    • http://maslabaou.com/images/free-robux-hacker-us_GM431946152.pdf
    • http://maslabaou.com/images/how-can-u-get-free-robux_GM431946152.pdf
    • http://maslabaou.com/images/best-free-minecraft-texture-packs_GM479516143.pdf
    • http://maslabaou.com/images/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdf
    • http://maslabaou.com/images/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f4c.bin
284df2103114fbb6c4275f249f4927e4f58b52d374cd027ad3f414a813d455b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F4C 26228 bytes
font_01_sfnt_off000088d1.bin
fa93de321190668b294ff46149e4b98ac349b4fd022dcee9ecd964f7f59f3f9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88D1 6768 bytes
font_02_sfnt_off0000990f.bin
b1e9871ec8b7695dd10a74464fee89a47ac5bd75cc5d8a1fa836e11837500c6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x990F 18300 bytes

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