Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0b78213b77a4627…

MALICIOUS

PDF

34.9 KB Created: 2021-06-28 22:58:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 98ca89b4f04c36bb2e99b07d3ac05e01 SHA-1: f072b2c0088bd3aa7da3b245735cc2db5f3db455 SHA-256: c0b78213b77a4627afc49efce939235911758c5213b5f886387858258b56f492
122 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which point to other PDFs related to game hacking and free in-game currency, suggesting a lure for users seeking cheats or exploits. The ML classifier strongly flagged this PDF as malicious, and the presence of a "download button" heuristic further supports the intent to trick users into downloading content. The document's content and structure indicate a phishing or scam attempt disguised as a helpful resource.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/roblox-hackr-hack-game-hack
    • http://pustaka-smpn3tpi.com//repository/rbxoffers-earn-free-robux_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-robux-in-roblox-using-a-phone_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/how-to-be-a-hacker-in-roblox-on-ipad_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/free-coin-master-hacks-no-verification_GM406889139.pdf
    • http://pustaka-smpn3tpi.com/repository/minecraft-server-hacks_GM479516143.pdf
    • http://pustaka-smpn3tpi.com/repository/free-roblox-bear-mask_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-org_GM406889139.pdf
    • http://pustaka-smpn3tpi.com//repository/body-roblox_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/roblox-hack-check-cashed-v3_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/free-robux-generator-online-no-survey_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-tool-v1-9-pc_GM406889139.pdf
    • http://pustaka-smpn3tpi.com//repository/www-robux-com_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdf
    • http://pustaka-smpn3tpi.com/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/how-to-hack-a-old-roblox-account_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/free-roblox-promo-codes-july-2021_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/are-there-any-actual-robux-cheats-reddit_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/free-robux-on-roblox-without-human-verification_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/a-roblox-profile-have-russia-profile-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031ec.bin
ad18b2e3245d6845eeafc9393a7be60200a701572c9dec00503010bee6cd5bdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31EC 22676 bytes
font_01_sfnt_off00006488.bin
089b68c6567bfd689f4fad21524cb2f9e4af4487108cd6e550a9b094288a401f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6488 18656 bytes

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