Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8c65da19c958905…

MALICIOUS

PDF

34.8 KB Created: 2021-07-06 09:27:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 76ea5604dff4c7100cc618e11b0a9a57 SHA-1: d52738c4ed2973e4bcb926885bfcc4a13f7ac093 SHA-256: c8c65da19c95890515d4178d62f30295a7b7b54451e2bfeffe4d49361d192e30
102 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that link to websites offering game hacks and cheats, suggesting a lure for users to download malicious files. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm heuristic further supports the malicious intent. No scripts were extracted, but the document's structure and embedded links indicate a phishing or malware distribution attempt.

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/431946152/roblox-speed-hack-2021-game-hack
    • http://www.pspmrsmmbk.com/cendana//repository/how-to-get-robux-on-phone_GM431946152.pdf
    • http://www.pspmrsmmbk.com/cendana//repository/coin-master-spins-and-coins_GM406889139.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/free-robux-generators-without-doing-gift-cards_GM431946152.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/como-hackear-una-cuenta-de-roblox_GM431946152.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/easy-robux-today-hack-no-human-verification_GM431946152.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/outwit-roblox-hack_GM431946152.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-hack-com-for-free-robux_GM431946152.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/hacks-para-coin-master_GM406889139.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-hack-into-a-account-on-roblox_GM431946152.pdf
    • http://www.pspmrsmmbk.com/cendana//repository/how-to-get-free-robux-on-mobile_GM431946152.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/usando-hacks-en-roblox-murder-mistery_GM431946152.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/free-roblox-toy-codes_GM431946152.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/free-spins-for-coin-master_GM406889139.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/www-rbxhut-com_GM431946152.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/free-minecraft-com_GM479516143.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/hacks-for-roblox-apps_GM431946152.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-obc-hack-2021_GM431946152.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/free-robux-for-lg-phone_GM431946152.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/coinmaster-rewards_GM406889139.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-get-free-robux-on-pc_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030be.bin
d2833aaa6b5c376ba621ca87f883e007b4662b77ca778d94ab2a73772cbb02de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30BE 22408 bytes
font_01_sfnt_off00006249.bin
9d8314e81f7c9cb8ac8cea0ccdd7c973a2d3473ab1fb2aa7c5b4aacabbab7eaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6249 19224 bytes

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