Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fe6a32756f4ebec…

MALICIOUS

PDF

49.4 KB Created: 2021-05-16 13:23:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b805da0227590381c6fd598815ea4345 SHA-1: 01620db472bee4d985bc0421eddc433a9854433d SHA-256: 9fe6a32756f4ebec7afff510e42eb3c1a85104139f0bb56888c432b2877d6067
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are related to popular games and in-game currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting a link farm or a method to drive traffic to potentially malicious sites. The ML classifier also flagged the PDF as malicious. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9228

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 https://netcdn.xyz/app/431946152/how-to-earn-robux-game-hack
    • http://bogatyr.com/images/master-coin-free-spin_GM406889139.pdf
    • http://bogatyr.com/images/free-spins-coin-master-no-verification_GM406889139.pdf
    • http://bogatyr.com/images/free-roblox-groups-with-funds_GM431946152.pdf
    • http://bogatyr.com/images/free-robux-no-verification-no-download-2021_GM431946152.pdf
    • http://bogatyr.com/images/how-to-get-free-clothes-on-roblox_GM431946152.pdf
    • http://bogatyr.com/images/free-spins-in-coin-master-without-human-verification_GM406889139.pdf
    • http://bogatyr.com/images/coin-master-daily-link_GM406889139.pdf
    • http://bogatyr.com/images/coin-master-hack-lost-world-2021-com_GM406889139.pdf
    • http://bogatyr.com/images/how-to-get-free-snacks-on-coin-master_GM406889139.pdf
    • http://bogatyr.com/images/robux-no-human-verification-2021_GM431946152.pdf
    • http://bogatyr.com/images/robux-free-2021_GM431946152.pdf
    • http://bogatyr.com/images/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdf
    • http://bogatyr.com/images/free-robux-hacks-no-verification_GM431946152.pdf
    • http://bogatyr.com/images/how-to-get-free-robux-without-downloading-anything_GM431946152.pdf
    • http://bogatyr.com/images/free-robux-please_GM431946152.pdf
    • http://bogatyr.com/images/roblox-hack-me_GM431946152.pdf
    • http://bogatyr.com/images/minecraft-pe-free-apk_GM479516143.pdf
    • http://bogatyr.com/images/how-to-create-group-in-coin-master-free-spins_GM406889139.pdf
    • http://bogatyr.com/images/free-roblox-generator_GM431946152.pdf
    • http://bogatyr.com/images/coin-master-attack-block-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b73.bin
f29e72509c57676bf4d4302e2f52c61b109d5e1ee74b967ece5bba1efcb9ba8b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B73 30980 bytes
font_01_sfnt_off000094b8.bin
10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94B8 2880 bytes
font_02_sfnt_off00009ea2.bin
e59d0dbfa916da45dc1e57bbb1674eee7460563807a8b8eb6343b67328d59b2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EA2 18244 bytes

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