Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcbe24f472a39f9e…

MALICIOUS

PDF

46.1 KB Created: 2021-05-17 15:51:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: dd6acfb9b23670c01912314902879009 SHA-1: 5e2bf9e267216b83458ce63f6774a0c8a048699c SHA-256: fcbe24f472a39f9eec492bbdb726a0d6efb3ef4aa2c1ee5d8f7fe54295a84577
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links pointing to external websites, many of which are designed to appear as "free Robux" or "free Coin Master spins" lures. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting an attempt to direct users to potentially malicious content or downloads. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/blox.page-free-robux-game-hack
    • http://joshherman.com/images/113-hacked-client_GM479516143.pdf
    • http://joshherman.com/images/real-coin-master-hacks_GM406889139.pdf
    • http://joshherman.com/images/get-free-gold-cards-in-coin-master_GM406889139.pdf
    • http://joshherman.com/images/hack-coin-master-online-without-human-verification_GM406889139.pdf
    • http://joshherman.com/images/coin-master-free-spins-hack-iphone_GM406889139.pdf
    • http://joshherman.com/images/how-to-hack-coin-master-apkmody_GM406889139.pdf
    • http://joshherman.com/images/minecraft-for-free-on-phone_GM479516143.pdf
    • http://joshherman.com/images/free-spins-coin-master-daily_GM406889139.pdf
    • http://joshherman.com/images/give-me-free-robux_GM431946152.pdf
    • http://joshherman.com/images/coin-master-free-spins-link-download_GM406889139.pdf
    • http://joshherman.com/images/all-minecraft-handbooks_GM479516143.pdf
    • http://joshherman.com/images/hack-coin-master-for-free_GM406889139.pdf
    • http://joshherman.com/images/25-free-spins-coin-master_GM406889139.pdf
    • http://joshherman.com/images/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • http://joshherman.com/images/get-free-robux-com_GM431946152.pdf
    • http://joshherman.com/images/free-spin-link-for-coin-master-game_GM406889139.pdf
    • http://joshherman.com/images/free-robux-earn_GM431946152.pdf
    • http://joshherman.com/images/minecraft-apk-114-4_GM479516143.pdf
    • http://joshherman.com/images/lazy-blocks-com-free-robux_GM431946152.pdf
    • http://joshherman.com/images/coin-master-free-coins-and-spins-link-today_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a62.bin
11486432dfef6ee4616f7319aa4c444f86c0a01ecfb2f457b9cced136c6db1b4
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A62 25700 bytes
font_01_sfnt_off00008602.bin
10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
pdf-font-stream PDF embedded font (sfnt) at offset 0x8602 2880 bytes
font_02_sfnt_off00008fec.bin
477bf2ef93abdd264292ffad6df1a1b97b65e35661cdcc3b49278aa82d19b07c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FEC 18848 bytes