Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f5e11a34120d973…

MALICIOUS

PDF

43.2 KB Created: 2021-05-16 07:19:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 63e4167e9557e8e3eb4ae0a38d18184c SHA-1: 9a65b2b783fba2a370b7b1744b10b12924488d9c SHA-256: 1f5e11a34120d97328170f45cd533a454cbcad2b99ba86b54acb865c6e29a8f9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links that form a link farm, all pointing to websites offering 'free Robux' or 'Coin Master hacks'. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a visual download button lure indicate a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially malicious content or facilitate further downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-world-free-robux-game-hack
    • http://www.sabbiadoro.net/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdf
    • http://www.sabbiadoro.net/images/how-to-free-robux_GM431946152.pdf
    • http://www.sabbiadoro.net/images/today-coin-master-spin-free_GM406889139.pdf
    • http://www.sabbiadoro.net/images/coin-master-hack-unlimited-spins_GM406889139.pdf
    • http://www.sabbiadoro.net/images/free-robux-with-no-human-verification_GM431946152.pdf
    • http://www.sabbiadoro.net/images/roblox-hack-app_GM431946152.pdf
    • http://www.sabbiadoro.net/images/robux-generator-no-survey_GM431946152.pdf
    • http://www.sabbiadoro.net/images/oprewards-com-earn_GM431946152.pdf
    • http://www.sabbiadoro.net/images/how-to-hack-coin-master-root_GM406889139.pdf
    • http://www.sabbiadoro.net/images/free-robux-hack_GM431946152.pdf
    • http://www.sabbiadoro.net/images/hack-coin-master-using-cheat-engine_GM406889139.pdf
    • http://www.sabbiadoro.net/images/free-spins-in-coin-master-2021_GM406889139.pdf
    • http://www.sabbiadoro.net/images/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • http://www.sabbiadoro.net/images/free-spins-coin-master-links_GM406889139.pdf
    • http://www.sabbiadoro.net/images/how-do-you-get-free-coins-in-coin-master_GM406889139.pdf
    • http://www.sabbiadoro.net/images/coin-master-hack-tool-without-verification_GM406889139.pdf
    • http://www.sabbiadoro.net/images/get-free-spins-coin-master-2021_GM406889139.pdf
    • http://www.sabbiadoro.net/images/minecraft-hacks-115-2_GM479516143.pdf
    • http://www.sabbiadoro.net/images/minecraft-windows-10-free-with-java_GM479516143.pdf
    • http://www.sabbiadoro.net/images/coin-master-gold-cards-free_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004794.bin
84e6ef95e2c513e03436a9785385ead22bc853e716b70789782fcc8981157a21
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4794 27204 bytes
font_01_sfnt_off0000860a.bin
aacba205b02649cb17ca6db96e04e864edcc8b3535ee86ede1af231380f35ab7
pdf-font-stream PDF embedded font (sfnt) at offset 0x860A 18460 bytes