Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b41c40f8d09c9f…

MALICIOUS

PDF

42.1 KB Created: 2021-05-17 21:35:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f956267b3636a9750696e81938aaf5f9 SHA-1: 55e8d17aac9352712b344f0f9ebd1aa40153eff6 SHA-256: e0b41c40f8d09c9f5ac514b6d17369f2a9773d3ab622a406a3b0de4e7ace49e1
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various websites related to game hacks and free in-game currency. The ML_NYX_PDF_MALICIOUS heuristic also flagged this PDF with high confidence. The presence of these links suggests an attempt to redirect users to potentially malicious sites, likely for distributing malware or engaging in phishing or scam activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/free-spins-coin-master-2021-hack-game-hack
    • http://ggmtc.net/userfiles/files/get-robux-for-free-2021_GM431946152.pdf
    • http://ggmtc.net/userfiles/files/roblox-help-free-robux_GM431946152.pdf
    • http://ggmtc.net/userfiles/files/free-spins-and-coins-for-coin-master_GM406889139.pdf
    • http://ggmtc.net/userfiles/files/coin-master-server-hack_GM406889139.pdf
    • http://ggmtc.net/userfiles/files/fb-coin-master-free-spins-link_GM406889139.pdf
    • http://ggmtc.net/userfiles/files/free-robux-websites-that-work_GM431946152.pdf
    • http://ggmtc.net/userfiles/files/coin-master-free-coins-spins_GM406889139.pdf
    • http://ggmtc.net/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://ggmtc.net/userfiles/files/coin-master-daily-free-spin-app_GM406889139.pdf
    • http://ggmtc.net/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdf
    • http://ggmtc.net/userfiles/files/coin-master-online-hack-no-survey-no-password_GM406889139.pdf
    • http://ggmtc.net/userfiles/files/coin-master-free-spin-reward-links_GM406889139.pdf
    • http://ggmtc.net/userfiles/files/roblox-robux-hack-generator_GM431946152.pdf
    • http://ggmtc.net/userfiles/files/coin-master-free-spin-link-app_GM406889139.pdf
    • http://ggmtc.net/userfiles/files/haktuts-coin-master-free-spin-link_GM406889139.pdf
    • http://ggmtc.net/userfiles/files/coin-master-hack-version-download-2021-android_GM406889139.pdf
    • http://ggmtc.net/userfiles/files/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • http://ggmtc.net/userfiles/files/roblox-free-hair-boy_GM431946152.pdf
    • http://ggmtc.net/userfiles/files/free-robux-without-downloading-anything_GM431946152.pdf
    • http://ggmtc.net/userfiles/files/coin-master-hack-no-human-verification-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049d3.bin
55852401710e0d3141b0d3c2f0c246430e3546165018594e9d8c6b7862016e6a
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49D3 24352 bytes
font_01_sfnt_off00008175.bin
a5560883dc18b22b6e1d4164516743640258d4849b8ee5f58e623da8a68570df
pdf-font-stream PDF embedded font (sfnt) at offset 0x8175 18456 bytes