Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf757fe50c25dfae…

MALICIOUS

PDF

33.8 KB Created: 2021-06-25 10:35:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 65caad325619341dc6d1c5073629bb6a SHA-1: c949983ebc46bfd7bafcf901039fe1c1c508e5b2 SHA-256: cf757fe50c25dfae315698d9c52e2e29c09cd34441cfe4709462a8ae47b789a9
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 SEO-optimized and related to game hacks and cheats. The ML classifier strongly indicated maliciousness, and the presence of a 'download button' heuristic suggests a lure for users to click these links. The document likely serves as a phishing or scam document to redirect users to potentially malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.co/app/431946152/how-to-hack-money-in-roblox-vehicle-simulator-game-hack
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/robux-free-2021_GM431946152.pdf
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/free-robux-no-verification-at-all_GM431946152.pdf
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/how-do-you-get-free-robux-2021_GM431946152.pdf
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/roblox-cheat-engine-speed-hack-mac_GM431946152.pdf
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/coin-master-pc-hack-tool_GM406889139.pdf
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/no-human-verification_GM431946152.pdf
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/worst-client_GM479516143.pdf
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/coin-master-free-spin-and-coin-links_GM406889139.pdf
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/arsenal-cheats-roblox_GM431946152.pdf
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/coin-master-hack-download_GM406889139.pdf
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/pokemon-go-for-free_GM1094591345.pdf
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/coin-master-hack-no-verification_GM406889139.pdf
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/coin-master-free-spins-daily-2021_GM406889139.pdf
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/is-roblox-free-on-the-nintendo-switch_GM431946152.pdf
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/https-iosgodscom-topic-20214coinmasterhack_GM406889139.pdf
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/free-robux-websites-that-work_GM431946152.pdf
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/free-robux-without-any-verification_GM431946152.pdf
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/2021-coin-master-hack-without-verification_GM406889139.pdf
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/how-to-get-free-robux-on-roblox_GM431946152.pdf
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/coin-master-free-coins-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002cbd.bin
8bb8ec3099be08f4717f21dc858536ed5509e3fe842de60e0dec714d3ccfe22f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CBD 21712 bytes
font_01_sfnt_off00005c91.bin
beae92de6d42a9f8f88e1aafabffe0c28f7136223f36f7da11182f0a7a2daa10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C91 20120 bytes

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