Malicious PDF — malware analysis report

Static analysis result for SHA-256 de877eaafb505f61…

MALICIOUS

PDF

34.1 KB Created: 2021-06-19 01:13:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 38e344200772b9d5ee4d526ef3c61882 SHA-1: 201b3a875e34a4a1c678a4b9b046aa8b3fb348aa SHA-256: de877eaafb505f612d026a995429dd2fe932390a61116b3ec9632b17ac3e1964
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links to external websites, many of which are related to game hacks and cheats, suggesting a lure for users to download potentially malicious software. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button heuristic further supports this assessment. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/roblox-free-2021-robux-game-hack PDF link annotation
    • https://www.mescosa.com/uploaded_files/userfiles/files/how-to-hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/robux-free-co_GM431946152.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/hack-coin-master-game-apk-download_GM406889139.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/how-to-get-coin-master-free-spins-in-email_GM406889139.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/coin-master-hack-tool-pc-download_GM406889139.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/cant-open-cheat-engine-with-roblox_GM431946152.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.mescosa.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F46 22032 bytes
SHA-256: 3d0925334b122de388790e27b85ad053610e997ead65602e0c6edb6665a5733b
font_01_sfnt_off00005fda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDA 19192 bytes
SHA-256: a5a96290e4c76d04414f02fc4567f19337564a66b1ac17ab11373809f6351328

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