Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5425ac2442826e3…

MALICIOUS

PDF

43.0 KB Created: 2021-05-12 09:31:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 35f5f7bf1787e37fcc4d755230e4f9f2 SHA-1: a3276aed48d42d9ed61692f4f9b40923236ba17e SHA-256: b5425ac2442826e3267f95381e4b572b5007e1e406cd7a998fe7be8e0c53f3be
140 Risk Score

Malware Insights

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

This PDF document contains a link to a known malicious redirector, https://netcdn.xyz/app/479516143/wurst-1.12-2-game-hack, which is likely used to distribute malware. The document also contains lures suggesting the user copy/paste content into a shell, indicating an attempt to trick the user into executing a downloaded payload. The ML classifier also flagged this document with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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
  • 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/479516143/wurst-1.12-2-game-hack In PDF document text
    • https://corbo.ru/images/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://corbo.ru/images/coin-master-jackpot-hack_GM406889139.pdfIn PDF document text
    • https://corbo.ru/images/game-toolbox_GM479516143.pdfIn PDF document text
    • https://corbo.ru/images/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://corbo.ru/images/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://corbo.ru/images/free-robux-download_GM431946152.pdfIn PDF document text
    • https://corbo.ru/images/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://corbo.ru/images/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://corbo.ru/images/free-robux-wheel_GM431946152.pdfIn PDF document text
    • https://corbo.ru/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://corbo.ru/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://corbo.ru/images/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • https://corbo.ru/images/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://corbo.ru/images/free-robux-site_GM431946152.pdfIn PDF document text
    • https://corbo.ru/images/get-free-robux-info_GM431946152.pdfIn PDF document text
    • https://corbo.ru/images/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • https://corbo.ru/images/fast-robux-online_GM431946152.pdfIn PDF document text
    • https://corbo.ru/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://corbo.ru/images/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • https://corbo.ru/images/how-to-hack-in-arsenal_GM431946152.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
stream_003_off00004d49.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D49 25144 bytes
SHA-256: 78adf232c25eee4eb4e48fafa0de19e1d3b02c949799ab8166b955a8059db491
font_01_sfnt_off00008702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8702 17856 bytes
SHA-256: 231ed0e7957a5c445c778f0fe1c9318810f2b5562dc1cd2ae15ff2a5633334db

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