Malicious PDF — malware analysis report

Static analysis result for SHA-256 b07b166d965f3010…

MALICIOUS

PDF

35.0 KB Created: 2021-06-18 20:38:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ef101e69b155f172e00714044c160cb2 SHA-1: 385764f71b95f59ad070075d5bf95ee3e6758d86 SHA-256: b07b166d965f3010da455accad3a975ee0dbffca72c92cc9f0861d9837d026e2
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are related to game hacks and cheats, suggesting a lure for users to download malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of external links further supports a malicious intent. The document's content and structure indicate it's likely part of a phishing or malware distribution campaign.

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/justnow-free-robux-codes-2021-working-game-hack PDF link annotation
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/roblox-sand-simulator-hack-android-2021_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/how-to-get-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/free-robux-no-human-verfaction_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/roblox-login-play-online-for-free_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/how-to-hack-roblox-accounts-and-get-passwords-2021_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/how-to-use-slayer-leecher-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/2nd-best-hacker-on-roblox_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/free-robux-obby-june-2021_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/nuvos-hack-de-roblox-6-05-2021_GM431946152.pdfIn PDF document text
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/cheats-fro-csgo-in-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3025 21936 bytes
SHA-256: fe53905cde296b56cd2b62cf39bc1e0c494b0e3c3b035784c8dcdaf17ee50002
font_01_sfnt_off0000609c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x609C 20052 bytes
SHA-256: e249762d4c567e822625676c2ad717eb5e5a00453b49057408e535cc633ebe5f

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