Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bf5b4118bc44b44…

MALICIOUS

PDF

32.4 KB Created: 2021-06-28 23:33:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c4a0a508006261caf5df0423f55da2a7 SHA-1: 0a2785f1ff6b45548a1a9fd24d772197251840dd SHA-256: 3bf5b4118bc44b442f3707082f6072ee94acba58d573f6273329c5cb82ad3340
102 Risk Score

Malware Insights

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

The PDF document contains numerous links disguised as 'free item lists' for popular games, aiming to trick users into downloading malicious content or visiting phishing sites. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the 'ML_NYX_PDF_MALICIOUS' score further supports its malicious nature. The document body explicitly mentions 'Free Roblox Item List' and 'CLICK HERE TO ACCESS ROBUX GENERATOR', reinforcing the lure.

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/free-roblox-item-list-game-hack PDF link annotation
    • https://opac.itp.ac.id/repository/how-to-use-cheat-engine-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/pokemon-go-free-online-play_GM1094591345.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/hacking-the-game-the-streets-on-roblox_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/daily-free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/hack-download-mega-innovation-roblox_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-health-hack_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/break-free-roblox-id_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/hack-para-dragon-ball-z-rage-roblox_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/real-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/skidma-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-60-spins_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-hack-roblox-to-get-admin-commands_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/hack-money-lumber-tycoon-2-roblox_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-just-click_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_off000029c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29C9 21772 bytes
SHA-256: 46a5f901c986a03eff77bad63a4b31a6ad99280ddb2562078f007087cf9b65b7
font_01_sfnt_off000059a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59A4 19132 bytes
SHA-256: 14d1d94339b893fb26facab23940706f67f9b458d4bee343b88ae9f6515ff4ff

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