Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec020e90b39da302…

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 05:55:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b630a53c46a96e9c4348bd94daa60f62 SHA-1: 749778da53a88187b44f8ef170e0eb0dba1146ba SHA-256: ec020e90b39da302de16fde1ed83f81d7cd735ee8b31a74201bdd17223801349
102 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are structured as SEO link farms, all promoting free game currency or hacks. The primary URL, https://netcdn.online/app/431946152/free-robux-app-real-game-hack, suggests the document is a lure to download a malicious application. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/431946152/free-robux-app-real-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/pokemon-go-free-qr-codes-2021_GM1094591345.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/tiktok-free-ebooks_GM835599320.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-minecraft-texture-packs_GM479516143.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
stream_004_off00005025.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5025 26940 bytes
SHA-256: 04308fdd8c849b488e37f8cb3b36e3618589c40172374bbc3a16dc3c770ec18b
font_01_sfnt_off00008cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF6 18492 bytes
SHA-256: 9e447b6d8b47d61e54db9515b6598511f2c2f765926adb3e35dae1cd8ee44e1f

Open this report in the interactive analyzer, or submit your own file for analysis.