Malicious PDF — malware analysis report

Static analysis result for SHA-256 40d1647f108e6769…

MALICIOUS

PDF

35.4 KB Created: 2021-07-01 07:57:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3d8edc3e276d9c38fa9deb149827029c SHA-1: 4d5501a67a560a42bc0f15d85164e3438db2ce7f SHA-256: 40d1647f108e67695afbe88c5fc70100a8161fe1a7ecf025764bf5de44ce643a
102 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are SEO-optimized PDF documents promising game hacks and free currency. The primary URL, http://netcdn.co/app/431946152/get-free-robux-on-roblox-games-game-hack, suggests a direct download lure. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this document is designed to trick users into downloading potentially unwanted or malicious software.

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/get-free-robux-on-roblox-games-game-hack PDF link annotation
    • https://library.itn.ac.id/perpusitn/repository/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-much-pokemon-go-free-account_GM1094591345.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/dominus-roblox-free_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-game-hack-app-download_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/anarchy-hack-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/new-free-items-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/ok-google-free-roblox-games_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-free-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/hacks-de-comandos-de-admin-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-roblox-script-executor-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/bloxburd-free-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-cheat-book_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-redeem-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coinmaster-rewards_GM406889139.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_off000032a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32A6 22572 bytes
SHA-256: 2571ec23917cd19dfd2efe70bcfeebd0af3d178cbb25d7a3a24445d4513181a5
font_01_sfnt_off000064fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64FB 19152 bytes
SHA-256: cd415b7d202b49144abdfcfcf80ace98ae3a667ee5a2bbeacfa393b6c52dd57e

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