Malicious PDF — malware analysis report

Static analysis result for SHA-256 a96ecb588c47e008…

MALICIOUS

PDF

35.2 KB Created: 2021-06-25 00:25:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2190f146e5416a0748d7c998feb89ce7 SHA-1: cd86665fba8c030e94d3e2a777d6843be4247d2f SHA-256: a96ecb588c47e008387a3133d1ed02b508dc8f517477193019df2fcabf14cf08
102 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF gateways. The primary URL, http://netcdn.co/app/431946152/how-to-get-free-stuff-roblox-2021-game-hack, suggests a lure for game-related cheats or hacks. The presence of a ML classifier flagging this PDF as malicious and the high number of external links indicate a high likelihood of this document being used to distribute malware or lead users to phishing sites.

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/how-to-get-free-stuff-roblox-2021-game-hack PDF link annotation
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/free-military-costume-roblox_GM431946152.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/free-robux-means_GM431946152.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/free-robux-promo-codes-list-2021_GM431946152.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/hack-on-ulitimate-driving-roblox_GM431946152.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/roblox-unlimited-robux-hack-apk_GM431946152.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/2021-roblox-hacks-february-2021_GM431946152.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/hacks-how-to-get-free-galaxy-coins-roblox_GM431946152.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/free-swat-roblox-jailbreak-pastebin_GM431946152.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/get-free-roblox-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/youtube-roblox-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/free-robux-only-enter-username_GM431946152.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/roblox-cbro-free-money-hack_GM431946152.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/roblox-money-cheats-xbox-one_GM431946152.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/roblox-jailbreak-hackfree-unlimited-money-cheats_GM431946152.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/huskey-how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/roblox-meep-city-cheats_GM431946152.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/roblox-blox-burg-money-hack_GM431946152.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/como-conseguir-diamonds-en-royale-high-roblox-hack_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_off00003136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3136 22408 bytes
SHA-256: 8b29aa3d37779740b6ab5b89dfb008135545bf0c17364f8ec1296f4400bd0f80
font_01_sfnt_off0000630a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x630A 19460 bytes
SHA-256: 8768a9c4b3141a9c44b22f11f16aa4bbad12b2f6412dfe83f574a7ffa5e32049