Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b3ad65ca27922e1…

MALICIOUS

PDF

34.8 KB Created: 2021-06-19 04:08:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6f60e0348bfd3436091c84732bcc308a SHA-1: f9dcb53c918fd5c4fa78fde1f8870e4dc6f8283a SHA-256: 0b3ad65ca27922e16b868ffd46d40764bd9d29c4caaa5a19fb13d770b5483e38
102 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a malicious lure, employing a link farm strategy to direct users to potentially harmful content related to game cheats and free virtual currency. The presence of numerous external URLs, including one pointing to 'free-robux-script-game-hack', and the ML classifier's high confidence score indicate a malicious intent. The document's structure and embedded links suggest it is designed to exploit user interest in obtaining in-game advantages, likely leading to malware downloads or phishing attempts.

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/free-robux-script-game-hack PDF link annotation
    • http://library.patria-artha.ac.id/repository/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-robux-without-any-human-verification_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-roebucks-com_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-pokemon-go-cheats_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/como-hackear-roblox-apk-mediafire_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-phantom-forces-free-robux-bot_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/como-hackear-robux-facil_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-spin-generator-for-coin-master_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_off00003044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3044 22476 bytes
SHA-256: bbc5062e145af0792e4376dd66dcd7fede070c67386efc9429b8683037f1a777
font_01_sfnt_off000062a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A6 19116 bytes
SHA-256: b7ec675b0859f84f9d3687bec040beecaec8d80b831038dc5af6dc69bcb309d5

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