Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9d91424d9062626…

MALICIOUS

PDF

33.8 KB Created: 2021-06-17 16:41:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: aabb4c573d71bedd577b960491392b4f SHA-1: dd95360f5e68c1ea59254f9540801f1f47d7b269 SHA-256: b9d91424d906262681e712589fec55a98deaab05875ebef2d4c762d86d48b4da
102 Risk Score

Malware Insights

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

This PDF document acts as a link farm, presenting numerous links to other PDF files that promise free game cheats and in-game currency. The primary URL http://netcdn.co/app/431946152/free-aimbot-cbro-roblox-game-hack is likely the initial lure, leading users to a collection of SEO-optimized PDF links designed to attract downloads. The ML classifier strongly indicated maliciousness, supporting the conclusion that this is a phishing or scam attempt.

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-aimbot-cbro-roblox-game-hack PDF link annotation
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hacktman_GM406889139.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/coin-master-hack-online-pc_GM406889139.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/android-coin-master-3433-apk-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://elearning.mts-al-ikhlas-woimenda.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-2021_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_off00002fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FCD 21672 bytes
SHA-256: 27c8d48e0556f8b51be32825e75e89e6612e41a42aaba0b359d3eb5f635254ad
font_01_sfnt_off00005f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F88 18948 bytes
SHA-256: d1e5ae149b21b261cf22fb7a5dd45a59fadc9132ffb3bac91d81bdcca4252603

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