Malicious PDF — malware analysis report

Static analysis result for SHA-256 260b63ffec677d51…

MALICIOUS

PDF

43.9 KB Created: 2021-05-15 22:32:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b5d7806651da5c57750449bbe019f2ec SHA-1: 7beed9d075a6dd8f2504ca9e15d895cf64de3986 SHA-256: 260b63ffec677d51d9850af2d788bbfcf0886d5681b54421c491ba19a1c54fe8
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a deceptive lure for 'Free Robux' and includes numerous external links, many of which are SEO-formatted PDF URLs. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially malicious content or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/431946152/free-robux-no-verify-2021-game-hack
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master_GM406889139.pdf
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master_GM406889139.pdf
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/give-me-robux-now_GM431946152.pdf
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/how-to-get-free-cards-sets-for-coin-master_GM406889139.pdf
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/instant-free-spins-coin-master_GM406889139.pdf
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdf
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-as-a-kid_GM431946152.pdf
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/how-to-download-minecraft-hacks_GM479516143.pdf
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/google-how-do-you-get-free-robux_GM431946152.pdf
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/free-robux-hack-2021_GM431946152.pdf
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-for-kids_GM431946152.pdf
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/how-to-win-free-robux_GM431946152.pdf
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/free-coins-2021-coin-master-link_GM406889139.pdf
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/coin-master-hack-online-2021_GM406889139.pdf
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/microsoft-free-robux_GM431946152.pdf
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/coin-master-mod-apk-hack_GM406889139.pdf
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-daily-2021_GM406889139.pdf
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/roblox-free-robux-hack_GM431946152.pdf
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/minecraft-114-download_GM479516143.pdf
    • https://elearning.mtsn8jombang.sch.id/__statics/gudangsoal/files/free-robux-exe_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a2e.bin
b9b49d15a8750a8c34bf3dc40b1fd686b253e9a81561ca98f5fd9a17fdc2fd97		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A2E 26740 bytes
font_01_sfnt_off000087ab.bin
9f147bd5bf62c652754f553854fad05fac0b8df637ce3021f80b740c61e7be7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87AB 18848 bytes

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