Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fbd22ede6df2932…

MALICIOUS

PDF

34.1 KB Created: 2021-07-08 19:54:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1498766066db18b93a8ed57b46f3ce78 SHA-1: d0273bbb6060d099babcfce24c19a715b2d04399 SHA-256: 2fbd22ede6df293284e6e12100111c1f167beaf3bbb985d2fe422a9e1a72d570
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a document body that promotes free game currency and accounts, indicative of a phishing or scam lure. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm suggests an attempt to generate traffic or distribute malicious content. The document's primary function appears to be directing users to external sites via these links.

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.tw/app/431946152/roblox-accounts-for-sale-free-game-hack PDF link annotation
    • https://e-learning.mtsnbarsel.sch.id/__statics/gudangsoal/files/coin-mster-free_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsnbarsel.sch.id/__statics/gudangsoal/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnbarsel.sch.id/__statics/gudangsoal/files/spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsnbarsel.sch.id/__statics/gudangsoal/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnbarsel.sch.id/__statics/gudangsoal/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnbarsel.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnbarsel.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnbarsel.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnbarsel.sch.id/__statics/gudangsoal/files/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsnbarsel.sch.id/__statics/gudangsoal/files/10-tips-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnbarsel.sch.id/__statics/gudangsoal/files/pokemon-go-free-8-bit_GM1094591345.pdfIn PDF document text
    • https://e-learning.mtsnbarsel.sch.id/__statics/gudangsoal/files/moonactive-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsnbarsel.sch.id/__statics/gudangsoal/files/roblox-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnbarsel.sch.id/__statics/gudangsoal/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsnbarsel.sch.id/__statics/gudangsoal/files/how-to-get-free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnbarsel.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnbarsel.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-games-with-cheat-engine_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnbarsel.sch.id/__statics/gudangsoal/files/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsnbarsel.sch.id/__statics/gudangsoal/files/counter-blox-roblox-offensive-hacks-tutorial_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsnbarsel.sch.id/__statics/gudangsoal/files/give-me-some-free-robux_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_off000031e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31E2 21368 bytes
SHA-256: 44b375147cb9d5f1d2d1e6a2fedb70e27185f14287d0d6158aeafb6bcb9aec68
font_01_sfnt_off000060a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A6 18896 bytes
SHA-256: 419cb3cdc3e7cbb6ba4548049bcaf8f3e92c4ae134572e03770077cf2843ed8e

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