Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee7d1d6ca6a6a37…

MALICIOUS

PDF

30.4 KB Created: 2018-06-11 08:46:45 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7)
MD5: b363bcdd4306570d6de6b6220bbb105c SHA-1: 282786cc6f2b80203d2d664cdaaebacda00a2787 SHA-256: bee7d1d6ca6a6a37c437288703d3e9f3dface5723f2093fdd71e579c2bb02ca4
102 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a fake download lure, specifically using SEO poisoning to trick users into downloading a file. The embedded URLs point to suspicious domains that are likely hosting the malicious payload. The document body and embedded links reinforce the lure of downloading a 'user manual'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9577

Heuristics 4

  • Fake 'free download' SEO-poisoning PDF critical PDF_SEO_FAKE_DOWNLOAD
    The ML classifier flagged this PDF AND it carries a visual download/call-to-action lure AND an off-domain server-side download-gateway link whose query string names a document payload. This three-signal conjunction is the fake-document / 'free PDF download' SEO-poisoning delivery pattern: the page is padded with benign decoy links to dilute classifier scores while funnelling the victim through the gateway to malware/scareware. Acting only on the conjunction keeps benign download-bearing PDFs from being misflagged.
  • 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://uncpbisdegree.com/download3.php?q=user-manual-from-singer-machine.pdf
    • http://uncpbisdegree.com/download4.php?q=user-manual-from-singer-machine.pdf
    • http://futura-support.com/products
    • http://homeappliance.manualsonline.com/manuals/mfg/singer/singer_sewing_machine_product_list.html
    • http://www.pre-place.com/singer/singer_service_manual_mo_18.pdf
    • http://downloadfreemanuals.com/kenmore-sewing-machine-manual/
    • http://uncpbisdegree.com/1/sylvia-s-mader-biology-lab-8-answers.pdf
    • http://uncpbisdegree.com/1/the-controversy-of-zion.pdf
    • http://uncpbisdegree.com/1/spectroscopy-by-chatwal-analysis.pdf
    • http://riverside-resort.net/1/waec-geography-2014-2015-question-and-answer.pdf
    • http://uncpbisdegree.com/1/study-in-norway-cost.pdf
    • http://uncpbisdegree.com/1/siemens-sonoline-g40-service-manual.pdf
    • http://uncpbisdegree.com/1/the-book-of-renfield-a-gospel-of-dracula.pdf
    • http://riverside-resort.net/1/urdu-farsi-up-board-exam-result.pdf
    • http://riverside-resort.net/1/wheelen-and-hunger-strategic-management-ebook.pdf
    • http://uncpbisdegree.com/1/textbook-rental-thibodaux-la.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://www.manualslib.com/manual/641378/Singer-6235.html
    • https://www.manualslib.com/brand/singer/
    • https://www.manualslib.com/brand/singer/sewing-machine.html
    • https://www.manualslib.com/products/Singer-62-35-353523.html
    • https://www.manualslib.com/manual/641384/Singer-6105.html
    • https://www.manualslib.com/products/Singer-6105-3172451.html
    • http://go.microsoft.com/fwlink/?LinkId=521839&CLCID=0409
    • http://go.microsoft.com/fwlink/?LinkID=246338&CLCID=0409
    • https://go.microsoft.com/fwlink/?linkid=868922
    • http://go.microsoft.com/fwlink/?LinkID=286759&CLCID=409
    • http://go.microsoft.com/fwlink/?LinkID=617297
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003c4c.bin
069bd02bf8c9b57c726c9bb24af568183a84601f0929d7d411036d0268f1337d
pdf-font-stream PDF embedded font (sfnt) at offset 0x3C4C 10324 bytes
font_01_sfnt_off00005d2d.bin
e2163d63cf040c4e4d39d3ed1f0cd9e312a71219095a03ed3e96b6bab9f15ac4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D2D 7080 bytes