Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec6f131bca13c40…

MALICIOUS

PDF

31.9 KB Created: 2018-06-11 09:20:59 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 6e08f0b1c032aec5b6d47566c2434ba2 SHA-1: 29e08d8012ddc0008bf3265de01465e0dbb272f8 SHA-256: cec6f131bca13c40ad1cfc8a8fe955759bc0e09acc02cf78969b6c90e2b30730
130 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8944

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.
  • PDF carries a PHP-gateway SEO-spam PDF link farm medium PDF_SEO_PHP_GATEWAY_LINK_FARM
    PDF contains four or more clickable links whose target is a `.php` gateway with a multi-word search-PHRASE document slug embedded after it (e.g. 'index.php?.../binary+options+trading+nz.pdf' or 'pdf.php/cialis-dosage-side-effects.pdf'). Legitimate PHP-served documents use a filename or numeric id, not a search-query phrase, so this is the generated SEO link-farm shape — pharma / binary-options / 'free download' spam that ranks for queries and routes users into payload/redirect chains. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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
  • 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=sony-dcr-sr45-manual.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=sony-dcr-sr45-manual.pdfIn PDF document text
    • http://burnscamp.org.uk/picking-winners-a-horseplayers-guide.pdfIn PDF document text
    • http://getmanual.com/In PDF document text
    • http://grauonline.de/cms2/?page_id=111In PDF document text
    • https://1mbed.com/In PDF document text
    • http://www.sidunea.aduana.gob.bo/FDM_OFFLINE/FDM_OFF_LINE_V2-1.xlsIn PDF document text
    • http://uncpbisdegree.com/1/snowy-owls-pebble-books.pdfIn PDF document text
    • http://uncpbisdegree.com/1/service-manual-fz18.pdfIn PDF document text
    • http://uncpbisdegree.com/1/starting-out-with-visual-c-2018-solutions.pdfIn PDF document text
    • http://uncpbisdegree.com/1/technics-amplifiers-user-guide.pdfIn PDF document text
    • http://uncpbisdegree.com/1/take-two-a-celebration-of-twins.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-investment-answer-review.pdfIn PDF document text
    • http://riverside-resort.net/1/words-to-outlive-us-eyewitness-accounts-from-the-warsaw-ghetto.pdfIn PDF document text
    • http://uncpbisdegree.com/1/suzuki-50cc-workshop-manual.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-chalice-of-blood-sister-fidelma-mysteries-book-21.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-chicago-manual-of-style-university-press.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://www.manualslib.com/manual/157813/Sony-Dcr-Sr45-HandycamAndreg.htmlIn PDF document text
    • https://www.manualslib.com/brand/sony/camcorder.htmlIn PDF document text
    • https://www.manualslib.com/products/Sony-Dcr-Sr45-HandycamAndreg-361759.htmlIn PDF document text
    • https://www.manualslib.com/manual/907005/Sony-Nex-Fs700.htmlIn PDF document text
    • https://www.manualslib.com/brand/sony/In PDF document text
    • https://www.manualslib.com/products/Sony-Nex-Fs700-3056674.htmlIn PDF document text
    • https://www.sony.com/all-electronicsIn PDF document text
    • https://digital-photography-school.com/image-stabilization-on-tripods/In PDF document text
    • http://www.microsofttranslator.com/bv.aspx?ref=SERP&br=ro&mkt=en-US&dl=en&lp=FR_EN&a=https%3a%2f%2f1mbed.com%2fIn PDF document text
    • https://view.officeapps.live.com/op/view.aspx?src=http%3A%2F%2Fwww.sidunea.aduana.gob.bo%2FFDM_OFFLINE%2FFDM_OFF_LINE_V2-1.xlsIn PDF document text
    • http://go.microsoft.com/fwlink/?LinkId=521839&CLCID=0409In PDF document text
    • http://go.microsoft.com/fwlink/?LinkID=246338&CLCID=0409In PDF document text
    • https://go.microsoft.com/fwlink/?linkid=868922In PDF document text
    • http://go.microsoft.com/fwlink/?LinkID=286759&CLCID=409In PDF document text
    • http://go.microsoft.com/fwlink/?LinkID=617297In PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000426b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x426B 10004 bytes
SHA-256: 31d753d69122710204186e1b0e2ca1639d7f906371117755f941852aaed8af6e
font_01_sfnt_off0000624f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x624F 7120 bytes
SHA-256: ec83cff4c40227133df4c39829ceb463dccddfcc0b18d9f34154868e221d9484