Malicious PDF — malware analysis report

Static analysis result for SHA-256 b06ea8f6d0e2d91a…

MALICIOUS

PDF

27.7 KB Created: 2018-06-11 09:01:06 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-08-25
MD5: bbd61e949edf50348bc823f1e688c281 SHA-1: ca9c6cdc9f1e4d2dd27027eea69e64e2a00b7d49 SHA-256: b06ea8f6d0e2d91a5229c78a0ab654f8a19d0cdb6feebaf5f6c69994e5ff1a72
130 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The ML classifier strongly flagged this PDF as malicious. The document contains embedded URLs, including one at offset 0x5C6 pointing to 'http://uncpbisdegree.com/download3.php?q=unipoint-solenoid-wiring-diagram.pdf', which is likely a lure for a malicious download. The presence of a visual download button heuristic further supports this attack pattern. No scripts were extracted, limiting the analysis of the payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9664

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=unipoint-solenoid-wiring-diagram.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=unipoint-solenoid-wiring-diagram.pdfIn PDF document text
    • http://riverside-resort.net/1/the-american-vision-modern-times-guided-reading-activity-17-1.pdfIn PDF document text
    • http://riverside-resort.net/1/the-uses-of-enchantment-meaning-and-importance-fairy-tales-bruno-bettelheim.pdfIn PDF document text
    • http://riverside-resort.net/1/toro-lawn-mower-troubleshooting-guide.pdfIn PDF document text
    • http://riverside-resort.net/1/toyota-hilux-service-repair-manual-2005.pdfIn PDF document text
    • http://riverside-resort.net/1/umich-2015-chem-210-coursepack-answers.pdfIn PDF document text
    • http://riverside-resort.net/1/teaching-mixtures-and-solutions-fifth-grade.pdfIn PDF document text
    • http://riverside-resort.net/1/stufen-international-3.pdfIn PDF document text
    • http://riverside-resort.net/1/teddy-roosevelt-facts.pdfIn PDF document text
    • http://riverside-resort.net/1/the-enchantment-of-modern-life-attachments-crossings-and-ethics.pdfIn PDF document text
    • http://riverside-resort.net/1/the-woman-who-wouldnt-die-dr-siri-paiboun-9-colin-cotterill.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000031b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B8 10544 bytes
SHA-256: f4d73e61357a8f6c536a26cb09b0925eb8104ee8172caff4f0afec5358b0e5d3
font_01_sfnt_off0000530d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x530D 7152 bytes
SHA-256: 8b8e556a5dc59265a6b3fa3225fd04d51ee65d6b53d8d3d76628082ddd2f5aab

Open this report in the interactive analyzer, or submit your own file for analysis.