Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0906b760bf3ce44…

MALICIOUS

PDF

30.7 KB Created: 2018-06-11 09:27:56 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 0be0287ac6a8c036089f3a2bdddc1d42 SHA-1: c34d203e9dd7fda87c5a5915eea30070aeacb449 SHA-256: e0906b760bf3ce44135af2d46cb6974675a49db5731ff87124d781eb335174db
130 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded URLs pointing to a domain that appears to be distributing potentially malicious files. The ML classifier flagged this PDF with high confidence, and the presence of a download button lure further supports a malicious intent. The document body, though heavily obfuscated, contains references to download URLs, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9375

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-mhc-rg555-owners-manual.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=sony-mhc-rg555-owners-manual.pdfIn PDF document text
    • http://getmanual.com/In PDF document text
    • http://uncpbisdegree.com/1/the-battleship-bismarck-super-drawings-in-3d.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-feed-zone-cookbook-fast-and-flavorful-food-for-athletes-biju-thomas.pdfIn PDF document text
    • http://riverside-resort.net/1/visiting-card-design-vector.pdfIn PDF document text
    • http://uncpbisdegree.com/1/spongebob-controls-and-variables-worksheet-answers.pdfIn PDF document text
    • http://riverside-resort.net/1/vacume-diagrams-for-a-94-mazda-rx7-1-3l.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-asylum-prophecies.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-eaters-guide-to-chinese-characters.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-complete-sweep-series-1-15-cate-tiernan.pdfIn PDF document text
    • http://uncpbisdegree.com/1/siyavula-maths-grade-11-teachers-guide.pdfIn PDF document text
    • http://riverside-resort.net/1/yamaha-receiver-manual-rx-v571.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/1238322/Sony-Gtk-Xb5.htmlIn PDF document text
    • https://www.manualslib.com/brand/sony/In PDF document text
    • https://www.manualslib.com/brand/sony/stereo-system.htmlIn PDF document text
    • https://www.manualslib.com/products/Sony-Gtk-Xb5-6933184.htmlIn PDF document text
    • https://www.manualslib.com/manual/961452/Sony-Gtk-N1bt.htmlIn PDF document text
    • https://www.manualslib.com/brand/In 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_off00003b3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B3E 10820 bytes
SHA-256: d314ec45452839cd648d5c40b19a887a7454dac587d3ff4ba31e462562c12565
font_01_sfnt_off00005d7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7F 7388 bytes
SHA-256: e0f0376a438bd3a803e97d85d87f0950513cd74d92c67c172147ce1d0507c830

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