Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb41946d62659e8…

MALICIOUS

PDF

27.4 KB Created: 2018-06-11 09:52:54 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 0cdbc9fbb555d1b46656fa775715b0df SHA-1: fd7bcc5787097f49a82a819caa05a6bc4b8c8c7c SHA-256: beb41946d62659e85495d257c2979db7f539745e1c869b43bff040d000ea0d49
130 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The ML classifier flagged this PDF with high confidence. The document body contains multiple URLs pointing to potentially malicious download locations, such as http://uncpbisdegree.com/download3.php?q=the-road-to-chlifa-characters.pdf. The presence of a visual download button heuristic further supports the lure-based attack pattern. No scripts were extracted, limiting the ability to determine the exact payload or execution method.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9732

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=the-road-to-chlifa-characters.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=the-road-to-chlifa-characters.pdfIn PDF document text
    • http://uncpbisdegree.com/1/solution-manual-for-introduction-to-algorithms-by-thomas-h-cormen.pdfIn PDF document text
    • http://riverside-resort.net/1/used-6th-grade-social-studies-essentials-textbooks.pdfIn PDF document text
    • http://riverside-resort.net/1/wangsness-electromagnetic-answers-to-problems.pdfIn PDF document text
    • http://uncpbisdegree.com/1/st-francis-de-sales-and-the-bible.pdfIn PDF document text
    • http://uncpbisdegree.com/1/thailand-joy.pdfIn PDF document text
    • http://uncpbisdegree.com/1/sungale-pd-560-dvd-players-owners-manual.pdfIn PDF document text
    • http://uncpbisdegree.com/1/stage-3-lung-cancer-survival-time.pdfIn PDF document text
    • http://riverside-resort.net/1/universal-trailer-plug-wiring-diagram.pdfIn PDF document text
    • http://uncpbisdegree.com/1/solutions-for-geoscience-laboratory-tomman.pdfIn PDF document text
    • http://riverside-resort.net/1/wheel-of-fortune-template-game-on-powerpoint.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.supersummary.com/road-to-chlifa/summary/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_off0000322a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x322A 10572 bytes
SHA-256: 7a89651f1eaee843f6543674a0d6de7c8580819c5520e867355d1bb63a53d8ee
font_01_sfnt_off0000538e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x538E 6596 bytes
SHA-256: f6832795abfa556f2e7d42a5fe7d525b3deb0d1fdad62d661127d7a79a131c8b

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