Malicious PDF — malware analysis report

Static analysis result for SHA-256 579a65e0cd4ec8a1…

MALICIOUS

PDF

27.9 KB Created: 2018-06-11 09:59:18 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 2125dd9f4b98257c5d638cbeb624490d SHA-1: b6396b1515a3bea397ebd2a3befc5aad457e7663 SHA-256: 579a65e0cd4ec8a17cdc487adb7f4b096c81bd9046e413ad2eca73e3ce4c9392
130 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF document contains embedded URLs and a document body that mimics a search result for a 'suzuki swift 1994 wiring diagramm'. The presence of multiple unknown reputation URLs, particularly 'http://uncpbisdegree.com/download3.php?q=suzuki-swift-1994-wiring-diagramm.pdf', strongly suggests a phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious, increasing confidence in this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9680

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=suzuki-swift-1994-wiring-diagramm.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=suzuki-swift-1994-wiring-diagramm.pdfIn PDF document text
    • http://fukuokajapan.loan/Zamboanga-Philippines/Zamboanga-Philippines-ky.phpIn PDF document text
    • http://riverside-resort.net/1/trane-air-conditioning-commercial-manual.pdfIn PDF document text
    • http://riverside-resort.net/1/sparrow-phil-hale-volume-2-number-5-art-book-series.pdfIn PDF document text
    • http://riverside-resort.net/1/the-sprituality-of-the-little-shepards.pdfIn PDF document text
    • http://riverside-resort.net/1/theses-on-feuerbach.pdfIn PDF document text
    • http://riverside-resort.net/1/syria-population.pdfIn PDF document text
    • http://riverside-resort.net/1/stone-a-legacy-and-inspiration-for-art.pdfIn PDF document text
    • http://riverside-resort.net/1/timberlake-laboratory-manual-answer-key.pdfIn PDF document text
    • http://riverside-resort.net/1/staar-math-workbook.pdfIn PDF document text
    • http://riverside-resort.net/1/the-super-chef-contest-geronimo-stilton-58.pdfIn PDF document text
    • http://riverside-resort.net/1/sol-de-breda-el.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_off0000317f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x317F 10280 bytes
SHA-256: 12c9fb8c41b5ecd0832e31e47fc240564dbc62ec1281cfdd9b7b4f9ee6cffd9e
font_01_sfnt_off00005210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5210 7716 bytes
SHA-256: 2405095a89ca1e47ca2fcf42672a5f3a04bcfdb0373f077b0056375bbf10b82c

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