Malicious PDF — malware analysis report

Static analysis result for SHA-256 71e90c34100ec006…

MALICIOUS

PDF

28.4 KB Created: 2018-06-11 08:30:24 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-09-04
MD5: ef2aed3277c2a609dcd824daed5092f0 SHA-1: 893f9a19d4e0179b0c726cbb4e46755ab46ee1f1 SHA-256: 71e90c34100ec0063cdcb4f2073d97176b2ec62ffb640c51b321ab0e9bbaea16
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier and a specific heuristic for fake download SEO poisoning. The document body contains numerous links, including the primary malicious URL http://uncpbisdegree.com/download3.php?q=swaziland-jurnior-certificate-past-examination-papers-science.pdf, which is presented as a download for educational materials. The presence of these links suggests the document's purpose is to trick the user into downloading a secondary payload.

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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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=swaziland-jurnior-certificate-past-examination-papers-science.pdf PDF link annotation
    • http://uncpbisdegree.com/download4.php?q=swaziland-jurnior-certificate-past-examination-papers-science.pdfIn PDF document text
    • http://riverside-resort.net/1/the-question-and-answer-for-jss3-examination-2018.pdfIn PDF document text
    • http://riverside-resort.net/1/suzuki-grand-vitara-xl-7-escudo-1997-2004-rus.pdfIn PDF document text
    • http://riverside-resort.net/1/turkish-financial-history-from-the-ottoman-empire-to-the-present.pdfIn PDF document text
    • http://riverside-resort.net/1/textual-sources-for-the-study-of-zoroastrianism.pdfIn PDF document text
    • http://riverside-resort.net/1/small-engine-service-manuals-free.pdfIn PDF document text
    • http://riverside-resort.net/1/toyota-corolla-haynes-repair-manual-for-2003-thru-2011-19412.pdfIn PDF document text
    • http://riverside-resort.net/1/the-urban-revolution.pdfIn PDF document text
    • http://riverside-resort.net/1/sony-ericsson-headset-mw600-manual.pdfIn PDF document text
    • http://riverside-resort.net/1/thermal-physics-second-edition-finn.pdfIn PDF document text
    • http://riverside-resort.net/1/top-score-1-workbook-answer.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_off00003317.bin
31f070e60328f2c522a1fbe5881607ae4bbd5cf43bb75a09e2dce13c336bf4e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3317 11132 bytes
font_01_sfnt_off00005630.bin
05aaae48158fe3c56955e1c0f0ffbba2867d448bc0b6844780f96bbd41790d9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5630 7072 bytes

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