Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bd800bbb24682a8…

MALICIOUS

PDF

32.8 KB Created: 2018-06-11 09:49:54 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7)
MD5: 560fb4cd1ff8234e82ae8ccc844a5537 SHA-1: 449d624ec3a95d43a011422a14650465c540266a SHA-256: 5bd800bbb24682a8e19ac18e590e90305260048d6c2ca2ce780e13a583fb705e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file is identified as a fake 'free download' SEO-poisoning document. It contains external URIs pointing to download URLs, suggesting an attempt to trick users into downloading a payload. The document body, though partially garbled, includes references to statistics and download links, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9269

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=uses-of-official-statistics.pdf
    • http://uncpbisdegree.com/download4.php?q=uses-of-official-statistics.pdf
    • http://sigmazone.com/
    • http://statistics.gov.scot/
    • http://uncpbisdegree.com/1/service-provider-manual-boeing-suppliers.pdf
    • http://uncpbisdegree.com/1/ten-letters-the-stories-americans-tell-their-president.pdf
    • http://uncpbisdegree.com/1/shattered-innocence.pdf
    • http://riverside-resort.net/1/zentangle-jane-marbaix.pdf
    • http://uncpbisdegree.com/1/service-tax-applicable-on-directors-sitting-fees.pdf
    • http://uncpbisdegree.com/1/t-easy-phone-manual.pdf
    • http://uncpbisdegree.com/1/solutions-advanced-teacher-book.pdf
    • http://uncpbisdegree.com/1/tennessee-through-time-the-early-years-textbook.pdf
    • http://uncpbisdegree.com/1/skeletal-system-review-guide-answers.pdf
    • http://uncpbisdegree.com/1/skylanders-wii-instruction-manual.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.wimbledon.com/en_GB/scores/extrastats/index.html
    • https://www.eia.gov/
    • https://www.gold.org/data
    • https://www.google.com/analytics/
    • https://www.gov.uk/government/statistics
    • http://www.ssa.gov/OACT/babynames/
    • http://lame.sourceforge.net/links.php
    • https://www.gov.uk/government/consultations/changes-to-the-cold-weather-payments-official-statistics
    • https://www.bls.gov/tus/charts/
    • http://www.foobar2000.org/?page=Download
    • http://www.worldometers.info/water/
    • http://www.hse.gov.uk/statistics/
    • http://www.hse.gov.uk/aboutus/index.htm
    • https://www.salesforce.com/blog/
    • https://docs.oracle.com/database/121/TGSQL/tgsql_optcncpt.htm
    • https://www.google.com/analytics/surveys/
    • https://en.wikipedia.org/wiki/Aviation_safety
    • http://www.jblearning.com/catalog/9781284036015/
    • http://www.jblearning.com/health/biostatistics/
    • https://www.gold.org/data/gold-price
    • http://www.internetworldstats.com/stats.htm
    • https://en.wikipedia.org/wiki/List_of_FC_Barcelona_records_and_statistics
    • http://go.microsoft.com/fwlink/?LinkId=521839&CLCID=0409
    • http://go.microsoft.com/fwlink/?LinkID=246338&CLCID=0409
    • https://go.microsoft.com/fwlink/?linkid=868922
    • http://go.microsoft.com/fwlink/?LinkID=286759&CLCID=409
    • http://go.microsoft.com/fwlink/?LinkID=617297
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046cb.bin
aed603aee23d486d777f4793f13ad2e17e2d156405c8f04631707ad234014cbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46CB 9848 bytes
font_01_sfnt_off00006650.bin
c1182e72fb16a30df6d63843a0f94d4c274504f2a559d59dbbb2778e9e5d6145		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6650 6768 bytes

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