Malicious PDF — malware analysis report

Static analysis result for SHA-256 09cdf73e18dbdc58…

MALICIOUS

PDF

33.9 KB Created: 2018-06-11 09:39:54 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7)
MD5: c6e73bc341860cd11cd6057190a3d0b2 SHA-1: d6af6a6bcd4844169a96cff435c7ee1259f2f46d SHA-256: 09cdf73e18dbdc5855c8d1c778d00d632a77c071e549d9b31ef2eed66116f0e6
102 Risk Score

Malware Insights

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

The PDF was flagged by an ML classifier and a critical heuristic for being a fake 'free download' SEO-poisoning document. It contains embedded URLs pointing to 'uncpbisdegree.com', which likely serve as the gateway to a malicious download. The document body contains numerous URLs, some benign, but the primary malicious indicators point to a download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9395

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=service-management-fitzsimmons.pdf
    • http://uncpbisdegree.com/download4.php?q=service-management-fitzsimmons.pdf
    • http://www.manfitzlaw.com/
    • http://www.fitzsimmonsre.com.au/
    • http://www.rumberger.com/?t=3&A=1108&format=xml
    • http://www.fitzrents.com/
    • http://www.ronfitzsimmons.com/
    • https://www.auroragov.org/things_to_do/golf
    • https://mc-mgmt.com/
    • http://www.amesgough.com/
    • http://www.rhiservice.co.uk/
    • http://investors.suntrust.com/governance/management-team/default.aspx
    • https://www.fas.scot/downloads/farm-management-handbook-201718/
    • http://www.softwareqatest.com/qatweb1.html
    • http://www.perimeterbus.com/ExpressDrops.html
    • http://amcberkshire.org/at
    • http://ssi.armywarcollege.edu/
    • http://www.sfmtraining.co.uk/sia-training-results.html
    • http://www.isledegrande.com/around/around2018.php
    • http://uncpbisdegree.com/1/solar-engineering-of-thermal-processes-4th-edition.pdf
    • http://riverside-resort.net/1/who-fought-in-the-persian-wars.pdf
    • http://riverside-resort.net/1/vasili-and-vasilissa-siberian-stories.pdf
    • http://riverside-resort.net/1/weird-science-ghosts-of-fear-street-creepy-collections.pdf
    • http://uncpbisdegree.com/1/the-general-prologue-to-the-canterbury-tales.pdf
    • http://riverside-resort.net/1/united-solution-tools-generators.pdf
    • http://uncpbisdegree.com/1/shakespeare-and-the-american-popular-stage.pdf
    • http://uncpbisdegree.com/1/test-question-distractors.pdf
    • http://uncpbisdegree.com/1/sweetland-michael-crummey.pdf
    • http://uncpbisdegree.com/1/survival-analysis-a-self-learning-text.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.chegg.com/homework-help/service-management-7th-edition-chapter-6.3-solutions-9780073403359
    • https://finance.yahoo.com/news/suntrust-names-ellen-fitzsimmons-general-205500489.html
    • http://www.dallascounty.org/department/districtclerk/districtclerk_index.html
    • http://www4.rgu.ac.uk/prospectus/modules/disp_moduleView.cfm?Descriptor=BSM311
    • http://tucson.com/news/opinion/
    • https://en.wikipedia.org/wiki/New_South_Wales_Rural_Fire_Service
    • http://www.academia.edu/31441282/Operations_Management_12th_Edition_2015_William_J_Stevenson.pdf
    • https://www.bloomberg.com/markets/stocks
    • http://www.detroitlions.com/team/administration.html
    • http://www.ustream.tv/joerogan
    • 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://en.wikipedia.org/wiki/Service_
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049a7.bin
2908e824663eb81766065b623b4c9e3b35aeba429fa4079dba4960c5fe76422c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49A7 10104 bytes
font_01_sfnt_off000069e1.bin
301be3d81c282a9287f43588d52cfa34b9582d668dcd76778236a4cf5491efca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69E1 6960 bytes

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