Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cd359328c9e7b9e…

MALICIOUS

PDF

35.8 KB Created: 2018-06-11 08:36:11 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7)
MD5: ee0c061310adfef8f706d30b09b5d7d7 SHA-1: 8f48b862ed9d81ce0e68982193b7b78087ee8bff SHA-256: 5cd359328c9e7b9e8da96e0c7b4e1041e1826faa972f63451386352849253b92
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF is identified as a fake 'free download' SEO-poisoning lure. It contains external URIs pointing to download URLs, such as http://uncpbisdegree.com/download3.php?q=the-pvc-project-book-101-uses-for-pvc-pipe-in-the-home-garden-farm-and-workshop.pdf, which are likely used to deliver a malicious payload. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8955

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=the-pvc-project-book-101-uses-for-pvc-pipe-in-the-home-garden-farm-and-workshop.pdf
    • http://uncpbisdegree.com/download4.php?q=the-pvc-project-book-101-uses-for-pvc-pipe-in-the-home-garden-farm-and-workshop.pdf
    • http://www.pvcworkshop.com/PVCbookstore.htm
    • http://diyshedplanseasy.com/build-a-steve-redmond-boat/8x12-canvas-print=pb17582/
    • http://howtobuildsheddiy.com/plans.for.cedar.picnic.table/diy.sawhorse.desk.plans=rc3258/
    • http://diygardenshedplansez.com/cost-of-a-storage-shed/used-resin-storage-sheds=cg8245/
    • http://www.backwoodshome.com/features/author-index/
    • http://www.naturalbuildingblog.com/bulletin-board/
    • http://www.architecture.com.au/cpd-education/national/refuel
    • http://torrentz.eu/search.html
    • http://www.cablesfarm.co.uk/
    • https://www.lynneknowlton.com/diy-grapevine-lighting-balls-what-a-bright-idea/
    • http://www.agardenforthehouse.com/2009/06/ask-kevin/
    • http://www.hornywhores.net/
    • http://www.forwarders.com/tradeforum/tradeforum.html
    • http://hamburggermany.men/Hamburg-Germany/Hamburg-Germany_bb.php
    • http://truckwaale.com/enquiry/
    • https://www.greenoptimistic.com/free-energy-magnetic-motor/
    • http://riverside-resort.net/1/tarbuck-and-lutgens-earth-science-answers.pdf
    • http://riverside-resort.net/1/springboard-for-11th-grade-english.pdf
    • http://riverside-resort.net/1/the-work-of-hipgnosis-walk-away-rene.pdf
    • http://riverside-resort.net/1/the-advisory-book.pdf
    • http://riverside-resort.net/1/solution-manual-discrete-event-simulation-jerry-4.pdf
    • http://riverside-resort.net/1/supplemental-problems-physics-answers.pdf
    • http://riverside-resort.net/1/solution-11-167-the-book-of-scotlands.pdf
    • http://riverside-resort.net/1/the-lone-woman-of-san-nicolas-island.pdf
    • http://riverside-resort.net/1/the-comeback.pdf
    • http://riverside-resort.net/1/the-complete-pokmon-pocket-guide-book.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://www.ebay.com/gds
    • http://procurement-notices.undp.org/search.cfm?order_by=deadline
    • http://dupontinvestigation.blogspot.com/2014/02/dupont-investigation-following.html
    • https://www.scribd.com/document/181932008/500-Business-Ideas-pdf
    • http://blogs.discovermagazine.com/realitybase/2008/07/22/charged-with-a-crime-better-check-your-facebook-pictures/
    • http://www.dictionary.com/e/s/word-of-the-year-list/
    • 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_off00004e46.bin
54f9b78226e21bf7bf717c0cd5ddad23db4763d3b1b1b48a72f88eb166a97413
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E46 10204 bytes
font_01_sfnt_off00006ec4.bin
5bf0aa16380be6398b2834034237b67851e403a6cfa71373fd97dbd2b3f56abc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC4 7828 bytes