Malicious PDF — malware analysis report

Static analysis result for SHA-256 393bc538899c5c3f…

MALICIOUS

PDF

32.2 KB Created: 2018-06-11 09:05:19 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7)
MD5: cf6c275222bdd0f357f03c9d5a112e94 SHA-1: 975b818ce45eac2aac52e2fd199f978a904922be SHA-256: 393bc538899c5c3f530da2f68469b0a0601f6d0b3644c659843767b400f27847
102 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a fake download lure, specifically using SEO poisoning to trick users searching for a 'vw golf 3 manual'. The document body and heuristics point to the URLs http://uncpbisdasdegree.com/download3.php?q=vw-golf-3-manual.pdf and http://uncpbisdasdegree.com/download4.php?q=vw-golf-3-manual.pdf as the download destinations. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9202

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=vw-golf-3-manual.pdf
    • http://uncpbisdegree.com/download4.php?q=vw-golf-3-manual.pdf
    • http://www.myturbodiesel.com/wiki/2010-vw-golf-tdi-fuel-filter-removal-replacement-service/
    • http://www.myturbodiesel.com/wiki/
    • http://www.spxprecision.com/vw-polo-manual-2015.pdf
    • http://www.myturbodiesel.com/wiki/manual-transmission-gear-oil-diy-service-and-fluid-replacement-mk4-vw-audi/
    • http://fastestlaps.com/models/vw-golf-r-mk-vii
    • https://www.jbugs.com/product/11-1070.html
    • http://riverside-resort.net/1/white-fluid-mechanics-5th-edition-solution-manual-rar.pdf
    • http://riverside-resort.net/1/why-are-storm-surges-dangerous.pdf
    • http://uncpbisdegree.com/1/super-cute-25-amigurumi-animals.pdf
    • http://uncpbisdegree.com/1/the-honours-list-who-gets-what-and-why.pdf
    • http://uncpbisdegree.com/1/the-fairy-godmother-five-hundred-kingdoms-1-mercedes-lackey.pdf
    • http://uncpbisdegree.com/1/service-manual-panasonic-kx-fl402.pdf
    • http://uncpbisdegree.com/1/sunday-school-lesson-stephen.pdf
    • http://riverside-resort.net/1/vocabulary-workshop-level-c-unit-10-answers.pdf
    • http://uncpbisdegree.com/1/thank-you-ma-am-test-1-answers.pdf
    • http://uncpbisdegree.com/1/speco-cvc-6705-security-cameras-owners-manual.pdf
    • http://wiki.ross-tech.com/wiki/index.php/VW_Golf_
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.vw.com/models/golf/
    • http://www.vw.com/models/golf-r/
    • https://en.wikipedia.org/wiki/Volkswagen_Golf
    • https://en.wikipedia.org/wiki/Volkswagen
    • https://www.manualslib.com/manual/758095/Volkswagen-Golf-2013.html
    • https://www.manualslib.com/brand/volkswagen/
    • https://www.manualslib.com/brand/volkswagen/automobile.html
    • https://www.manualslib.com/products/Volkswagen-Golf-2013-3471842.html
    • 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_off000041c8.bin
36afb713738e0875fbfa5bff25a96f3ca835ed5eca0df85264b104c31de9d009
pdf-font-stream PDF embedded font (sfnt) at offset 0x41C8 10660 bytes
font_01_sfnt_off000063a4.bin
7d93e4e041242512ed442332acaa6801022268a433f2e89ee04a81c6ee57ac2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x63A4 7088 bytes