Malicious PDF — malware analysis report

Static analysis result for SHA-256 15d354dfcae51646…

MALICIOUS

PDF

30.3 KB Created: 2018-06-11 09:56:35 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7)
MD5: 08475285ea539b8bfb421a4b371e254a SHA-1: effb3758ad39e02f9fa0561cc374db82d2cb83a5 SHA-256: 15d354dfcae51646bacb28f852881719f49c0108d3221b432f9ded01ec946ca9
102 Risk Score

Malware Insights

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

The PDF is flagged as a fake download lure, specifically using SEO poisoning techniques to trick users into downloading a malicious file. The embedded URLs point to a domain that is not associated with Verizon, suggesting a phishing attempt. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious workflow designed to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9511

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=verizon-4g-lte-pantech-manual.pdf
    • http://uncpbisdegree.com/download4.php?q=verizon-4g-lte-pantech-manual.pdf
    • https://b3n.org/verizon-4g-lte-rural-internet/
    • http://riverside-resort.net/1/the-cornered-cat-a-womans-guide-to-concealed-carry.pdf
    • http://riverside-resort.net/1/the-farm-tom-rob-smith.pdf
    • http://riverside-resort.net/1/tennessee-medical-laboratory-board-newsletter.pdf
    • http://riverside-resort.net/1/the-sbl-handbook-of-style.pdf
    • http://riverside-resort.net/1/solutions-brigham-financial-management-brigham-11th-edition.pdf
    • http://riverside-resort.net/1/toronto-catholic-district-school-board.pdf
    • http://riverside-resort.net/1/the-giant-book-of-horror-stories.pdf
    • http://riverside-resort.net/1/true-blue-and-carreras-bride-harlequin-bestsellers.pdf
    • http://riverside-resort.net/1/the-storybook-of-legends-ever-after-high-1-shannon-hale.pdf
    • http://riverside-resort.net/1/tiered-response-ems-system.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://www.verizonwireless.com/accessories/samsung-4g-lte-network-extender-2/
    • https://www.verizonwireless.com/accessories/
    • https://www.verizonwireless.com/accessories/signal-boosters/
    • https://www.verizonwireless.com/accessories/signal-boosters/samsung/
    • https://www.verizonwireless.com/support/lg-exalt-lte/
    • https://www.verizonwireless.com/support/lg/
    • https://www.manualslib.com/manual/807315/Pantech-Uml290.html
    • https://www.manualslib.com/brand/
    • https://www.manualslib.com/brand/pantech/
    • https://www.manualslib.com/brand/pantech/modem.html
    • https://www.manualslib.com/products/Pantech-Uml290-3565861.html
    • https://en.wikipedia.org/wiki/Samsung_Galaxy_S
    • 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_off00003cd7.bin
7c1911b9ee85d418a5035e757a8bbb2221306ce8b25f54f714b054f9da3ea284		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3CD7 10036 bytes
font_01_sfnt_off00005cc7.bin
e2ca7314926f6dd3dccbfdbcc78937abda2ac2be56e618e9de5dca6918a39605		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC7 6956 bytes

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