Malicious PDF — malware analysis report

Static analysis result for SHA-256 155e448609e98620…

MALICIOUS

PDF

28.1 KB Created: 2018-06-11 09:56:53 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7)
MD5: 7de2f32c20c9d040d581c3cd5323470e SHA-1: 4486b49ff23c06b04a9bf6df12945c8241f2dfa1 SHA-256: 155e448609e986201ceaae4c8ee29f2d4fd39f5aed4e182f1894ebe0029cede9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF document is classified as malicious, exhibiting characteristics of SEO poisoning for fake downloads. The document body and heuristics indicate it directs users to download a file from 'uncpbisdegree.com', likely a malicious payload. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9683

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=shimadzu-manual-mobile-dart.pdf
    • http://uncpbisdegree.com/download4.php?q=shimadzu-manual-mobile-dart.pdf
    • http://www.tmicalibration.com/detailed-list-by-manufacturer.xls
    • http://riverside-resort.net/1/wedding-card-designs-diy.pdf
    • http://riverside-resort.net/1/volvo-850-engine-codes.pdf
    • http://riverside-resort.net/1/waec-mathematics-2017-objective-answers.pdf
    • http://riverside-resort.net/1/verizon-motorola-droid-razr-hd.pdf
    • http://riverside-resort.net/1/vectra-c-2003-manual.pdf
    • http://riverside-resort.net/1/vascular-technology-mock-exam.pdf
    • http://uncpbisdegree.com/1/suzuki-vl125-k6-owners-manual.pdf
    • http://uncpbisdegree.com/1/solutions-manual-engineering-mechanics-dynamics-13th-edition.pdf
    • http://uncpbisdegree.com/1/stratus-2000-engine.pdf
    • http://uncpbisdegree.com/1/the-aspiring-poets-journal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://www.google.com/maps/dir/Current+Location/-34.928619,138.59996
    • https://view.officeapps.live.com/op/view.aspx?src=http%3A%2F%2Fwww.tmicalibration.com%2Fdetailed-list-by-manufacturer.xls
    • 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_off000032c8.bin
9b57a248282266b7e9350dd5052a1a8a2323eaf04179c8d7a697375c5246f96f
pdf-font-stream PDF embedded font (sfnt) at offset 0x32C8 10704 bytes
font_01_sfnt_off000054a9.bin
38eb474dbb52ccde17505cf800f4b7ad92823660115dbe11875119817f055d2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x54A9 7056 bytes