Malicious PDF — malware analysis report

Static analysis result for SHA-256 d37120cfc0cfb737…

MALICIOUS

PDF

31.1 KB Created: 2018-06-11 09:06:10 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d93cca281f0dbbdbb7e0e68986a90280 SHA-1: 5d76f8a38eebdb23afac91c050fbf054fd2cf580 SHA-256: d37120cfc0cfb737f97283e2333d54fc60ef5595a8f72223187ef95ef409ed6a
102 Risk Score

Malware Insights

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

The PDF document employs SEO poisoning to trick users into downloading a file disguised as a wiring diagram. It contains embedded URLs that lead to suspicious download pages, indicating an attempt to deliver a malicious payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9699

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=wiring-diagram-mazda-626-18.pdf PDF link annotation
    • http://uncpbisdegree.com/download4.php?q=wiring-diagram-mazda-626-18.pdfIn PDF document text
    • http://www.modifiedlife.com/request-a-mazda-remote-start-wiring-diagram/In PDF document text
    • http://wright-here.net/cars/rx7/manuals.htmlIn PDF document text
    • http://www.autogenius.info/volkswagen-transporter-t5-essentials-from-september-2009-fuse-box-diagram/In PDF document text
    • https://www.themanualstore.com/Boat-Manual-s/210.htmIn PDF document text
    • https://www.themanualstore.com/Wisconsin-VH4D-Engine-Manuals-s/35825.htmIn PDF document text
    • http://riverside-resort.net/1/waec-2017-practical-chemistry-alternative-b-questions-and-answer.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-insanity-of-god-a-true-story-faith-resurrected-nik-ripken.pdfIn PDF document text
    • http://uncpbisdegree.com/1/serving-on-a-board-of-directors-nonprofit.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-hostile-trail-matt-slaughter-series.pdfIn PDF document text
    • http://riverside-resort.net/1/xtreme-past-paper-5070chemistry-paper-2.pdfIn PDF document text
    • http://riverside-resort.net/1/vocabulary-packet-answers-world-literature.pdfIn PDF document text
    • http://uncpbisdegree.com/1/standard-horizon-hx290-manual.pdfIn PDF document text
    • http://uncpbisdegree.com/1/substation-design-manual.pdfIn PDF document text
    • http://uncpbisdegree.com/1/studies-in-class-structure-ils-121-1st-edition.pdfIn PDF document text
    • http://uncpbisdegree.com/1/service-manual-honda-accord.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://www.manualslib.com/manual/466150/Mazda-626.htmlIn PDF document text
    • https://www.manualslib.com/brand/mazda/automobile.htmlIn PDF document text
    • https://www.manualslib.com/products/Mazda-626-Station-Wagon-3753906.htmlIn PDF document text
    • https://www.manualslib.com/manual/904346/Mazda-626.htmlIn PDF document text
    • http://go.microsoft.com/fwlink/?LinkId=521839&CLCID=0409In PDF document text
    • http://go.microsoft.com/fwlink/?LinkID=246338&CLCID=0409In PDF document text
    • https://go.microsoft.com/fwlink/?linkid=868922In PDF document text
    • http://go.microsoft.com/fwlink/?LinkID=286759&CLCID=409In PDF document text
    • http://go.microsoft.com/fwlink/?LinkID=617297In PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BE5 10848 bytes
SHA-256: 5186a38e2923071bc4d916861c2a2e5a97d0fa755696354fce783f75b4667331
font_01_sfnt_off00005e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E36 7600 bytes
SHA-256: 45c7de4e3ba549d9c82fcd74bba71f81c725dc604b8caa8965620ed6fb99445c

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