Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b33ad7fe3a5fedc…

MALICIOUS

PDF

34.1 KB Created: 2018-06-11 08:12:32 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1f43a4aa9ff728b0efd9d5864a67dcc0 SHA-1: 71f985f107f8e4d471bc69b4815ca1a70efa297b SHA-256: 9b33ad7fe3a5fedccfd9db7bafa658fad5d5c00d18a1a499622d94fb0abfec63
102 Risk Score

Malware Insights

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

The PDF document is identified as a fake 'free download' SEO-poisoning lure, specifically impersonating a Canon EOS 10D user guide. It contains embedded URLs pointing to suspicious download domains, such as http://uncpbisdegree.com/download3.php?q=user-guide-canon-eos-10d.pdf, which likely serve as a gateway to a malicious payload. The presence of ML_NYX_PDF_MALICIOUS and PDF_SEO_FAKE_DOWNLOAD heuristics strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9340

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=user-guide-canon-eos-10d.pdf PDF link annotation
    • http://uncpbisdegree.com/download4.php?q=user-guide-canon-eos-10d.pdfIn PDF document text
    • http://canon.manualnguide.com/In PDF document text
    • http://www.normankoren.com/EOS-10D.htmlIn PDF document text
    • https://www.spt.info/sptstore.php/canon-eos-80d/software-canon-eos-80d-professional-advancedIn PDF document text
    • http://www.birdsasart.com/bn.htmlIn PDF document text
    • https://www.lifepixel.com/shop/our-services/infrared-camera-conversions/canon-dslr-infrared-conversionIn PDF document text
    • http://www.fastpictureviewer.com/codecs/In PDF document text
    • http://www.imatest.com/docs/sfrplus_instructions/In PDF document text
    • http://riverside-resort.net/1/venn-diagram-topics-elementary.pdfIn PDF document text
    • http://riverside-resort.net/1/vx-commodore-fault-codes-list.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-first-r-how-children-learn-race-and-racism.pdfIn PDF document text
    • http://uncpbisdegree.com/1/sony-icd-30-voice-recorders-owners-manual.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-comic-book-script-archive.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-geneva-trap-a-liz-carlyle-novel-liz-carlyle-novels-book-7.pdfIn PDF document text
    • http://riverside-resort.net/1/what-every-teacher-should-know-about-student-assessment.pdfIn PDF document text
    • http://riverside-resort.net/1/valor-in-the-ashes.pdfIn PDF document text
    • http://uncpbisdegree.com/1/singer-strength-of-materials-solution.pdfIn PDF document text
    • http://uncpbisdegree.com/1/solutions-to-auditing-assurance-services-14th-edition.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/415306/Canon-Eos-1v.htmlIn PDF document text
    • https://www.manualslib.com/products/Canon-Eos-1v-Eos-1v-Professional-Slr-Body-2752405.htmlIn PDF document text
    • https://www.kenrockwell.com/canon/index.htmIn PDF document text
    • https://en.wikipedia.org/wiki/Canon_EOS_400DIn PDF document text
    • https://www.manualslib.com/manual/220530/Canon-Eos-300d.htmlIn PDF document text
    • https://www.manualslib.com/brand/canon/digital-camera.htmlIn PDF document text
    • https://www.manualslib.com/products/Canon-Eos-Eos-300d-3395421.htmlIn PDF document text
    • https://www.usa.canon.com/internet/portal/us/home/products/details/cameras/dslr/eos-70dIn PDF document text
    • https://www.usa.canon.com/internet/portal/us/homeIn PDF document text
    • https://www.usa.canon.com/internet/portal/us/home/productsIn PDF document text
    • https://en.wikipedia.org/wiki/Canon_EOS_1000DIn PDF document text
    • https://www.dpreview.com/reviews/canon-eos-rebel-t7i-800dIn PDF document text
    • https://www.aliexpress.com/item/DigitalBoy-1PCS-2000mAh-BP-511A-BP-500-BP511A-BP511-BP-511-Camera-Battery-For-Canon-EOS/32696058959.htmlIn PDF document text
    • https://www.the-digital-picture.com/Reviews/Canon-EOS-1D-X-Digital-SLR-Camera-Review.aspxIn PDF document text
    • https://www.the-digital-picture.com/Reviews/In PDF document text
    • https://www.kenrockwell.com/canon/7d.htmIn PDF document text
    • https://www.aliexpress.com/item/INSEESI-LCD-FSK-2-4GHz-Transceiver-Pixel-T6-Wireless-Timer-Remote-Control-For-Canon-with-N3/32835842562.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_off00004949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4949 10216 bytes
SHA-256: 3fc55f6de611b0f1b2f3e6a103968d934ead2d9c9913629436b6fc4b23cf0390
font_01_sfnt_off000069f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69F1 7340 bytes
SHA-256: 2024e57b41181e6114683b21a949ce62577ac91c7a27e1aeff8f4b124fee2c8f