Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c2d7c5c6d9c6306…

MALICIOUS

PDF

35.8 KB Created: 2018-06-11 08:50:37 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 87f7e5a823c134aed045a99e701dc974 SHA-1: cfb25e7398d02d241c6c9f3b3ec40506e2886609 SHA-256: 1c2d7c5c6d9c6306f06902a90d3fda8dc2b42c227352067548d1c9859fbcaf7a
130 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9062

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.
  • PDF carries a PHP-gateway SEO-spam PDF link farm medium PDF_SEO_PHP_GATEWAY_LINK_FARM
    PDF contains four or more clickable links whose target is a `.php` gateway with a multi-word search-PHRASE document slug embedded after it (e.g. 'index.php?.../binary+options+trading+nz.pdf' or 'pdf.php/cialis-dosage-side-effects.pdf'). Legitimate PHP-served documents use a filename or numeric id, not a search-query phrase, so this is the generated SEO link-farm shape — pharma / binary-options / 'free download' spam that ranks for queries and routes users into payload/redirect chains. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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
  • 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=solution-manual-wireless-communication-principles-and-practice.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=solution-manual-wireless-communication-principles-and-practice.pdfIn PDF document text
    • https://www.automotiveisac.com/best-practices/In PDF document text
    • http://www.wowebook.org/In PDF document text
    • https://wisemen.com/In PDF document text
    • http://redrumcabo.com/forums/forum/redrum-shareboard/In PDF document text
    • http://scatterbrain.network/In PDF document text
    • http://www.wilsonmar.com/wireless.htmIn PDF document text
    • http://www.bibme.org/In PDF document text
    • https://www.instituteforapprenticeships.org/apprenticeship-standards/digital-and-technology-solution-specialist-degree/In PDF document text
    • https://www.mghihp.edu/overview/doctor-nursing-practiceIn PDF document text
    • http://www.calculatoredge.com/index.htmIn PDF document text
    • http://www.information-iii.org/abs_e2.htmlIn PDF document text
    • http://www.farmingdale.edu/course-offerings/catalog_2017_2018.htmlIn PDF document text
    • http://riverside-resort.net/1/the-wto-and-the-environment-development-of-competence-beyond-trade.pdfIn PDF document text
    • http://riverside-resort.net/1/sony-cdx-gt565up-installation-manual.pdfIn PDF document text
    • http://riverside-resort.net/1/tud5-diesel-engine.pdfIn PDF document text
    • http://riverside-resort.net/1/technics-1210-mk2-service-manual.pdfIn PDF document text
    • http://riverside-resort.net/1/tukaran-wang-asing.pdfIn PDF document text
    • http://riverside-resort.net/1/thriving-on-vague-objectives-a-dilbert-collection.pdfIn PDF document text
    • http://riverside-resort.net/1/the-secrets-of-alchemy.pdfIn PDF document text
    • http://riverside-resort.net/1/sylvia-day-aftershock-tuebl.pdfIn PDF document text
    • http://riverside-resort.net/1/slam-kicks-basketball-sneakers-that-changed-the-game.pdfIn PDF document text
    • http://riverside-resort.net/1/stacy-adams-boys-shoe-owners-manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://www.yokogawa.com/industries/power/In PDF document text
    • https://www.sciencedirect.com/science/article/pii/S1389128608001254In PDF document text
    • https://www.arubanetworks.com/en-au/resources/In PDF document text
    • https://www.manualslib.com/manual/529226/Agilent-Technologies-Vee-Pro.htmlIn PDF document text
    • https://www.manualslib.com/brand/agilent-technologies/software.htmlIn PDF document text
    • https://www.manualslib.com/products/Agilent-Technologies-Vee-Pro-2960590.htmlIn PDF document text
    • https://www.britannica.com/technology/television-technology/Principles-of-television-systemsIn PDF document text
    • https://en.wikipedia.org/wiki/EHealthIn PDF document text
    • http://www.onsemi.com/PowerSolutions/product.do?id=BELASIGNAIn PDF document text
    • https://en.wikipedia.org/wiki/Orthogonal_frequency-division_multiplexingIn PDF document text
    • https://www.manualslib.com/manual/1161609/Ford-2017-Explorer.htmlIn PDF document text
    • https://www.manualslib.com/brand/ford/In PDF document text
    • https://www.manualslib.com/brand/ford/automobile.htmlIn PDF document text
    • https://www.manualslib.com/products/Ford-2017-Explorer-4493440.htmlIn PDF document text
    • https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Compliance/Compliance_DG/PCI_Compliance_DG/ch4_PCI.htmlIn PDF document text
    • https://www.ofcom.org.uk/spectrum/information/spectrum-information-system-sisIn PDF document text
    • https://www.blackhat.com/us-16/briefings.htmlIn PDF document text
    • https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND/QoS-SRND-Book/QoSDesign.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_off000050ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50AC 10292 bytes
SHA-256: 2e4efc93c6cbfd2adebb1869a6d797327a2171f5726a29134a0b1b6c805466dd
font_01_sfnt_off00007158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7158 6836 bytes
SHA-256: 89b774915ba60f2519ac3bcb52c2edb74fd8dfee55debcc9da056fb9f9bcee28