Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1ee1ba0145748f9…

MALICIOUS

PDF

78.5 KB Created: 2021-03-24 11:43:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: bf6056bf911f8351309d4349d2932a65 SHA-1: 80a58812e2649fe5fccae17bc42d9b82288bf283 SHA-256: d1ee1ba0145748f9d6862603bf0e1d359a0c9eeaa544f84ed3c2ee35ae34d17a
136 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URL that redirects to a phishing lure related to 'Kitchenaid professional 600 series 6-quart stand mixer parts'. The presence of PDF_SEO_UTM_REDIRECTOR_LINK heuristic indicates a phishing attempt using an image lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 https://pelibifir.ru/strik?utm_term=kitchenaid+professional+600+series+6-quart+stand+mixer+parts PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4420434/normal_5fecf403d687f.pdfIn PDF document text
    • http://xewaxoweva.22web.org/rutas_senderismo_sierra_de_aracena.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488855/normal_5fef898491fba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425933/normal_60584f824cfbe.pdfIn PDF document text
    • http://rakuropa.iblogger.org/32151749134.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372735/normal_5fc60d660ff79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372355/normal_5fd18e7bdcf47.pdfIn PDF document text
    • http://zugemuvireri.22web.org/36869850466.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5bf8135-86cf-4d7c-80d5-3ff06ee4ee95/how_to_reset_the_toner_light_on_a_brother_printer.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/24557466671.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/laser_cutting_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/99729009286.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/serial_dilution_practice_problems_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/line_plot_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc87128d-6f2a-4e05-8fe2-e1a9b1bc30df/information_security_handbook_for_network_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fa77200-4843-4a53-8d1d-b1f2da160b01/how_much_do_car_service_cost.pdfIn PDF document text
    • http://giwoxig.rf.gd/hi_guess_the_restaurant_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7be16b87-0cc8-4b5e-86c1-d4b723ae66e2/keurig_single_cup_coffee_maker_bed_bath_and_beyond.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/kirby_air_ride_city_trial_checklist_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/354b7127-8a6e-44f3-a8e2-81037727e313/presto_21_qt_pressure_canner_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/authorized_representative_form_medicaid_florida.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/chameleon_run_full_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/lugovorajivemoxakuxil.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f04e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04E 5884 bytes
SHA-256: dbd7fe77b16a47eda174823d0b852599bafb70c75eadc2379fc89dc3175adee3
font_01_sfnt_off00010439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10439 11132 bytes
SHA-256: ddddf60342c2290a6674563143d1c2d88d60ef1b3e188de5b75dbff9236fd28a