Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bf89c2ad65448ad…

MALICIOUS

PDF

72.7 KB Created: 2021-02-16 01:36:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: fa2a2104dff4b241f80a973af872f5ff SHA-1: bbca3d40c8b7af142e419bc547f2ab070786664d SHA-256: 5bf89c2ad65448adc25f3b0b9d744bf70cecf1b5024d2e9dca06794d64f17366
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://seumenha.ru/wix?keyword=naming+binary+covalent+compounds+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450003/normal_6023e7d830952.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416131/normal_6019f88c64a9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470535/normal_600a726eb7fbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481420/normal_60186587c063d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zidumaxatu.epizy.com/tenukupawofiloko.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/mirapagow.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/foolproof_module_10_final_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/50889726974.pdfIn PDF document text
    • http://lilivuxaja.rf.gd/brochure_templates_free_for_word_2007.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/certificate_of_excellence_template_google_docs.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AC 5796 bytes
SHA-256: 9c1718d78e5e3b2a060f17cc16417ea0b5a36b56513757f499e46879d68e3292
font_01_sfnt_off0000e545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE545 9940 bytes
SHA-256: 9726021ede6e617bd775e9fa304253bb1372fb7cc13fffbb1229a48432c2001f
font_02_sfnt_off00010740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10740 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230