Malicious PDF — malware analysis report

Static analysis result for SHA-256 37bbfc95cb4d90d7…

MALICIOUS

PDF

72.9 KB Created: 2021-02-16 23:32:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 66dad0c47365e613157e83cc9aa9b64f SHA-1: 5b7fd4b2b9c48502af8492b85c5be34bbe361fd4 SHA-256: 37bbfc95cb4d90d701271f8f89d195301cafc2381bd143a24053349b8f3097e3
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=corydon+intermediate+school+staff In PDF document text
    • https://static.s123-cdn-static.com/uploads/4495390/normal_5ff89e59f3516.pdfIn PDF document text
    • http://hydrofthol.space/call_answering_machine_apk52ihj.pdfIn PDF document text
    • http://gigogon.22web.org/do_autocad_2019_estudante.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414156/normal_5ff00a03d92f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471464/normal_601ba7f5d90e8.pdfIn PDF document text
    • http://ital-tess.space/emergency_evacuation_route_templatejo9iz.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://wivifizurata.epizy.com/91180201890.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/wordscapes_level_1433_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/mathematical_modelling_in_control_system.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/97376331661.pdfIn PDF document text
    • http://dajejat.rf.gd/bootstrap_4_web_design_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/ak_logo_design.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/blank_swot_analysis_template_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/present_continuous_future_arrangements_worksheet.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_off0000d38b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38B 5176 bytes
SHA-256: 220e8051a638d4d13a4b867a2a2756a9eefb4669f31cdc57496afab092f93833
font_01_sfnt_off0000e4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F7 10356 bytes
SHA-256: e552700dc72fd3e0ea8ab9de95dfff014c15e41bb171eaaedac0db9dff668e8c
font_02_sfnt_off00010841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10841 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34