Malicious PDF — malware analysis report

Static analysis result for SHA-256 db92079cb80d7727…

MALICIOUS

PDF

68.6 KB Created: 2021-02-15 16:13:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 94cac39cdd153a58e2510129dacc3d61 SHA-1: 640c4d9517d56f8dc541775df9b19cb504970f09 SHA-256: db92079cb80d77275f93688c5dca98f33ce501d905d2628544458a84601deb15
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wix?keyword=direct+variation+worksheet+with+answers+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476418/normal_5fdbd59d65804.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491669/normal_5fdb6ee476cdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403120/normal_6015cb02cc3f3.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxiropuwomo/YgdgdOE/81994844578.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387427/normal_5ff5e7cf7bbe5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500674/normal_60295f5b5a5e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385214/normal_5fcf27d085f0b.pdfIn PDF document text
    • https://cdn.sqhk.co/buzodafevuj/iidWidb/angry_birds_dream_blast_level_209.pdfIn PDF document text
    • https://cdn.sqhk.co/wivodojeg/wJjgxjc/h._i._d._e._mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bidivo/56843480789.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/fimurewebukemekonetur.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/kipegipusefoluwojunibad.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/openfoam_boundary_conditions.pdfIn PDF document text
    • https://s3.amazonaws.com/wujanozo/54526796449.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_off0000cfea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFEA 5424 bytes
SHA-256: 73b5de34bafc0032cb20e21a59062586f323c4fa1f4d182e33019e9783307e0f
font_01_sfnt_off0000e27c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27C 10220 bytes
SHA-256: b59cbbdfd8f607ac911cae39168911e10714caaf38eb23256ff70e489ea5e629