Malicious PDF — malware analysis report

Static analysis result for SHA-256 01bb7b1b51a03953…

MALICIOUS

PDF

71.9 KB Created: 2021-02-13 12:53:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 9ac7a0c353fae36d40d5a01c457df88b SHA-1: 5236b15e50822911916f932a87564e09898f2372 SHA-256: 01bb7b1b51a0395386c44a5d8e1b4a192d3d066e8018bc8f8f4abcc048d59acf
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/wix?keyword=columbia+county+register+of+deeds+portage+wi PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4472506/normal_5ffdf46281c66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422135/normal_5ffa55655d0c0.pdfIn PDF document text
    • http://sumagezemorewo.22web.org/vibikuvafuwupep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472501/normal_5fd80fff73999.pdfIn PDF document text
    • https://cdn.sqhk.co/kominepoli/jeoiegf/espn_fantasy_draft_grades.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423750/normal_5fce18f65940f.pdfIn PDF document text
    • https://vipogonegope.weebly.com/uploads/1/3/0/9/130969266/fdcf6d.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/4hdGJij/game_maker_language_an_in-_depth_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420239/normal_5fcd67e72bcfa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417656/normal_60075a821a398.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kinadawefenipe.rf.gd/building_construction_notes.pdfIn PDF document text
    • http://damabop.epizy.com/71123438969.pdfIn PDF document text
    • http://lepejifilafimif.rf.gd/roots_of_quadratic_functions_worksheet.pdfIn PDF document text
    • http://likijanima.epizy.com/50548811644.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_off0000dbc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC2 5716 bytes
SHA-256: 85e055ccf6ab7a78963e80c4a532dd677500d6656be8a3b7cc42bfb91a1d70ac
font_01_sfnt_off0000ef29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF29 10428 bytes
SHA-256: 18da8f9f58cc50376b79398d797541540ee9079331ea5e0bd9eab7ca759277c4