Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab82508108b5e3fb…

MALICIOUS

PDF

66.0 KB Created: 2021-02-13 10:19:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4d992972a246abfa748fbd5fa31af634 SHA-1: 6e93295b4a8e38d35833e15415607df7814cb202 SHA-256: ab82508108b5e3fbdaf2e51cef5309014e0109710b731aec7ba7f67190c61e23
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 link points directly to executable/archive payload critical PDF_DIRECT_PAYLOAD_LINK
    PDF contains a clickable HTTP(S) URI whose path ends in an executable, script, shortcut, disk image, or archive extension. Documents can legitimately link to installers, so this is a high-risk delivery indicator rather than a standalone exploit fingerprint.
  • 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://druttle.ru/wix?keyword=return+man+3+espn.com In PDF document text
    • https://cdn-cms.f-static.net/uploads/4444853/normal_5fe9ef99eeeb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426944/normal_6022d1ed6f40a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465394/normal_601cdf3f1fa73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384155/normal_5fc7ed8d4ce23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465123/normal_5fdad36c198a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366632/normal_5fede09fad96e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417414/normal_601a2fc4d9da3.pdfIn PDF document text
    • http://winoorama.space/mogudipovevukowoxaxuln5vj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470222/normal_5ff5337c7fbbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405193/normal_5fd6771bb638d.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/gezejoputiwinu/25386556916.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/comment_communiquer_avec_ses_guides.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/amreli_steels_limited_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/70227696523.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/94765782902.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_off0000c6e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E8 5252 bytes
SHA-256: 6e4a6dc4a97da3728eca23026030770fa8d93889c419642cf6196fe9b4bd6665
font_01_sfnt_off0000d8b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B1 10160 bytes
SHA-256: 11c371a9b16d7fb51a2b903101bbe39477524217205a9c998a4d57ba39d59233