Malicious PDF — malware analysis report

Static analysis result for SHA-256 786441e2155fe544…

MALICIOUS

PDF

66.6 KB Created: 2020-11-10 08:58:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 28f1b32cdf6e1131c3048f5f8ed43cff SHA-1: cfc0a902856087d54cc1fce6c74a372f1792d0bd SHA-256: 786441e2155fe5441f775931313384d1f7f6ded160b5d12169e43fbda4acd519
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://gettraff.ru/123?keyword=myanmar+books+free+download+sites In PDF document text
    • https://tubumafipe.weebly.com/uploads/1/3/4/4/134458357/ponipesenati.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371536/normal_5f8e3ed58e3bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488141/normal_5fa9258a8a937.pdfIn PDF document text
    • https://ruxikejogotiwo.weebly.com/uploads/1/3/4/5/134576655/soviparedesopivipoxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f86f55149c0b.pdfIn PDF document text
    • https://faxipanonuk.weebly.com/uploads/1/3/4/3/134352952/nilubodeg.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/zuses/6191009349.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/pepibuvoferifopejenogi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b89d6fc7-cfde-4509-92fe-d0d4b131830b/80654747211.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55b1abf1-3fed-45c4-82fc-79b5bd6f2ed7/kiletu.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/77832751462.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_off0000c694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC694 5456 bytes
SHA-256: 6cbc0192eb262019ebcdb6449e700388e368045302a6e6868bb1b6ce02e87d3a
font_01_sfnt_off0000d92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92B 10720 bytes
SHA-256: 88c1f9200723e67e3a1e274ffde858684574bca11a3fa7dd0c112c1542dac087

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