Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab670a30d7a5635a…

MALICIOUS

PDF

37.9 KB Created: 2020-10-02 20:40:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b0805eda4dccefa1ef5b970d92098537 SHA-1: 98cf1472d41f8a7759832b8c84f1652005786ad5 SHA-256: ab670a30d7a5635a14a32e66a2a1423d346b2597eccc47dc67c91ec215b127fb
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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://cctraff.ru/strik?keyword=x+rocker+gaming+chair+instructions In PDF document text
    • https://site-1040794.mozfiles.com/files/1040794/kupekaleju.pdfIn PDF document text
    • https://site-1038772.mozfiles.com/files/1038772/nidomofum.pdfIn PDF document text
    • https://site-1036879.mozfiles.com/files/1036879/losatig.pdfIn PDF document text
    • http://files.coachingwithdonnacoles.com/uploads/1/3/1/4/131437626/firabokamopuv.pdfIn PDF document text
    • http://kapeked.gaiabamman.com/uploads/1/3/0/8/130814328/sediwexir.pdfIn PDF document text
    • https://site-1040134.mozfiles.com/files/1040134/sewopilesijalerumeze.pdfIn PDF document text
    • https://site-1037221.mozfiles.com/files/1037221/97027985428.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a75bb208-642e-49ed-93fa-953fe500f7f5/mamesutemajamovamabalaz.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_off0000579c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x579C 5224 bytes
SHA-256: bf9a13becd953639b8ac228b76a8fc2a54fd42358275a3af470290f6252c57b6
font_01_sfnt_off00006934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6934 10008 bytes
SHA-256: f73bc8298f0cd350b36323b5fbbbe130926f75215404ea6f2a9ed950c81002ed