Malicious PDF — malware analysis report

Static analysis result for SHA-256 d42ecfef36378efa…

MALICIOUS

PDF

78.3 KB Created: 2021-02-23 11:52:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: c06feb9fb6e36d6337f834a4f137dc22 SHA-1: 306a346e2fa7d129eb38357a03934771da45631e SHA-256: d42ecfef36378efa00fd55216cbd741ac5bf72df9c65b0e9e44896bf6cf52259
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 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://yafferge.ru/123?utm_term=roomba+870+review In PDF document text
    • https://cdn.sqhk.co/gapalagabig/fBzy8ZJ/pojuzerifuditoxogenizon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385862/normal_6030e03ee808a.pdfIn PDF document text
    • https://cdn.sqhk.co/numexerab/aicoJXr/color_maze_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405184/normal_5ff347e6a9078.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457848/normal_5fecf0f62db45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406202/normal_5fdc6951cfe16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414849/normal_5fd1a84f44b94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365626/normal_5ff38202d349c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447497/normal_5febda75888a8.pdfIn PDF document text
    • https://cdn.sqhk.co/goronikel/URjihdk/togus.pdfIn PDF document text
    • https://cdn.sqhk.co/figegixo/hbIgiie/juventus_vs_sampdoria.pdfIn PDF document text
    • https://cdn.sqhk.co/mibaforetu/fFODkjg/jinut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425908/normal_5fd1640dc770d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422906/normal_6017c6965b0c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fipotunisobojow.epizy.com/nefolanutij.pdfIn PDF document text
    • http://fegugeg.rf.gd/potubaparijovogen.pdfIn PDF document text
    • http://sowawobajomo.rf.gd/23468454252.pdfIn PDF document text
    • http://pakurowomeki.rf.gd/organizational_transitions_managing_complex_change.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_off0000f3dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DD 5336 bytes
SHA-256: c36fdd569ef43e034c59fcacc417c073d58cb7df1410846b5a51b1859585ee2f
font_01_sfnt_off00010603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10603 11328 bytes
SHA-256: 04c0331699254521132cb5f5f41e36461043c1832196c5248304f2ba70bb7649