Malicious PDF — malware analysis report

Static analysis result for SHA-256 2efbb2d2869243f0…

MALICIOUS

PDF

66.3 KB Created: 2021-02-13 23:54:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: cf29d60968e1e706c40860b9fc1a5c70 SHA-1: e0eff601a5a94838ae227d934b3254c7a85d2328 SHA-256: 2efbb2d2869243f0ec1e2de43e51dfde799d6b6c59dbed993cb4ef16d95b4bf2
136 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
  • 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://jacksth.ru/wb?keyword=eres%20tu%20maria%20answer%20key%20episode%202 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375896/normal_60055e669451f.pdfIn PDF document text
    • http://perevod-card2card24.site/nobsound_ns-08e_manualide5s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475582/normal_600e0c2faa6b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372373/normal_5fe446ffa88a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494663/normal_5fdbdf5dee5f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477376/normal_5fc64a494d23c.pdfIn PDF document text
    • http://apsmall.space/9068689634m2yfv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5fd818aaad04e.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/Hha6Xhg/xolaturumatalivamo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408601/normal_5fd038ed5fd6d.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/zalisujezajaje/storleksguide_lager_157_barn.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/gesubu.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/81046728291.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/consumer_reports_vacuum_canister.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/cake_mania_app.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_off0000c3de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3DE 5420 bytes
SHA-256: 095b07b7c1849b8c3bbe79b0498314a81a032a1ec75956b7f7265acdbfb95358
font_01_sfnt_off0000d655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD655 11652 bytes
SHA-256: 2280135801cef3d75f49b5c50da537b2a2f877e39598869290111c4c89bbd349