Malicious PDF — malware analysis report

Static analysis result for SHA-256 d737229e98739be3…

MALICIOUS

PDF

72.9 KB Created: 2021-02-14 12:07:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 15c76aa719c82256c9ff1cdeae36b2a5 SHA-1: f2928b8f8a7348f34e00677475a93b820abd2e03 SHA-256: d737229e98739be30074e8ee811fdb1b6e3bc27fd57dd00d4377697e9c2b3bba
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://crophysi.ru/wix?keyword=essentials+of+chemical+reaction+engineering+2nd+edition+pdf+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4501204/normal_600f4e35e7182.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469863/normal_5fdb8483bb14f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428039/normal_60289321bed29.pdfIn PDF document text
    • https://cdn.sqhk.co/joxutedunik/EJBjdhf/hoenn_pokedex_serebii.pdfIn PDF document text
    • https://cdn.sqhk.co/pedajobu/1gdDajf/zejigivofuven.pdfIn PDF document text
    • https://cdn.sqhk.co/fogibadeku/0jhgcjj/maharshi_movie_ringtones_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/Vig8hjG/township_definition_government.pdfIn PDF document text
    • https://cdn.sqhk.co/nivabetaz/iVImd26/sotudowosokaborubuzaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416326/normal_602538998179f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499972/normal_5fccc9da6841f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zeraginijumeje.epizy.com/tetifafixadogewolo.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/how_to_perform_a_pareto_analysis.pdfIn PDF document text
    • http://pebulibupa.rf.gd/free_dashboard_templates_html_css.pdfIn PDF document text
    • http://miloritamuve.rf.gd/retainer_agreement_iccrc_template.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_off0000ddba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBA 5748 bytes
SHA-256: 0fe22f89c95ae3be4247ce558aa0914c5659d9bc99e34d9d4af93633efa38bf3
font_01_sfnt_off0000f13d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13D 10880 bytes
SHA-256: 918ba655f33e970c3930f87b6dcdcba8b1817fe4a8a1f0f77a0d3911040c91ea