Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ea0d535c07f21d…

MALICIOUS

PDF

70.4 KB Created: 2021-02-21 21:37:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: de355d071e8fe03e1b097350a29055a4 SHA-1: de4a021ae4e6f1729f1b998d5b1397fdc6a1df22 SHA-256: c7ea0d535c07f21d80d995f96fd74ce46ca9e1a135034f286861aaedfd0f03d6
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wix?keyword=emotional+first+aid+t%25C3%25BCrk%25C3%25A7e+pdf PDF link annotation
    • http://kenufapozij.22web.org/35813424659.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386073/normal_5fd9aebcf1ddd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416939/normal_5fd1c8cac4ed2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392871/normal_5ffa5fc1d9c1b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454056/normal_5ff90115b7008.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386361/normal_5fd31fbe2df84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387920/normal_5fd615112607f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490523/normal_5ff475505a32a.pdfIn PDF document text
    • http://zemimumaloger.iblogger.org/akuntansi_dasar_kelas_10_kurikulum_2013.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495390/normal_5ff89e7f306ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486053/normal_5fcaee5ac3a8a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wexotorat.rf.gd/let_go_past_participle_form.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/ti_nspire_cx_cas_2_games.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/patterns_of_enterprise_application_architecture_filetype.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/inguinal_hernia_surgery_guidelines.pdfIn PDF document text
    • http://ramapenutizawa.epizy.com/14922205103.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/80942700545.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/daxuxovunotefazasikowem.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_off0000d53f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53F 5508 bytes
SHA-256: 33f516a38c17e3cd407940cf7b9dc80c81358926a5a881c3d023d2f850cfd9f7
font_01_sfnt_off0000e7af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AF 10436 bytes
SHA-256: 5d19f3ec66a288203bae3d36056f60c7d2c6a79e36108ced43ebc570c96d7060