Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9fce80fd9b514fd…

MALICIOUS

PDF

76.5 KB Created: 2021-01-31 21:20:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b91d4e0fb9034c8158f255c71fb5cb54 SHA-1: 174c2d3db518ea3ce05de2c7c4337f2c28c93f9b SHA-256: e9fce80fd9b514fd4283dabd6e54375046472872311a651ffb9245aa377ce553
194 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
  • 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/aws?utm_term=make+my+own+preschool+worksheets In PDF document text
    • https://cdn.sqhk.co/jesarijufe/dxggjhy/khloe_kardashian_old_photos.pdfIn PDF document text
    • https://cdn.sqhk.co/merodobiweve/igfJjdx/66320929941.pdfIn PDF document text
    • https://cdn.sqhk.co/gabisolovima/id5gjq3/clueless_cast_now.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/g3rYcgc/kopasevit.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/kovilowab/povutanojev.pdfIn PDF document text
    • http://lidiwerefibe.rf.gd/levorexafase.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/wanedekivuzewalite.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/information_technology_support_specialist_interview_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/design_patterns_in_java_tutorialspoint.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/30956670496.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/android_platform_tools_xda.pdfIn PDF document text
    • http://mawekipabotore.epizy.com/cheeni_kum_full_movie_720p_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/electronic_circuits_2_important_questions_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/34660276026.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/30263641484.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_off0000ee3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3A 5436 bytes
SHA-256: 775f6793471c5762be60ad8281cab701edad7790b2604b5aaf739f55b75acd55
font_01_sfnt_off000100b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B2 10688 bytes
SHA-256: 3347f2bcbd69cd18074ddab99518b60a6f9ff4b871e3a3aefe369511c4f50c89