Malicious PDF — malware analysis report

Static analysis result for SHA-256 55dccf74a6c9cae2…

MALICIOUS

PDF

82.5 KB Created: 2021-02-15 14:46:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b7e59ca32819c878ea1197e5400c278a SHA-1: 5b4e4b5cca2d06acf8d5f9c01950a6a11c1aed06 SHA-256: 55dccf74a6c9cae274dc689f062e57a729839d0cccacbc0dd6b1b220c6388ba4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=les+mis%25C3%25A9rables+2012+age+rating PDF link annotation
    • http://onlinekartiadesi.com/skype_for_business_server_2015_trialgcd9a.pdfIn PDF document text
    • http://grigolia-studio.ru/aaa_defensive_driving_course_answers15m0a.pdfIn PDF document text
    • http://sell-toclick.online/pruebas_psicometricas_gratis_para_im9h5wj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447640/normal_5ff7e2a2934fc.pdfIn PDF document text
    • https://rilitovewub.weebly.com/uploads/1/3/4/0/134095842/xenelegijimimegij.pdfIn PDF document text
    • http://ilkertr.shop/refenagug4l0ks.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451754/normal_5fdfd3c6a667f.pdfIn PDF document text
    • http://nudistoff.club/bozodadwj92.pdfIn PDF document text
    • http://alkim.xyz/30209952440gryqy.pdfIn PDF document text
    • http://strapslap.online/51102193498yvjt8.pdfIn PDF document text
    • https://rurusoweloxefug.weebly.com/uploads/1/3/3/9/133989150/putavo.pdfIn PDF document text
    • http://copyrights-notices-helps.com/71948134564u8ltl.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/gedexim/bejosobikifezemojatofa.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/community_law_manual_new_zealand.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/argentina_official_visa_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/2447492225.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_off0000ffce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCE 5552 bytes
SHA-256: 72bac7beac9afbb4b6e8dd7ad29e1afa97b8d7da0e2d3f1e6a83828362dda657
font_01_sfnt_off0001125b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1125B 12952 bytes
SHA-256: 0b71234a9321b0e1fa73a29680936c0706f507aaddda9aac37f517bf9ed7be5f