Malicious PDF — malware analysis report

Static analysis result for SHA-256 e817e0cef0094fe5…

MALICIOUS

PDF

68.7 KB Created: 2021-01-25 08:24:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 61e84d01bcc4b72602d96bcfcdab92f8 SHA-1: 0cbd69a3271445807f5e94bb1836f5a838825b14 SHA-256: e817e0cef0094fe57ecc21f9e4df2ff08999d59433f10250da09a8af6d0cdad4
154 Risk Score

Malware Insights

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

The file is a PDF containing a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic and ClamAV detection. The ML classifier also strongly flagged this PDF as malicious. The embedded URL likely serves as the primary attack vector, directing users to a malicious site for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://traffmen.ru/wb?keyword=snapchat%20logo%20png%20black%20and%20white In PDF document text
    • https://static.s123-cdn-static.com/uploads/4450147/normal_5ff311d42ba5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455183/normal_5ff017c939e11.pdfIn PDF document text
    • http://dokanusivodob.22web.org/fusionner_2_adobe.pdfIn PDF document text
    • http://tetutunugu.iblogger.org/22318956524.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498893/normal_5fe4df4613a1f.pdfIn PDF document text
    • http://kosiwixiwumizu.iblogger.org/monemekadupube.pdfIn PDF document text
    • http://fofafik.iblogger.org/25343563851.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490250/normal_5ffa7ab682ca3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382423/normal_5fe714b4f1f93.pdfIn PDF document text
    • http://webimedokawuxun.iblogger.org/vaximif.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/jukoxisojow/jukazirabofulurokisov.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/waxakipovekega.pdfIn PDF document text
    • http://zifezerolivuba.epizy.com/xslt_template_match_not_working.pdfIn PDF document text
    • http://jonegukum.epizy.com/rixugusoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/cset_math_subtest_1_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/95376180198.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/anticoagulant_perioperative_guidelines.pdfIn PDF document text
    • http://jupanifoz.epizy.com/78240517580.pdfIn PDF document text
    • http://litufowanukoro.epizy.com/25358971241.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_off0000cef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF5 5460 bytes
SHA-256: 2c8e3837a2732d0e4300e0ac38d5acbc63caa9cd42b0046354d825f712930714
font_01_sfnt_off0000e190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE190 10628 bytes
SHA-256: 7bb079caacfc276f8ce610ce4e447b2bdebae831f8559ffbec273327a535fda9

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