Malicious PDF — malware analysis report

Static analysis result for SHA-256 c03a31b7564947a3…

MALICIOUS

PDF

80.3 KB Created: 2021-02-24 05:59:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0bb18004b13f9c805a886cdca9e4ee6e SHA-1: 817d25a80ac3adfd26d96a407944527d6cc29d9e SHA-256: c03a31b7564947a3e14f9dbd6f30c436edf8cba61221fc9592a7df107e8fd4f7
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although the document body is heavily obfuscated, the presence of a malicious URL is a high-confidence indicator of an attack.

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
  • 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://crophysi.ru/strik?utm_term=unidades+de+medida+y+equivalencias+del+sistema+ingles In PDF document text
    • https://cdn-cms.f-static.net/uploads/4458824/normal_602df465828be.pdfIn PDF document text
    • https://vojimefijizudi.weebly.com/uploads/1/3/4/3/134310580/zeverudikivesupodasa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417523/normal_5fec5b6520237.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388067/normal_5fe309378a446.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369149/normal_5ff82d225559d.pdfIn PDF document text
    • https://ropugobefele.weebly.com/uploads/1/3/4/4/134445072/ragutokejetuzo.pdfIn PDF document text
    • https://lupabarudu.weebly.com/uploads/1/3/1/3/131398308/mowixevuzefarilafo.pdfIn PDF document text
    • http://loxesitigogu.iblogger.org/wugowumopidupidopuderemuj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412896/normal_5ff5793e21763.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luwegovufa.epizy.com/metformin_dosage_pcos_treatment.pdfIn PDF document text
    • http://wubazinosimisod.rf.gd/hungry_shark_apk.pdfIn PDF document text
    • http://jovukanuwu.rf.gd/which_club_would_a_golfer_use_to_tee_off.pdfIn PDF document text
    • http://gevitejivojo.rf.gd/kavotozevasarobul.pdfIn PDF document text
    • http://pezomovororiz.rf.gd/men_s_health_fall_fashion_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/xujexume.pdfIn PDF document text
    • http://wabelat.epizy.com/tugusexegerofajixidi.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/bicuspid_aortic_valve_aneurysm_guidelines.pdfIn PDF document text
    • http://lopejad.epizy.com/59342871244.pdfIn PDF document text
    • http://josetevuj.epizy.com/us_highway_41_traffic_report.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_off0000f71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71C 5444 bytes
SHA-256: 2330873e23154bcc027a5f46d251db691f39b8b69eebedbc65682780a86b426b
font_01_sfnt_off00010999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10999 12892 bytes
SHA-256: efb682ba02e40256d39879b04c19aec8042c264780f058cf95c37a267dc7d390

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