Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ae49507f9355044…

MALICIOUS

PDF

64.3 KB Created: 2020-11-23 15:00:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c59e83458bd400d1a5511a551e2165e6 SHA-1: 1335e88214d498851d5a2c2cba6593b9d670d958 SHA-256: 5ae49507f93550440d4efd32e8ae816542d2b9ab57c92064a4ff73f2aec01750
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the presence of numerous links suggests an attempt to direct users to potentially harmful external sites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gettraff.ru/123?utm_term=bose+acoustimass+300+subwoofer In PDF document text
    • https://vajibenutiw.weebly.com/uploads/1/3/4/4/134487234/tuxuzijizi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476930/normal_5fb350dd1ce18.pdfIn PDF document text
    • https://xitukuwelup.weebly.com/uploads/1/3/4/3/134340625/gipij.pdfIn PDF document text
    • https://nusavudusegi.weebly.com/uploads/1/3/4/4/134444144/2553451.pdfIn PDF document text
    • https://guliwomijura.weebly.com/uploads/1/3/4/8/134846957/6727958.pdfIn PDF document text
    • https://befekibeje.weebly.com/uploads/1/3/4/3/134319248/lelidosikufedema.pdfIn PDF document text
    • https://namokokesovu.weebly.com/uploads/1/3/4/4/134480524/6792133.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501632/normal_5fba514945c4f.pdfIn PDF document text
    • https://pinoxelu.weebly.com/uploads/1/3/4/1/134108818/5315282.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/bibejovixapis/pdf_novel_ceros_dan_batozar_tere_liye.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/aviculture_traditionnelle_amliore.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/mailchimp_form_builder_gdpr.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/arbitration_act_malaysia.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/29669214907.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/razapakipube.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/fomivanug.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_off0000be0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE0D 5584 bytes
SHA-256: 0d8e95714ec0ceb59ac10c8192f9d3c90250356ed9887fe792d775a3e1381177
font_01_sfnt_off0000d106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD106 10540 bytes
SHA-256: ccac929f4c4c52b5f9e8d733948902a73fe33e004de953dc16d7b8b5832217b7

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