Malicious PDF — malware analysis report

Static analysis result for SHA-256 477b54445231642a…

MALICIOUS

PDF

77.8 KB Created: 2020-11-23 13:49:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f3055c077ae1b77767dc0b020a495d16 SHA-1: 175323b6c520137e8b633056fd46deb54d2b1bbe SHA-256: 477b54445231642a105c06571719a06db61cada1dec47c950d5e50d888df31d4
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/strik?utm_term=lover+awakened+read+online In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421957/normal_5fade86a62045.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478687/normal_5fab5094ea84e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373749/normal_5f986954523d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374840/normal_5f94a1a35cca0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376362/normal_5f9d47aa8c48e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383800/normal_5f9016761db4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369185/normal_5fb49a714f7cd.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/henghuili-files/filexefugatit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d86c7ff-5032-4a5b-8920-3e61b6492f48/estrategias_definicion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/417417f3-fc97-4a30-a297-afb2ab9228fe/74625575254.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_off0000f604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF604 4796 bytes
SHA-256: b53147e72fdb0ff3b7f2b922adb4f9c0f92a68f0648db6b366b889d83450b556
font_01_sfnt_off0001067c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067C 10732 bytes
SHA-256: 1ccb56d00c034161d881227469771bdc0ec18113175e8db46fff0731f6ea7dbe