Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b936248ec872ad4…

MALICIOUS

PDF

70.5 KB Created: 2020-12-18 18:49:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 33035353d4ea10132b6b3a3b413262d6 SHA-1: 35f8814752e16c7afd571bfa8429eaf2c968f7a6 SHA-256: 9b936248ec872ad4b69966a0e70cd5eb2bd6ba6145ad58cbdbb9b48c05892964
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 0.9997

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://traffset.ru/strik?utm_term=words+into+math+poster PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368265/normal_5f8b20fbd4ac5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5fbbb7cca1229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412183/normal_5fa585264a7f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465133/normal_5fd93b0f9915d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377935/normal_5f948cadb378e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463807/normal_5fd6524e86892.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455375/normal_5fba2d88129c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387938/normal_5f92c7b78279b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427282/normal_5fd0940b58b97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405194/normal_5fdc130ed7d68.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/babetafaperaxov/xemadimokimenisojapoles.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd03d172f8b574a0f4559e/1606222801476/craftsman_3_ton_floor_jack_parts.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc17ddbf9866f3fd2d885d9/t/5fc3bea73570fb44d1755e61/1606663847752/71775808671.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_off0000d716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD716 5180 bytes
SHA-256: a5c0836bbaf76429dd1188a2d24cb6b8a465b55586c23c653e2cac6d79f1ddcc
font_01_sfnt_off0000e891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE891 10956 bytes
SHA-256: abf6474dc774c3243df740b2b346e3e5b77f4d092baeea3b4b61e7438673d901