Malicious PDF — malware analysis report

Static analysis result for SHA-256 eecb3cc7727177d5…

MALICIOUS

PDF

66.7 KB Created: 2020-12-16 15:30:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1044381988b95f2efac1b86fbad204f1 SHA-1: 75dbe3feb0551fc6e24872c7b5b5a383fa5e2203 SHA-256: eecb3cc7727177d5726bb9dd50c542a4ad5a932214eb5822c81710a7bc098487
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffine.ru/123?utm_term=st+vincent+hospital+worcester'. This indicates the document's primary purpose is to lure the user to this malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for a phishing or malware distribution attack pattern.

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://traffine.ru/123?utm_term=st+vincent+hospital+worcester In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384164/normal_5fd2432e8396a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366348/normal_5f9b27390f40f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476758/normal_5fbe2e8a21ded.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480149/normal_5fbc8fdf4a517.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414166/normal_5fb3b68267a09.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc4e10e2e34347c705dc52c/t/5fc5be89e18c5c478ec24701/1606794890195/molunakixubakolevajirab.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2ef221452f90b7ff27d3c/t/5fc4b85f61e25426e1cd0eba/1606727775435/98407392965.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc37032d26ff1194f83f2a8/t/5fc9cb6b87b36f46d4fffcf5/1607060331815/traffic_accident_townsville_today.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcebc33eb0bb74023f8d0ec/t/5fd1e194d97b572b89dc7c90/1607590292405/50445722216.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f319ab79f442f229e2d8/t/5fc173949d79364840c45e3d/1606513557066/lexington_ky_pva.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/kakugogesogor.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc51b762e537a05ef2436ee/t/5fcbca1ea51c5a1401b327bf/1607191070609/necromancer_build_divinity_2.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_off0000ca22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA22 5276 bytes
SHA-256: 5e92af252fddb0cd9f9e08d2ad1924ae04a5386bc5adb08caa1e38064c2aaa51
font_01_sfnt_off0000dc23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC23 10076 bytes
SHA-256: 9f67cfdebef4ba6df155d873a9f13587792d3b84ac773993bedea8d91acd9416

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