Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec0a3f753a598cf8…

MALICIOUS

PDF

58.5 KB Created: 2020-11-09 18:05:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ee29a1723b37775fa84a66cc40f9fc92 SHA-1: 25a77046194d9ee2a01f3253b8b15c353266ca9b SHA-256: ec0a3f753a598cf83fe280d73e4a6ce0d566224d69cad61ea6be981e00f76c3d
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9981

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://gettraff.ru/aws?keyword=osrs+ironman+money+making+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393637/normal_5f97d78a2d9fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371005/normal_5f8e6c6e1e14e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411481/normal_5fa49b5b801f1.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/8091658184.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/55799577601.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/porter_cable_bn125a_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/oion_technologies_lb-444.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/rajofisorimumugitivanasix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/862f4283-cd52-47d6-80e9-6fd939890bb9/49103004598.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_off0000aae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAE7 5308 bytes
SHA-256: f170806a03634dd1cae67f2d6bbf4940500ba5abb5359643dd1a02a8d4a9ef9c
font_01_sfnt_off0000bcdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCDF 9596 bytes
SHA-256: f0d27c6baa6d82d3edb959360d0fa08013a11b247942396874357fc583ef191d

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