Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e7073a13dd8f3b2…

MALICIOUS

PDF

67.5 KB Created: 2020-11-25 16:42:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: c380628e34ef50d604d8e87e16c4e7d7 SHA-1: 234d711c3fd3d82d6bfe2ad81549c55f2979ba65 SHA-256: 4e7073a13dd8f3b2ff0b5ce4f63b1b35405f8d40409a456e664325554f1ac39f
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 0.9998

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://cctraff.ru/123?utm_term=raimunda+volver+character+analysis In PDF document text
    • https://cdn-cms.f-static.net/uploads/4427085/normal_5f9a817dd9467.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408460/normal_5f925abdeb851.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378157/normal_5f8f8a2eb646f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401711/normal_5fbb74438eb95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500200/normal_5fae6f3a7b043.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450251/normal_5fa1fe7233137.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375503/normal_5f8dc87315160.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443371/normal_5fa8cb6583a66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369525/normal_5f954ad123580.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369514/normal_5fa474ba2a132.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427079/normal_5f9874f18cb9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379473/normal_5fb84a3059a95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401723/normal_5f94a8e5a168b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405945/normal_5f934e8053d55.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/kavitokolezub/filoba.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_off0000c79f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC79F 5348 bytes
SHA-256: 8ea360d276ef1c73b0b524b743e0f67dacffa0bde996de9861c4bf60070f64ea
font_01_sfnt_off0000d9b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B3 11540 bytes
SHA-256: 68e6e3f125e729eaac03877e4d4d8c264ac8722bcfef592f140c6426febab70a

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