Malicious PDF — malware analysis report

Static analysis result for SHA-256 d592e3469d428d1a…

MALICIOUS

PDF

67.7 KB Created: 2020-11-09 17:44:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b0dc85b8bd6d48eddc3591d9ce8c9ea0 SHA-1: d3b7489b690aa7aa65b6fd5fefe79f0d9ea2d50b SHA-256: d592e3469d428d1a4ae7ad8fbe50a5da019e915c21b5b56b477fc47bc970bd2f
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-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://cctraff.ru/strik?keyword=ib+art+process+portfolio+examples In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381347/normal_5f93d6cc13356.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377678/normal_5f8be373e578e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366973/normal_5f99d2df1bc10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381980/normal_5f9d903ad116e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393036/normal_5f90b8d95b65d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368488/normal_5f8c3c11208b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455659/normal_5fa9076ec5ac6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385415/normal_5f9f8236ccdb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380084/normal_5f8f51f2c01aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381321/normal_5fa40843852d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382430/normal_5f8b48c79b84a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390643/normal_5f9d0edb119dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426556/normal_5fa266f67b714.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/lixuduwonifa/blue_mage_spells_ffta.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/go_math_grade_4_chapter_4_review_test.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_off0000cc7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7E 5308 bytes
SHA-256: ff500e7bc5423dff036284d3b7c2055f909e7eac13fb3c24f8061cc18391ddf2
font_01_sfnt_off0000de7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7A 10456 bytes
SHA-256: fa6a0b32b8b55fdb263e42499704fd76bcc873fbcd9da9add1810b355c57f6e8

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