Malicious PDF — malware analysis report

Static analysis result for SHA-256 b019b1f1c92f3dc5…

MALICIOUS

PDF

68.2 KB Created: 2020-12-04 23:51:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 02df51097c682cfc6881dce84ea4d157 SHA-1: 02f46cf85721badd9c7e80270c8799cc789a0984 SHA-256: b019b1f1c92f3dc557bf893133139768d36cf5f4aac40bb0e1ebc8d4f5cb5d4b
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with several pointing to known malicious redirector infrastructure or link farms designed to host further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure suggests a malicious redirector pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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?utm_term=sangean+ats+909x In PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/mixabokika-xanadujane.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388050/normal_5f99edd60ed6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368224/normal_5f8938efd711b.pdfIn PDF document text
    • https://rofexigu.weebly.com/uploads/1/3/0/7/130738805/kukajobo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415543/normal_5fbfa27027a85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487187/normal_5fbf1e013ec79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372702/normal_5fc2fdef84bdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385421/normal_5fa8878c6be72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421051/normal_5f99209b0d87a.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/felasorarabipis/gidubov.pdfIn PDF document text
    • https://s3.amazonaws.com/juxatop/43913597130.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfdb415687f52b6b7b2913/t/5fc0edab9b1ed03538fd2dd1/1606479275792/introductory_circuit_analysis_13th_edition_solution_manual.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_off0000cd66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD66 5196 bytes
SHA-256: 6a8ea8c7a9461ef6fd73692ae8908a232042b4707d4f71019bc9187ec213b404
font_01_sfnt_off0000df22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF22 10932 bytes
SHA-256: f4bf33859038f9cdf223f0009897d759825f1a9f0e4ea122892e7c258f1c0a58

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