Malicious PDF — malware analysis report

Static analysis result for SHA-256 01be9bdb883eed1a…

MALICIOUS

PDF

82.7 KB Created: 2020-12-02 23:36:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: bf8bb3a90262180850f2264ec095cff7 SHA-1: c3044c921e997662780acb58389da68b89952b5d SHA-256: 01be9bdb883eed1af897cdecce26dd23e7b99c39f5ce11ade1ef1742fe17e6c6
214 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, indicating it is a phishing or redirector attempt. It contains a large number of embedded links, including a known malicious redirector at "https://cctraff.ru/aws?utm_term=bass+guitar+guide+for+beginners+pdf", designed to lead users to potentially harmful websites. The document body, though heavily obfuscated, appears to be a lure related to a beginner's guide to bass guitar.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/aws?utm_term=bass+guitar+guide+for+beginners+pdf In PDF document text
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/14c69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403128/normal_5fb2bc31dff17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418557/normal_5f9b787ef0c50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403947/normal_5fb875b0da750.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366048/normal_5f8f6b203509c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381102/normal_5f90e60128b65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486535/normal_5fbbcec8e41e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482406/normal_5fc1fd5ee6c37.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/dazovosugev/3rd_grade_tally_chart_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6942a047-2754-4da0-922b-f2f293707782/tipos_de_cuestionarios.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_off0001076d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076D 5368 bytes
SHA-256: 539bd506ba5bfbb9db2f264a3f85f3fbf3967b8a9f56731d7be6839b63bc1e20
font_01_sfnt_off000119ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BA 10616 bytes
SHA-256: 79a36952d7650d1a75a03cde8e22f7a4ed6d85ac85e71de3c7ce8535f68115de

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