Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e4b50533e4b89b8…

MALICIOUS

PDF

67.5 KB Created: 2021-02-20 01:48:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a819fe00b471a0ca21d14696ad47cedc SHA-1: e766f225df70439898bbd7ea966a5753f6e56743 SHA-256: 0e4b50533e4b89b865a017d77ebf87e0dee4dc761c0c71583e05f04c54770f9a
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, with a high risk score. It contains an embedded URI pointing to 'bologen.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://bologen.ru/strik?utm_term=how+to+get+rid+of+a+salt+bridge+in+a+water+softener PDF link annotation
    • https://cdn.sqhk.co/nuroteditu/pibUgd0/heart_valve_problems_signs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409819/normal_602a42101f988.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414696/normal_5fe4d8b79a20f.pdfIn PDF document text
    • http://kyukty68.xyz/concepto_de_sociedad_segun_autoresaqfyc.pdfIn PDF document text
    • http://netewe8.xyz/how_to_calculate_density_given_temp_and_pressureckg4l.pdfIn PDF document text
    • https://cdn.sqhk.co/rezejigobip/fFjfyha/79693902288.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368756/normal_5fdff16058a81.pdfIn PDF document text
    • http://gratoraama.space/75438812511hc7qy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://busugotuwege.epizy.com/84626183325.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_off0000cc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC6D 5268 bytes
SHA-256: e03d7caf02192c33d93fc19aaa244584d0c43187559fce6918acd5779e3f1fc4
font_01_sfnt_off0000de7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7A 10192 bytes
SHA-256: 1a5ff50f1885a41c423712a1cca66c2ea39a5d241a92a5c7d2a1b6fc721adce1

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