Malicious PDF — malware analysis report

Static analysis result for SHA-256 4927046562cf1261…

MALICIOUS

PDF

60.8 KB Created: 2021-01-31 02:38:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: aff5cc6bb08853b66e6832a76a7e34ef SHA-1: b3ee84497f2773bfe660af79bf7586c09c90e919 SHA-256: 4927046562cf1261abed467f5098513e4928217a9af3aae07cfe17609113194a
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support this assessment. Although no scripts were explicitly extracted, the PDF structure and embedded URL suggest an attempt to redirect the user to a malicious site, likely for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crophysi.ru/123?utm_term=alabama+tennis+association In PDF document text
    • https://static.s123-cdn-static.com/uploads/4385004/normal_5fe25e79c87ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471082/normal_5ff45fa04bfe9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455881/normal_5ffbb396c0e84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377679/normal_5fd18a831c307.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368768/normal_5ffebada87b7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447669/normal_6011ef47955c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450512/normal_5fd3953324aaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388065/normal_5ff612cbc2d10.pdfIn PDF document text
    • http://memaviwebepa.22web.org/bewars_movie_video_songs_hd.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/toguvaju/nezujoputusabejes.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/demographic_data_questionnaire_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/funny_jokes_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/rikejowapovofobifalov.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/adobe_brackets_for_pc.pdfIn PDF document text
    • http://gujugune.rf.gd/21132735458.pdfIn PDF document text
    • http://xugigizipir.epizy.com/leckie_and_leckie_student_book_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/zevexobexakule.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_off0000b5e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5E1 4980 bytes
SHA-256: ac039cb88054694a302db8ec1b1ef77008e13c24f77de8191c9e2c2592f9a510
font_01_sfnt_off0000c6be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6BE 9312 bytes
SHA-256: 6e46a88885d705eed72f8cce8d9b621741c419afc5812ef7a3482ba43b9ce48f

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