Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8d3094df5a1e436…

MALICIOUS

PDF

76.2 KB Created: 2021-05-18 04:58:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 3948a3b59365375fc60c8077594efb1b SHA-1: 5562cf5120f6586b2e2bb88b008a9a2279851ff5 SHA-256: b8d3094df5a1e436c2e3bde5882129e646ff5cd52bf05ecfc7a215d1a8e8b5da
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, https://leonvi.ru/strik?utm_term=dmx+wife+instagram, is the primary indicator of compromise, likely leading to a phishing or malware distribution site. Although no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit vulnerabilities or trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/strik?utm_term=dmx+wife+instagram PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368237/normal_5ff4be15240fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413374/normal_6027cb7d1ab85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408711/normal_5fd6657bdd76b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_6021746915492.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380863/normal_60184cbaa26ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417643/normal_60420b705a658.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425919/normal_5fcf17bad4b94.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bosadubarelazu.rf.gd/3493873419.pdfIn PDF document text
    • http://nawatelobuj.rf.gd/31659959871.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/how_to_clean_my_keurig_2.0_needle.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/anaconda_for_windows_32_bit.pdfIn PDF document text
    • http://kolenexe.epizy.com/tamil_nadu_land_guideline_value_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/drupal_7_theme_template_names.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/56858516597.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/ancient_mariner_crossword_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/lights_out_windows_home_server_2011_download.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_off0000e9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C4 5216 bytes
SHA-256: 3a23d49e1613d30a5a488673773ba4ce5d67b5b6a29981d0bf629b7dca0cf0f8
font_01_sfnt_off0000fb8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8C 11976 bytes
SHA-256: 1b586a341a83483d6ca036cf466fcbe40a63ef57344f337daf871bcb768d7b89

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