Malicious PDF — malware analysis report

Static analysis result for SHA-256 69bea5e9ae06a42f…

MALICIOUS

PDF

96.5 KB Created: 2021-03-02 12:44:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ea311991737dbc43a76058f019006404 SHA-1: 52aa440061e95f95e78c516381c801533a86fa9b SHA-256: 69bea5e9ae06a42f9a4e126fefe21b1b9b9567dd1750c5521ad778b6460cb2f5
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with at least one pointing to a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text that may be intended as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://baarspo.ru/strik?utm_term=sistema+endocrino+funcion PDF link annotation
    • http://teachersaid.fun/lowibewabowotidetilokonop0ct.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449185/normal_6001d99527ec4.pdfIn PDF document text
    • http://donenebexoxisik.22web.org/amoxicilina_clavulanato_500_bula.pdfIn PDF document text
    • http://reactivascotia2020.com/ropunw69bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450336/normal_5fe18eb296281.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/elkay_drinking_fountain_service_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490936/normal_5fe89e8dc6a74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470218/normal_5fe4bcb83bdee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472221/normal_5fecd01656315.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jodonurinifos.epizy.com/fotawofabut.pdfIn PDF document text
    • http://xonumubik.rf.gd/23164602251.pdfIn PDF document text
    • http://pexapoxulimexu.epizy.com/25026756554.pdfIn PDF document text
    • http://pafovipazatuk.rf.gd/70663209897.pdfIn PDF document text
    • http://sivikonalijuto.myartsonline.com/thinking_fast_and_slow_chapter_summary.pdfIn PDF document text
    • http://pirajog.epizy.com/44163461511.pdfIn PDF document text
    • http://pozaberu.rf.gd/90792380037.pdfIn PDF document text
    • http://xobiluwova.epizy.com/juniper_srx340_configuration_guide.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_off000139e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139E9 5236 bytes
SHA-256: 7ffc690186a4cd0159beb85a85865b1e07901783e98637e87bf5d191980c230e
font_01_sfnt_off00014b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B9D 12320 bytes
SHA-256: de063ff0ddf3a41eb1c427cab6b8d993eac7b47b99007126073f64ef21c9bc19

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