Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4bd70628de550f4…

MALICIOUS

PDF

92.0 KB Created: 2021-03-20 19:44:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 07d28eb9e39f5b0065835cffab0f157a SHA-1: 58c604f99dfb4e41d3d7d80770ad40aa3643d480 SHA-256: c4bd70628de550f48ffd1b4c43b6c316523fe9205b5c9abb6c3a23849aade57c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to 'ponafet.ru', suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://ponafet.ru/wix?keyword=sebastian+nadal+bjj PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416675/normal_6014535ecede3.pdfIn PDF document text
    • http://xejepurefe.scienceontheweb.net/nuxamalavabati.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481684/normal_60248949a0f66.pdfIn PDF document text
    • https://guvoruba.weebly.com/uploads/1/3/4/7/134742814/dd8349f654ea9.pdfIn PDF document text
    • https://cdn.sqhk.co/wozovege/s5iiRib/47335081700.pdfIn PDF document text
    • https://jobexukutet.weebly.com/uploads/1/3/1/4/131452991/4805772.pdfIn PDF document text
    • http://fonabibexame.iblogger.org/josusovozekosovegevem.pdfIn PDF document text
    • https://cdn.sqhk.co/gozolijitow/Njfhggj/21047317380.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwonesi/ieEszhi/68562311097.pdfIn PDF document text
    • https://jeripakituwimug.weebly.com/uploads/1/3/2/6/132695489/9ecb75173510.pdfIn PDF document text
    • http://jakivuxevova.22web.org/domain_driven_design_eric_evans_portugues.pdfIn PDF document text
    • https://fovezifume.weebly.com/uploads/1/3/0/8/130874198/5defc485bacc.pdfIn PDF document text
    • https://daxosunusopudom.weebly.com/uploads/1/3/4/5/134510034/ec863.pdfIn PDF document text
    • https://cdn.sqhk.co/renosopezare/cphijfe/94726550170.pdfIn PDF document text
    • http://mazikopipovix.mywebcommunity.org/percy_jackson_first_book_online.pdfIn PDF document text
    • https://cdn.sqhk.co/morureju/eiihjhe/cartoon_video_maker_software_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nokafifebezazo.rf.gd/20293469136.pdfIn PDF document text
    • http://rujidafedisezu.atwebpages.com/why_does_my_polaris_280_run_on_its_side.pdfIn PDF document text
    • http://kipinoda.rf.gd/wotisifat.pdfIn PDF document text
    • http://nebojemesiwi.atwebpages.com/80527114711.pdfIn PDF document text
    • http://vibiwarufade.rf.gd/master_of_orion_2_race_traits.pdfIn PDF document text
    • http://fajazimigig.atwebpages.com/activities_worksheets_for_kindergarten.pdfIn PDF document text
    • http://lalavuzotijosi.epizy.com/adodc_in_vb_6._0.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_off00012639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12639 5044 bytes
SHA-256: 65d77d45e0b75ea2ebffc7ef144446c7537969765b76eedcfa578fca8e737713
font_01_sfnt_off0001376c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1376C 13816 bytes
SHA-256: 0f2cb38c9b1755c3a3464c82cbe5cdc59ae4d743afa5c854aeb5642893ae51dc

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