Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bdafa688d576d25…

MALICIOUS

PDF

63.2 KB Created: 2021-02-10 02:07:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6e188c15d6afe295e54a91b1de3c2ec9 SHA-1: 54223734b089942812667d16c0502c46fa598575 SHA-256: 8bdafa688d576d258c1dc2cf332f3b23dfe4e47e0c403f2cdbc25e99e1118fb9
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or malware distribution campaign. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the document is designed to redirect users to potentially harmful sites.

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://seumenha.ru/aws?utm_term=bushnell+pro+xe+manual PDF link annotation
    • http://rankingcoach-seo.com/lemakazazisidefalikekaja2ynun.pdfIn PDF document text
    • http://idealslimitalia-ufficiale.site/ff9_walkthrough_downloadnvw1n.pdfIn PDF document text
    • https://vidujari.weebly.com/uploads/1/3/4/8/134858315/3610409.pdfIn PDF document text
    • http://itasda.online/64587384323q6nan.pdfIn PDF document text
    • http://new-leggins.site/9591114177jcd41.pdfIn PDF document text
    • https://lajutiruwogow.weebly.com/uploads/1/3/4/5/134585316/gexoluke-vibewex.pdfIn PDF document text
    • https://xikunozazoteta.weebly.com/uploads/1/3/1/4/131453294/ripilavebunun.pdfIn PDF document text
    • http://tronreserve.online/liturgy_of_the_hours_guide_2017gxj3a.pdfIn PDF document text
    • http://shtancircul.site/bams_beyrek_hikayesiql7i7.pdfIn PDF document text
    • https://jafobepajimo.weebly.com/uploads/1/3/4/8/134881918/pudedisineliv.pdfIn PDF document text
    • http://spain50off.info/nifevuwekopavifigs0my9.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/zvCpheZ/tijisorivuvoz.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/watajive/watercolor_brush_photoshop.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/66519993461.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/kayle_top_s9_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_off0000bc16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC16 5176 bytes
SHA-256: 3c51453487cb9a0b2f0d9c3fc59148a9061c06c5e2dae334a0cf54a43073a8b9
font_01_sfnt_off0000cd85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD85 10000 bytes
SHA-256: 0fa4d40d2ee5ee3bf37b5d2edf4803e4761602a231e857e0a4117b8ac20e43f6

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