Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f1ad0e37e714896…

MALICIOUS

PDF

77.6 KB Created: 2021-03-08 10:22:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ff26ab818f8e4df713e7e4762dc9f302 SHA-1: 89a2cc9e8e38994efb2e3c600438856b12efe676 SHA-256: 6f1ad0e37e7148961cfe0dd47ce22d3f9728100a59ba68dc755eb418d91ccbe7
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with one identified as malicious and hosted on a disposable domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/strik?utm_term=american+society+of+mechanical+engineers%2527+standard+b31.3 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4488349/normal_5fecb1a36c92f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465145/normal_5ffa3703c0293.pdfIn PDF document text
    • http://lunatan.medianewsonline.com/jobolisop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501214/normal_5fd05bd59eb28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411696/normal_5fdaefd1197f6.pdfIn PDF document text
    • http://peroruse.iblogger.org/nakelopor.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/bulonivabelesuviraviban.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367959/normal_601776a263ca8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384167/normal_6029c5ec7fcf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413845/normal_601b619cc1c14.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/lanorolowu/biblia_nvi_descargar.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/proscan_plded3273a_reset_button.pdfIn PDF document text
    • http://pegalepumatadur.rf.gd/2016_corolla_le_plus_specs.pdfIn PDF document text
    • http://jasesazolaf.myartsonline.com/12466207633.pdfIn PDF document text
    • http://papetamunamu.epizy.com/50948781299.pdfIn PDF document text
    • http://zitasixan.atwebpages.com/cat_opoly_game.pdfIn PDF document text
    • http://tejusadesivuti.epizy.com/leravebaxadeta.pdfIn PDF document text
    • http://gapitufukiwiti.epizy.com/tonupof.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/zesiropekalagu.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/i_r_c_t_c_app.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/fun_book_reports_for_high_school_students.pdfIn PDF document text
    • http://fozidunaleral.rf.gd/acfe_report_to_the_nations_2016_powerpoint.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_off0000f030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF030 5948 bytes
SHA-256: 17f9b46d1e8f04d52fe9b00cb5b9b8b4e9df122c4050eb061a673ad94940da3a
font_01_sfnt_off0001045a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045A 10608 bytes
SHA-256: 7e586228319bb450ce15908224646ef563fff6468aa07b9ec4fdf40417578847

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