Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2dfe9adb71a1f5…

MALICIOUS

PDF

74.3 KB Created: 2021-03-02 21:50:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3eb58c0ec4e4ad4647e1d5759723302e SHA-1: 27ebd7ea11fc1bfdf215d13b0996be11b4bc5f01 SHA-256: ed2dfe9adb71a1f56452040116c966fd8cba3408b1f9cdacfa0c66b1ab421ee7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a malicious link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to exploit users via a malicious link.

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://botokaw.ru/strik?utm_term=line+6+spider+jam+amp+price PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451742/normal_5fcbfe100e996.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/black_and_decker_rice_cooker_plus_lid.pdfIn PDF document text
    • http://bamovewube.22web.org/padetibozawidovima.pdfIn PDF document text
    • http://nanonewe.scienceontheweb.net/mossberg_500_ag_pump_slide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402503/normal_5fe95cf6dd2a1.pdfIn PDF document text
    • http://nefovirarud.iblogger.org/65664402296.pdfIn PDF document text
    • https://cdn.sqhk.co/xanodujijefu/Tf2uP13/48547270561.pdfIn PDF document text
    • http://jagodadexujuza.iblogger.org/47745488381.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zubiluwetij.myartsonline.com/pazapivuzi.pdfIn PDF document text
    • http://vawerudarasikow.myartsonline.com/35702520420.pdfIn PDF document text
    • http://wulitebajanuba.rf.gd/honda_power_washer_2600_psi_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/puxeto.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/rodebofenofigoxol.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/husky_445e_specs.pdfIn PDF document text
    • http://vewamekigobuzuw.epizy.com/alphabet_letters_worksheets_for_kindergarten.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_off0000e42a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42A 5356 bytes
SHA-256: 11167d478cbd9fd97ed4798bd12547b460ecce9924f87a29dc29e6987b74daee
font_01_sfnt_off0000f64e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64E 11192 bytes
SHA-256: 8a7273d0de0c927b1ab1c0cf377f1ecbfdf5e6cb172455f347767bdcc0257ab5

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