Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea2b1598caf98f6…

MALICIOUS

PDF

74.7 KB Created: 2021-02-13 03:43:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2c8ac8fa2c6bfd6451384250aca653b2 SHA-1: 105c91f18d54d0d71838f0840b54eeb19dd76976 SHA-256: 2ea2b1598caf98f6f2324c582112ac331f51b07e442bdf13a3477609cf5a84ce
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. The primary URL and several others point to potentially malicious or unknown domains, suggesting a phishing or content-luring scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/123?utm_term=google+drive+spider+man+into+the+spider+verse+in+english PDF link annotation
    • https://gutazalofekeva.weebly.com/uploads/1/3/5/3/135395177/moguroxavi.pdfIn PDF document text
    • https://rumarefux.weebly.com/uploads/1/3/1/0/131070750/dipefoviraw.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/egg9ieH/cash_money_app_game.pdfIn PDF document text
    • http://gramnews.xyz/no_job_too_big_milf_vr_torrent_downloadlvs9h.pdfIn PDF document text
    • http://vovevowumusiki.iblogger.org/78585606239.pdfIn PDF document text
    • https://cdn.sqhk.co/zururodi/a6TQ2gg/gezelexel.pdfIn PDF document text
    • https://nobakunifiximup.weebly.com/uploads/1/3/5/3/135310199/718eb858e.pdfIn PDF document text
    • https://cdn.sqhk.co/kawiwitifa/idibgd5/uk_pet_population_statistics.pdfIn PDF document text
    • https://womomoko.weebly.com/uploads/1/3/4/8/134848640/cdeb0b6c8d3.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/kotodur/help_a_reporter_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/58977779613.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/sudaleku.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/electrical_panel_schedule_template_autocad.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/33035514940.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_off0000def9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF9 5464 bytes
SHA-256: 946624ade730a15b0547d5b1a423111de160412b5089f05d3a05bc7ea24ce316
font_01_sfnt_off0000f16a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16A 13248 bytes
SHA-256: 9cb71b86d7963e42d503f034dcb5fd52b3d4794cc6f4f107d5b71f90cebae898

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