Malicious PDF — malware analysis report

Static analysis result for SHA-256 11866f32a04bc125…

MALICIOUS

PDF

66.4 KB Created: 2021-02-26 00:28:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 27b58754198225d0cec21497d8073889 SHA-1: 3c9d352f9c9f9cf380a0693739d09c55d51d48f8 SHA-256: 11866f32a04bc125871de8cb75e7ef1764a3b0dffdf072a74a6753f6337d7365
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://jacksth.ru/123?utm_term=johnson+9.9+hp+outboard+motor+parts PDF link annotation
    • http://todayshop.website/speed_and_upload_speed_ratiov2uww.pdfIn PDF document text
    • http://nekuwagibajese.getenjoyment.net/css_tutorial_free_download_for_beginners.pdfIn PDF document text
    • http://detonicinitalia.website/zebokitadokotusixotuj203cj.pdfIn PDF document text
    • http://fb-pageunderreview.com/sharp_tv_remote_control_manualog2ih.pdfIn PDF document text
    • http://tixshopclub.space/37158499810jg4pd.pdfIn PDF document text
    • http://zogoxadaxagan.iblogger.org/guzilobuxixalugod.pdfIn PDF document text
    • http://idealicaitalia-official.site/544484474015ldqr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vuremekewema.rf.gd/nibakorakapipim.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/affine_transformation_matrix_inverse.pdfIn PDF document text
    • http://wotalajo.epizy.com/caustic_3_sound_packs_free.pdfIn PDF document text
    • http://namakanexir.atwebpages.com/kozalumejikubisoxomise.pdfIn PDF document text
    • http://vugugoma.rf.gd/vista_128_delete_master_code.pdfIn PDF document text
    • http://vorisenunajix.myartsonline.com/cisco_sg300_default_setup.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_off0000c295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC295 5484 bytes
SHA-256: fc94726de553511f12f20ca1ffa5f25de4c416c71fb6343b6e373c75cb1238be
font_01_sfnt_off0000d504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD504 11136 bytes
SHA-256: 4f821eb38774af4fa3de7553ee7c032eb73b91b606a05692ad988b9ccc4883d6