Malicious PDF — malware analysis report

Static analysis result for SHA-256 0569781cf2d8bc24…

MALICIOUS

PDF

73.6 KB Created: 2021-05-15 22:24:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: ec7c2b4741a012761d42f35809f5bbc8 SHA-1: 2ccd185dc3ea40fe95979d74cee8e142ef789d82 SHA-256: 0569781cf2d8bc24198584f8805f59659d793cc1a7e1de51bb74dc0f24d523d5
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable hosting, indicating a link farm designed to redirect users to potentially harmful content. The presence of these URLs and the heuristic firing for PDF_SEO_DISPOSABLE_LINK_FARM strongly suggest a phishing or malware distribution attempt.

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://xezojetit.ru/strik?utm_term=examples+of+supply+chain+management+information+systems PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4472188/normal_6015986ca057d.pdfIn PDF document text
    • http://xidufefonudug.sportsontheweb.net/5961293572.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404503/normal_603fea870b69b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428043/normal_5fe60691b1646.pdfIn PDF document text
    • http://ubsvp.com/35692278386b3yc9.pdfIn PDF document text
    • http://ig-socialmedia.xyz/62968448801bmw6a.pdfIn PDF document text
    • http://picply.ru/how_much_does_it_cost_to_replace_charging_port_on_iphone_625gl8.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/Mg4iaii/66909946682.pdfIn PDF document text
    • http://kisuvok.scienceontheweb.net/xites.pdfIn PDF document text
    • http://hihikane.space/podigogazgu5a0.pdfIn PDF document text
    • https://cdn.sqhk.co/kosojevevoxo/jNshjTO/sausage_run_crazy_games.pdfIn PDF document text
    • http://mkr-olimp.info/how_to_remove_battery_from_motorola_minitor_vmdf68.pdfIn PDF document text
    • http://sekujirimabasas.getenjoyment.net/octet_stream_to_converter.pdfIn PDF document text
    • https://pevolevu.weebly.com/uploads/1/3/1/6/131606362/junaxeduw.pdfIn PDF document text
    • https://pedomolakikivo.weebly.com/uploads/1/3/4/4/134440841/mejilimoruwes_datibo.pdfIn PDF document text
    • http://instapriz24.site/neresajadopolusebufogejnpprj.pdfIn PDF document text
    • https://lugelobixo.weebly.com/uploads/1/3/6/0/136095506/4298908.pdfIn PDF document text
    • http://shopmzm.site/ratizef0ekds.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://todidetiped.onlinewebshop.net/cylinder_volume_and_surface_area_worksheet.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_off0000e284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE284 5556 bytes
SHA-256: 4d7f6c28ca1d0f2cccc158fa2869adb81573e964d7ef9e8e85f72c2fa9e32f57
font_01_sfnt_off0000f552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF552 10280 bytes
SHA-256: 746d20721827514ecfce241e4018d9b8488451b92b5d46919980fd4ab4bec70c

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