Malicious PDF — malware analysis report

Static analysis result for SHA-256 39fe0589b5bfaa4a…

MALICIOUS

PDF

82.6 KB Created: 2021-03-10 01:16:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4ebdc6f207747dc0c858d44073ac7ce7 SHA-1: 2ec456b61d99bb72ed293d7e0084f98a582fda96 SHA-256: 39fe0589b5bfaa4a56ae35b1e254a670a6dc910444b4acb2a73575d31e66b907
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://ponafet.ru/aws?utm_term=what+is+the+importance+of+hajj PDF link annotation
    • http://nokasosozigof.mypressonline.com/fakudaxiwedozegufa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403276/normal_5fffd46a82a78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477155/normal_6036b7e1cd91e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393641/normal_601ac5f163951.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413719/normal_600f8bd0c78da.pdfIn PDF document text
    • http://xevusezes.medianewsonline.com/whirlpool_gold_quiet_partner_iii_replacement_parts.pdfIn PDF document text
    • http://tomobufefiz.iblogger.org/mcdougal_littell_algebra_1_online_textbook.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/how_to_reset_prius_maintenance.pdfIn PDF document text
    • http://mazafaka69pussy.online/que_es_control_de_signos_vitales_en_enfermeria3ycnq.pdfIn PDF document text
    • http://wivevemeb.scienceontheweb.net/zopamitiloriwifudamizo.pdfIn PDF document text
    • http://medgaj.com/aaru_movie_songs_comuc6tx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372967/normal_601636b42fbf2.pdfIn PDF document text
    • http://jiteruruw.sportsontheweb.net/34311475657.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485807/normal_6032d24a8268a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422897/normal_6024836894a17.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rabatelekovufar.myartsonline.com/how_to_cast_pure_flix.pdfIn PDF document text
    • http://jidaxel.rf.gd/72283937043.pdfIn PDF document text
    • http://kakasis.onlinewebshop.net/82187752804.pdfIn PDF document text
    • http://joluromimazatub.epizy.com/32013687616.pdfIn PDF document text
    • http://rugafisa.epizy.com/ethyl_chloroformate_solubility.pdfIn PDF document text
    • http://susebuxusebug.epizy.com/xawopenijag.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB6 5312 bytes
SHA-256: 8fb8958fdd47864c2694f7207ae710ccde7199992b5a97f57063f56680b43702
font_01_sfnt_off0000ffae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAE 10504 bytes
SHA-256: d30f81369a4ec4588606cf67dd57f8da54fa10178b92e936c69957b42dca74c0
font_02_sfnt_off000123dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123DC 17072 bytes
SHA-256: 9595ec8685f2992727ceed59adfc2ee92e7de742b838cfad39ade150da5514ec

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