Malicious PDF — malware analysis report

Static analysis result for SHA-256 76206d420176192f…

MALICIOUS

PDF

99.8 KB Created: 2021-02-19 03:59:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9c170507eb5438fb671344568ddf8239 SHA-1: ee20c8c2efc21c8001e988b6f723ce093c7fb331 SHA-256: 76206d420176192fd24f904dc10cc5e82cf2094eec3cd78db41b0055ae9c22f6
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URLs and the PDF's structure suggest it functions as a link farm, likely designed to redirect users to phishing sites or download further malware. No scripts were extracted, but the PDF's nature as a link farm points towards a phishing or malware distribution attack pattern.

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://jottigo.ru/strik?utm_term=truy%25E1%25BB%2587n+ki%25E1%25BB%2581u+ch%25C3%25BA+gi%25E1%25BA%25A3i+tr%25E1%25BA%25A7n+tr%25E1%25BB%258Dng+kim PDF link annotation
    • http://steh-sistem.ru/after_effects_software_filehippo7bkxl.pdfIn PDF document text
    • http://latuha.com/on_in_under_worksheets_for_kindergarten4yvp7.pdfIn PDF document text
    • http://verenica.net/gubidireu7kbs.pdfIn PDF document text
    • http://tokio-2020.fun/maxwell_leadership_biblexhf8e.pdfIn PDF document text
    • http://dashcamtopbest.com/web_banner_design_templates_psd7zq4u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494147/normal_6002bfd50db05.pdfIn PDF document text
    • http://lisolu.org/soxuwebogowucnor2.pdfIn PDF document text
    • http://begemotiks.fun/239461838460e4i2.pdfIn PDF document text
    • https://kuxiwidozerapi.weebly.com/uploads/1/3/4/7/134728536/dobakekukodorevolu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420617/normal_5fc616482b3eb.pdfIn PDF document text
    • http://arfeshome.com/charas_full_movie_hd3j2ao.pdfIn PDF document text
    • http://maewallace.com/notasibabowuronuvowoji6722.pdfIn PDF document text
    • https://takadoturig.weebly.com/uploads/1/3/4/1/134108809/2055713.pdfIn PDF document text
    • http://stixlife.info/mathematics_an_illustrated_history_of_numbersi33kr.pdfIn PDF document text
    • http://scrlt.xyz/extenuating_circumstances_nottingham_form85iq7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476436/normal_6026fbcde2e28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393889/normal_5fe94d50a4a77.pdfIn PDF document text
    • https://jowufawogutezob.weebly.com/uploads/1/3/0/9/130969037/d3894242ef9efe7.pdfIn PDF document text
    • https://sigojexubaj.weebly.com/uploads/1/3/2/6/132682800/6426455.pdfIn PDF document text
    • http://storedubai.shop/30897309901ca111.pdfIn PDF document text
    • http://xsale.trade/rails_active_storage_previewro6sf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00013970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13970 6012 bytes
SHA-256: 2c62ba46cffa63187dd741993df422e21009ee8195e4f2ad4dd613e05b88fe2e
font_01_sfnt_off00014c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C22 23856 bytes
SHA-256: 1b43b669a3dc8d5912b5e82bfdd3ddfadfe13488d65163e81bb158c3c7e3ab0b

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