Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdb63bea93a31497…

MALICIOUS

PDF

76.2 KB Created: 2021-03-01 22:41:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d580135c3fe498d464d792316fd46b79 SHA-1: d764973394bd4d480a5674d38ad3b7c9d3a73337 SHA-256: bdb63bea93a314973dbf631af55513cbf6621f28457a53d9c5b033be664d0f6d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs that redirect to a link farm, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to direct users to malicious content or further exploits. No scripts were extracted, but the structure and embedded URLs point towards a phishing lure.

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://leonvi.ru/strik?utm_term=how+to+fix+fridge+that+won%2527t+get+cold PDF link annotation
    • http://fanisore.sportsontheweb.net/jukapavovalodesejikurij.pdfIn PDF document text
    • http://jokojujut.medianewsonline.com/how_fast_can_the_body_heal_itself.pdfIn PDF document text
    • http://1xbet-sportstavki.fun/85047268284j84fv.pdfIn PDF document text
    • https://cdn.sqhk.co/nupozifulija/hjiedib/war_commander_inicio_facebook.pdfIn PDF document text
    • https://cdn.sqhk.co/rizinutix/jbOeif3/91534910855.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420752/normal_600a0c99cef67.pdfIn PDF document text
    • http://kupivse.xyz/792289524003i0nr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450046/normal_5ff0ba9e1c982.pdfIn PDF document text
    • http://vosajizegek.mypressonline.com/cuanto_es_8_centimetros_en_milimetros.pdfIn PDF document text
    • http://gibipimaxadebip.iblogger.org/system_analysis_and_design_report_template.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480594/normal_5ffd733ddd6d3.pdfIn PDF document text
    • http://intekzafast.online/animal_crossing_pocket_camp_mod_apk_2019f31pj.pdfIn PDF document text
    • http://paselon.getenjoyment.net/87834674611.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416671/normal_6024f51b62bf5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zorijefugixor.atwebpages.com/should_i_install_python_to_path.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/flyboys_movie_worksheet_answers.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_off0000ec97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC97 5260 bytes
SHA-256: a5162f0417b8ecd0875cc84a4d46f748150578ee33e8ce6809a04131754f3c79
font_01_sfnt_off0000fe93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE93 10784 bytes
SHA-256: 65a8fceed6c53f4e6de49d0e66da35dccbf0a79616065eed234a769776e85918

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