Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0c71b01cb57bb00…

MALICIOUS

PDF

66.5 KB Created: 2021-03-19 20:25:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 23cd363eff9b500d8758289d08e8c1c7 SHA-1: 76bcf019e9c13bb147277f9715b10d9e4880f2cd SHA-256: e0c71b01cb57bb0082c5893475fcd09b8b26d99050e2576b2da0e47d9aa61861
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary one pointing to a suspicious domain associated with phishing lures. Heuristics indicate it functions as a link farm on disposable hosting, and ClamAV detected it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/strik?utm_term=brandy+melville+locations+in+northern+california PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409107/normal_5fd8a091a5c5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387411/normal_5fed01a84e66c.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/tagupuzowederebikus26cl3.pdfIn PDF document text
    • http://sigisuzuk.getenjoyment.net/hodder_cambridge_primary_science_stage_5.pdfIn PDF document text
    • http://boost-store.net/121253901429j6ir.pdfIn PDF document text
    • http://hs-life.ru/knowledge_base_templatewcwlt.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/vivovejobilew.pdfIn PDF document text
    • http://sevoxotedeki.medianewsonline.com/vadorogokodizasexogizo.pdfIn PDF document text
    • http://knitfqph.site/honeywell_home_wi-fi_7-day_programmable_thermostat_rth6580wf1001_wb3isl.pdfIn PDF document text
    • http://lnstagramcopyrightmanagement.com/38895323110f1j15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477651/normal_600cef9c5b708.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450044/normal_5fe6a58560dff.pdfIn PDF document text
    • http://zemesod.getenjoyment.net/47852159826.pdfIn PDF document text
    • http://peluxuba.sportsontheweb.net/pizzeria_due_a_chicago.pdfIn PDF document text
    • http://bewilotaweje.mywebcommunity.org/terexanelup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xakexuxav.rf.gd/fakajogexajefunonodivatav.pdfIn PDF document text
    • http://nefaped.epizy.com/building_covalent_molecules_worksheet.pdfIn PDF document text
    • http://felubumasosazi.epizy.com/50387310413.pdfIn PDF document text
    • http://bovubodomumid.epizy.com/autodesk_vault_user_manual.pdfIn PDF document text
    • http://bexukavibume.myartsonline.com/wijono.pdfIn PDF document text
    • http://ropupifalapoges.atwebpages.com/what_is_spiritual_authority_in_the_church.pdfIn PDF document text
    • http://betakudo.atwebpages.com/79282437067.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_off0000c6c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C8 5472 bytes
SHA-256: f1019690969e5443c765a136dbd55165d3eed6e2ef528d5571ba07a0497c355d
font_01_sfnt_off0000d94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94B 10180 bytes
SHA-256: 9b258fbb8843c621770db4fbdf3e8360dc5ed7c970d4dee3fe277704b49a31c7

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