Malicious PDF — malware analysis report

Static analysis result for SHA-256 7505c559b391a304…

MALICIOUS

PDF

76.4 KB Created: 2021-03-30 11:33:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 7a9fb9a3584fb4d8ed7646240946f591 SHA-1: 1ac2f1904493082831ae8e2c08a7c0b73a6fba20 SHA-256: 7505c559b391a304d5551e1d469852ac57e10b670daad516b177dd0038bba944
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI that redirects to a suspicious domain, likely as part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

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://vilenefex.ru/wix?keyword=modern+biology+chapter+10+section+4+review+answers PDF link annotation
    • http://vorecan.space/58501830577rkgq8.pdfIn PDF document text
    • http://zowifupure.iblogger.org/sopa_de_letras_en_ingles_para_adultos_para_imprimir.pdfIn PDF document text
    • http://antinomi.design/585090733rq2qs.pdfIn PDF document text
    • https://verikadofaja.weebly.com/uploads/1/3/2/3/132303102/tomosefibufonan.pdfIn PDF document text
    • http://lg-supportteam.com/why_is_ashes_in_the_snow_rated_r5dt1a.pdfIn PDF document text
    • https://kofasarafafe.weebly.com/uploads/1/3/5/3/135390193/losiduxawigonemu.pdfIn PDF document text
    • http://milky-rp.space/bogizgj5ms.pdfIn PDF document text
    • http://gnoogle.site/gitabozebaxezivetho99h.pdfIn PDF document text
    • http://uscovidcharts.com/que_significa_ser_lider_a_nivel_de_empresaduqsc.pdfIn PDF document text
    • http://pokypka.xyz/13913721937oqjo4.pdfIn PDF document text
    • http://lnstagramservicecopyrights.com/accrington_academy_sixth_form_number1o59a.pdfIn PDF document text
    • https://sepiximefajo.weebly.com/uploads/1/3/4/8/134849953/2681cf9f2bf.pdfIn PDF document text
    • http://aycotoro5.xyz/puzowovenesks85.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/afc19824-344c-4490-a256-a208c54300f7/50_shades_of_gray_2020.pdfIn PDF document text
    • http://xonisuxumezitez.epizy.com/software_brother_dcp-_t310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ad0a33a-0ce0-4528-be65-6e15944da340/sat_math_practice_test_with_answers.pdfIn PDF document text
    • http://simufuravaged.rf.gd/13091882173.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_off0000ec74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC74 6016 bytes
SHA-256: 24046a190ffc64e0dfba5476e0a826ca10a18fd7559549628393b66ba49fe98d
font_01_sfnt_off00010114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10114 10288 bytes
SHA-256: aea429da1492c28cba5f2257bc243bc8bae1f8403070745ad5878db03632b795

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