Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e958bc4002dd75a…

MALICIOUS

PDF

76.4 KB Created: 2021-04-05 05:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 63a62ad9283065ad99ef606e7aa3a47c SHA-1: b1719ac212fcc46898c4b8d18635910715cbeff5 SHA-256: 2e958bc4002dd75a8c3888606572efea750dfb48cd19a7c5be6380ebc3fbce0e
126 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable or community hosting, suggesting a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' confirms this, indicating a strategy to obscure the true destination. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with phishing or malware delivery campaigns.

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 http://vumogegotawugub.mypressonline.com/cesare_pavese_poesie.pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4474475/normal_606a50e6f3056.pdfIn PDF document text
    • http://kafidovomiguvo.mywebcommunity.org/reduce_size_mac_quartz_filter.pdfIn PDF document text
    • https://folejate.weebly.com/uploads/1/3/4/9/134902611/9458057.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375698/normal_603e23e426b70.pdfIn PDF document text
    • http://haifaiv.ru/527242534311kspr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450036/normal_6006e68104193.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428342/normal_602112f5acb8f.pdfIn PDF document text
    • http://bebolekuku.22web.org/proceso_de_lodos_activados.pdfIn PDF document text
    • http://radogomi.mygamesonline.org/vadiligamaleb.pdfIn PDF document text
    • http://kupimaxi.sportsontheweb.net/rewepenebukopejag.pdfIn PDF document text
    • http://expo-kit.ru/97864852272p7msd.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/86158883351.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416136/normal_5ff06954c8f53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409607/normal_603950b205645.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366036/normal_5fc73227777eb.pdfIn PDF document text
    • https://bosofivi.weebly.com/uploads/1/3/4/6/134668799/kivomonu_sogopegerupeka_zekigowi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/4NO0L8wlyOA/wb?keyword=kindle%20keyboard%20wonPDF link annotation
    • http://dadojusox.epizy.com/bpsc_mains_question_paper_60_62.pdfIn PDF document text
    • http://ronopijitol.rf.gd/azure_active_directory_domain_services.pdfIn PDF document text
    • http://kabutusagop.rf.gd/what_is_the_history_of_islam.pdfIn PDF document text
    • http://kafuvaxuxele.epizy.com/4th_grade_math_vocabulary_worksheets.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_off0000ec9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9C 5220 bytes
SHA-256: 38de90c1a00f29fc8c6348a1093369910817c7055174d03fb86341594052e902
font_01_sfnt_off0000fe87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE87 10996 bytes
SHA-256: 87ce3c78ccdeb50f8e77577d99a063a04a020133c8886a3e6f1321f02e766c1e

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