Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f20e76ebcac854f…

MALICIOUS

PDF

83.6 KB Created: 2021-03-25 09:19:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6e931304b538b93a376da5f9fda4a5eb SHA-1: 9b797e8004cae4130de012b169c04cf159667d6c SHA-256: 0f20e76ebcac854f955293a5aacf025f01cf3a5e8266f6b7e743d51150b44694
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically targeting a search term related to 'best self journal examples pdf'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a malicious intent to redirect users. The ML classifier and ClamAV detection strongly indicate malicious content, likely phishing or a scam.

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://baarspo.ru/award?keyword=best+self+journal+examples+pdf PDF link annotation
    • http://lilubaxubaxulu.sportsontheweb.net/1667567314.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377909/normal_6008c03fc3d3e.pdfIn PDF document text
    • http://yourlivehelp.com/gezidemozijuvul4q5k6.pdfIn PDF document text
    • http://argo-tourism.com/marathon_watch_wr50m_military_time28mn3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489257/normal_6054ec605c6d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_601b00f10d312.pdfIn PDF document text
    • http://dududuw.mypressonline.com/rurolunizi.pdfIn PDF document text
    • http://zanovekolasin.mywebcommunity.org/dujuso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409098/normal_5fcdb38009d5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477638/normal_603fb91327ed0.pdfIn PDF document text
    • http://basvuruizleme.online/mekegopiwamoxemepawoxnek5b.pdfIn PDF document text
    • http://kimokabif.medianewsonline.com/surat_al_waqiah_arab_latin_dan_terjemahannya.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gemovimuwopete.atwebpages.com/nerasizukudojafawisepoto.pdfIn PDF document text
    • http://refusunono.onlinewebshop.net/jadeko.pdfIn PDF document text
    • http://teropisarazo.myartsonline.com/how_to_adjust_chain_oiler_on_stihl_ms171.pdfIn PDF document text
    • http://desuvusemexemob.epizy.com/60647129558.pdfIn PDF document text
    • http://wajiletum.epizy.com/shakespearean_sonnet_form.pdfIn PDF document text
    • http://vawirir.atwebpages.com/btw_aangifte_formulier.pdfIn PDF document text
    • http://zupotid.epizy.com/ninafizefu.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_off00010689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10689 5380 bytes
SHA-256: 5bfabdfd16d93246b99d0e7267ec71398b90d1276cdd10a6999339c5a6709e25
font_01_sfnt_off000118ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118CA 11664 bytes
SHA-256: 72e52aeef8d9a39fff00056f612f980c2b503f0a046449af7ff6af9a0ecb120d

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