Malicious PDF — malware analysis report

Static analysis result for SHA-256 3560baf1d8b36d64…

MALICIOUS

PDF

77.2 KB Created: 2021-04-20 06:40:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d0db85c71d552e0888cce1ecdba3d728 SHA-1: efb4f04e58a6e4a366027c6d2217ee0f723793a3 SHA-256: 3560baf1d8b36d64bb4ac501248900ed5b3ff9ec13de6d4f8f52b1a8a91e8bf8
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery. The document body's title about COVID-19 exposure serves as a lure to encourage users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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/strik?utm_term=what+is+the+protocol+for+covid+exposure PDF link annotation
    • http://jijoxep.getenjoyment.net/esl_appearance_worksheet.pdfIn PDF document text
    • http://zasazigupat.getenjoyment.net/68099865065.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391303/normal_5ff2578abac40.pdfIn PDF document text
    • http://nakidki-alkantara.xyz/32382316328vkk0k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408004/normal_5ffd69af55a3e.pdfIn PDF document text
    • http://aduo5.online/zepisesmflzz.pdfIn PDF document text
    • http://livethailand.fun/443456591631kyro.pdfIn PDF document text
    • http://bokaxakoz.sportsontheweb.net/reformas_borbonicas_en_el_peru.pdfIn PDF document text
    • http://klyshsheff.xyz/dragons_of_atlantis_generals_guidec0b16.pdfIn PDF document text
    • http://ravovenovibu.medianewsonline.com/nipogozafitetatiwejap.pdfIn PDF document text
    • http://esmoney.site/tubigokoletozuxawoxuti8ngps.pdfIn PDF document text
    • http://fogejebimo.scienceontheweb.net/firaselexanajegofumasew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_60301d68b97d0.pdfIn PDF document text
    • http://100naturals.fun/60657365137ks3fv.pdfIn PDF document text
    • http://niluwipewuxasa.medianewsonline.com/baxunovogidubekigizo.pdfIn PDF document text
    • http://webcam-model.online/technocracy_risingntoik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447089/normal_6036b743e416b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403560/normal_60130a473e0eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490274/normal_5ff2abd16efd3.pdfIn PDF document text
    • http://bupimobim.sportsontheweb.net/6033732605.pdfIn PDF document text
    • http://gebuhrenfrei-mein.com/best_two_way_radio_motorolayuvpi.pdfIn PDF document text
    • http://jixazepo.mywebcommunity.org/antitubercular_activity.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368956/normal_5fd7a50420334.pdfIn PDF document text
    • http://bestcreditcheck.info/taurus_millennium_g2_hard_casezbwrl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417309/normal_603441d1f3c85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449172/normal_6044fe6d5c13e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://raxegujanamefas.atwebpages.com/78989411726.pdfIn PDF document text
    • http://gexegubiduw.atwebpages.com/instant_academic_skills.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_off0000f05c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05C 5384 bytes
SHA-256: 8fbe2baf8da530bb454b6f4983407f9e4a6fd8fd8334e37776749081398c3987
font_01_sfnt_off000102ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BA 10804 bytes
SHA-256: b0ca176ee45e7f18a59672f4632737eb8a41608b35704d56d2aa91ae6478f6cc

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