Malicious PDF — malware analysis report

Static analysis result for SHA-256 a20c2bf6e0a36df2…

MALICIOUS

PDF

68.7 KB Created: 2021-02-26 23:55:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6e19453020272dc42667f1dd39803649 SHA-1: 8a895783762356699da33beb85864e3680c42620 SHA-256: a20c2bf6e0a36df2ccd6b7b71799c17ff405b0a3c73363b46a3edf1096dc67a6
184 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=unitypoint+clinic+north+ankeny In PDF document text
    • http://ing-cliente.com/putogobovukuku4cp7f.pdfIn PDF document text
    • http://duzusedolatepe.mypressonline.com/telugu_alphabets_chart_with_hindi.pdfIn PDF document text
    • http://wegansit.space/26950746380g1agg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476924/normal_5fcd1751acfc4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382619/normal_600626d60538d.pdfIn PDF document text
    • http://lasomupigo.iblogger.org/78316941517.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490250/normal_5fe65984c991a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455196/normal_6026430c5a2b0.pdfIn PDF document text
    • https://gopikuximodel.weebly.com/uploads/1/3/1/3/131384340/wigar.pdfIn PDF document text
    • https://jalizirut.weebly.com/uploads/1/3/5/3/135308553/kuwogigufibuwawig.pdfIn PDF document text
    • http://wumewil.sportsontheweb.net/gupakosirebudexizejer.pdfIn PDF document text
    • http://teaapple.space/craftsman_radial_arm_saw_arbor_attachmentsjf87t.pdfIn PDF document text
    • https://zelowomuguzak.weebly.com/uploads/1/3/1/3/131379017/fovafev-lukerew-budazawetuw-robobapagibipa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sitasuwa.epizy.com/libokejogedajelasize.pdfIn PDF document text
    • http://widifusi.myartsonline.com/15659526593.pdfIn PDF document text
    • https://s3.amazonaws.com/nafamaragisek/flyers_templates_psd_free.pdfIn PDF document text
    • http://javuxanasojajex.epizy.com/how_to_do_nursing_diagnosis.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/poxamaji.pdfIn PDF document text
    • http://birotizedu.epizy.com/asos_size_guide_europe.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/67331170669.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_off0000d281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD281 5000 bytes
SHA-256: 7476efd6a11747f903e9811b77a765354c2f45c72017ec36d92a713024a811e6
font_01_sfnt_off0000e388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE388 9936 bytes
SHA-256: 2a3508a211b99299558adaea022e0137ae74d1ada628c9e8624c72d10b7ba51b

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