Malicious PDF — malware analysis report

Static analysis result for SHA-256 edb723b69c869f30…

MALICIOUS

PDF

66.9 KB Created: 2021-02-09 21:39:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 8ced633205656f3f1a22cf58238008e5 SHA-1: 7c8000929baafabdf0d40b6bc43b929ea7a1ef02 SHA-256: edb723b69c869f3077fbd0cf25b532da14d57a1dc7d52dc02e705934ef7717f1
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/wb?keyword=igcse%20edexcel%20chemistry%20revision%20guide%20pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4470542/normal_6006d6fb8fdc6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409627/normal_60090e45e0cc6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370533/normal_5fedf115411f1.pdfIn PDF document text
    • https://cdn.sqhk.co/kunimoxifagi/5JhaSje/15432494023.pdfIn PDF document text
    • http://naturalm.space/cambridge_checkpoint_maths_coursebook_8aj0y8.pdfIn PDF document text
    • https://fibetenozogu.weebly.com/uploads/1/3/0/8/130813768/463419.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446263/normal_601b9a7cda72a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484097/normal_5fd389b988220.pdfIn PDF document text
    • http://kilagine.22web.org/36053518901.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/SjaVDic/gnuplot_line_color_key.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443814/normal_600e389d0f74d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448735/normal_60141ff042a30.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://koxowasone.epizy.com/2952954527.pdfIn PDF document text
    • http://rajamuviw.epizy.com/diabolik_lovers_more_blood_psp_game.pdfIn PDF document text
    • http://vupikefugogulup.epizy.com/xekijiboxef.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_off0000c91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC91B 5524 bytes
SHA-256: a236f333ae1770637a271ba586a928d6ba6ed52f7213f98d9bd663aba27ed9f3
font_01_sfnt_off0000dbcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCF 10272 bytes
SHA-256: bf3acaeb799a8225c52c2bacdf10ae3eabb70232b444d6a9429dc4ce699869a7

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