Malicious PDF — malware analysis report

Static analysis result for SHA-256 54a635486f94af07…

MALICIOUS

PDF

67.7 KB Created: 2021-02-12 13:03:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: fa3a826c9d852bbbb338e88f5397fcd3 SHA-1: b8970e704bcb1365db2fe75d21af46d9506b7a8b SHA-256: 54a635486f94af07eaf87f46fbe147aaf4f3542150e30704a8df80e51e205077
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://crophysi.ru/wix?keyword=sentence+variety+worksheets+ks3 In PDF document text
    • http://sbrf.link/19901717548lo0o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501495/normal_5ffaa9d4dcfbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413345/normal_601e95bf4b4ff.pdfIn PDF document text
    • http://santand-es.com/nazomezabemutufagqt318.pdfIn PDF document text
    • http://moymagazin.xyz/13845162086izbt5.pdfIn PDF document text
    • http://9gusevshop.space/memphis_ts_escort7pst7.pdfIn PDF document text
    • https://xeraxoxatetubus.weebly.com/uploads/1/3/5/9/135993523/kewoz-lapiwefaki.pdfIn PDF document text
    • http://ca-manalapan.space/7817626142qem1b.pdfIn PDF document text
    • https://jomokojexenubi.weebly.com/uploads/1/3/4/8/134877089/e8364313692de5.pdfIn PDF document text
    • https://nodeseverew.weebly.com/uploads/1/3/5/3/135323512/mixetukalokof.pdfIn PDF document text
    • https://tofukoluto.weebly.com/uploads/1/3/0/7/130775982/5358161.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402250/normal_5fe8c2a0c0418.pdfIn PDF document text
    • https://dikekivex.weebly.com/uploads/1/3/0/7/130775400/bimorexor_gibiwo.pdfIn PDF document text
    • https://pigulanofalo.weebly.com/uploads/1/3/1/4/131406379/xemedefokavuwoso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426410/normal_6025270225276.pdfIn PDF document text
    • http://50off.pro/963925183081r1lp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xeroguru/86398989874.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/zabaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/new_minister_of_india_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/20552193087.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_off0000cc3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC3E 5440 bytes
SHA-256: c0868714d01d6f7bf1a52cc63e84d6e95266e1e5b71ece2425aefc5712582ef8
font_01_sfnt_off0000dedc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDC 10116 bytes
SHA-256: da6737b59b17d88e0d6f4e1a00a063565526924d9271b7486b70a57aeaa424f7

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