Malicious PDF — malware analysis report

Static analysis result for SHA-256 23195909cd0eb25c…

MALICIOUS

PDF

63.6 KB Created: 2021-02-17 02:21:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 30424550631cc1a38dccc4f1361f4a3a SHA-1: ac3ce8fe408c6ad65d6138cecee512b82016f906 SHA-256: 23195909cd0eb25c6ca20295fe7ab7b9902e344eb4387765dcdcea780402a136
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/wix?keyword=scuba+suit+ark In PDF document text
    • https://cdn-cms.f-static.net/uploads/4502246/normal_5fe974cdb7079.pdfIn PDF document text
    • https://cdn.sqhk.co/munoforifuso/NnjcD9D/82997514890.pdfIn PDF document text
    • https://cdn.sqhk.co/moxelutedoje/bhaihZO/16853739127.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477873/normal_5fd146cb221cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475196/normal_60147c33bde4c.pdfIn PDF document text
    • https://jiparebifipi.weebly.com/uploads/1/3/4/6/134638028/654c0b78bfa.pdfIn PDF document text
    • https://sipexagugiresu.weebly.com/uploads/1/3/4/6/134607427/87b28b5.pdfIn PDF document text
    • https://gesunewa.weebly.com/uploads/1/3/1/4/131438127/loporogotirip.pdfIn PDF document text
    • http://naropiwazufilu.22web.org/11545130002.pdfIn PDF document text
    • https://cdn.sqhk.co/xoraxuvonaf/Biiggjd/planetary_model_of_the_atom_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/nixivezez/gizBnjf/lerajivulixurawofimabazu.pdfIn PDF document text
    • https://bigubiforuse.weebly.com/uploads/1/3/5/3/135389938/duriparimolafin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vogizopenukese.epizy.com/zumuvapuvigudiralotatipe.pdfIn PDF document text
    • http://fopagozijudiri.epizy.com/uc_browser_themes_for_pc.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_off0000bf67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF67 5068 bytes
SHA-256: aa10121874704cdd4cbb791f49622958184f351ddc49ac60db95fbe37df70c7c
font_01_sfnt_off0000d0b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B5 9784 bytes
SHA-256: 2d82eb726dc687f7ad2839e8e7c7cd3005fea2b10812fbcda10028ccc1be9e59

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