Malicious PDF — malware analysis report

Static analysis result for SHA-256 18969fc4e2798d39…

MALICIOUS

PDF

73.6 KB Created: 2021-02-21 19:50:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: db86d97d580a220e6a6ebe18dc9ef250 SHA-1: b3d5db72abff6950b5441433f87f0bd8b4af4a04 SHA-256: 18969fc4e2798d3902bf69c47f5ce8580ee32a67b7864741f46d6b0245792630
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/123?utm_term=when+can+you+wear+your+military+uniform+after+discharge In PDF document text
    • https://cdn.sqhk.co/jiluputumusi/cRvhad9/50326663866.pdfIn PDF document text
    • https://vebaxifi.weebly.com/uploads/1/3/4/3/134360040/juwopedeg.pdfIn PDF document text
    • https://sanijala.weebly.com/uploads/1/3/4/8/134889677/b8f2d4bcb6.pdfIn PDF document text
    • https://lepopitiw.weebly.com/uploads/1/3/4/7/134762721/64c2d.pdfIn PDF document text
    • https://kemodiduwe.weebly.com/uploads/1/3/4/2/134235489/4450856.pdfIn PDF document text
    • https://murexaxinafol.weebly.com/uploads/1/3/4/4/134456221/3482248.pdfIn PDF document text
    • https://jakugogafezokev.weebly.com/uploads/1/3/1/4/131437362/joruron.pdfIn PDF document text
    • https://pozimifekof.weebly.com/uploads/1/3/4/6/134674510/1248995.pdfIn PDF document text
    • https://lataladegizozav.weebly.com/uploads/1/3/4/6/134685495/luzovakedotowevitin.pdfIn PDF document text
    • https://pedagojewixa.weebly.com/uploads/1/3/1/3/131398360/labixoxezi_muwewovakosax_vawoduwidobew.pdfIn PDF document text
    • https://fomoxizukewoviw.weebly.com/uploads/1/3/0/7/130739072/fomosik.pdfIn PDF document text
    • https://sugelama.weebly.com/uploads/1/3/4/8/134898925/3469645.pdfIn PDF document text
    • https://webegoxu.weebly.com/uploads/1/3/2/6/132682681/225019a16063b5.pdfIn PDF document text
    • https://zaxixeresez.weebly.com/uploads/1/3/1/8/131871416/guwivewotaf.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/vutame/project_progress_dashboard_excel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/miwoliken.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/rowut.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/american_bolt_action_rifles_ww1.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_off0000de18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE18 5644 bytes
SHA-256: 3583d3fb71c9e1815c358420f73560338a7fe51062b6d91417301b666be70f46
font_01_sfnt_off0000f141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF141 11016 bytes
SHA-256: 899d13f219ec4b16e96ec976b63a6637a61fc2e1cbc31e883caf41dee365e7e7

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