Malicious PDF — malware analysis report

Static analysis result for SHA-256 42683384d93e1f58…

MALICIOUS

PDF

35.5 KB Created: 2020-10-03 00:19:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 27fa1ba3809988ef038ea21a97088be8 SHA-1: 3d2933f7886c3efce187d7b2f8ef6ab93079242c SHA-256: 42683384d93e1f589c174511ae8e4d5a2207d5189f3358e5c8536cee34504c8a
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://gettraff.ru/pify?keyword=macroeconomics+workbook+principles+and+practice+answers In PDF document text
    • http://files.themayecenter.com/uploads/1/3/1/3/131398573/8258953.pdfIn PDF document text
    • http://kodabira.tapestrymft.com/uploads/1/3/2/7/132740606/1487125.pdfIn PDF document text
    • http://futenamom.mogulpark.net/uploads/1/3/2/7/132712237/tiredurilige_zuzudeta_sekux_fitapoliso.pdfIn PDF document text
    • http://files.eilenbergerrarebooks.com/uploads/1/3/1/8/131856700/lezipevom.pdfIn PDF document text
    • https://site-1036818.mozfiles.com/files/1036818/kobebametizadaf.pdfIn PDF document text
    • https://site-1036697.mozfiles.com/files/1036697/60007946341.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0420/1640/files/zapekifudekefimazisemedix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/5152/0678/files/natural_cafe_menu_westlake_village.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0097/7829/files/54155310459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/933d7015-d456-4376-a665-c96b79be20a7/8407202370.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbc376da-9150-44e5-946f-17a4c3051c03/pupexi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94393bbc-a733-465e-b7b7-669992111417/fosugefezafowotexef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a78038e5-741c-4104-9594-a1359c86d3dd/bigugi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57ffade3-bb2e-4beb-b807-ad806777ff06/xotenukogazosiguzabubera.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_off00004d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D1B 5520 bytes
SHA-256: ecae746fe45cfc9d687bddabc70e6c90cf8ff6bcab055e6a4c6f2da30db6d4a8
font_01_sfnt_off00005fe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE1 9544 bytes
SHA-256: 2e178a4e40dfbb9da6e730a456a829dce2afec00bae891b4fcd4fd398651b94b

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