Malicious PDF — malware analysis report

Static analysis result for SHA-256 74dd99f12738ce55…

MALICIOUS

PDF

49.9 KB Created: 2020-10-03 00:18:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: da07beb6cea9271eeb5a8d2a7cd08d09 SHA-1: b0da04601aadca811c1f0ecbca350b4a8d5139c9 SHA-256: 74dd99f12738ce55f80fea8999df04bd38fcecfc6eb57c86491d84f8ef7ffcc8
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://cctraff.ru/strik?keyword=arctic+king+portable+air+conditioner+manual In PDF document text
    • https://site-1036883.mozfiles.com/files/1036883/vadurus.pdfIn PDF document text
    • https://site-1041679.mozfiles.com/files/1041679/55738588498.pdfIn PDF document text
    • https://site-1038343.mozfiles.com/files/1038343/kesiliwofiluwo.pdfIn PDF document text
    • https://site-1036819.mozfiles.com/files/1036819/12111822354.pdfIn PDF document text
    • http://raxasew.seedpreschool.org/uploads/1/3/1/3/131379732/fadatej.pdfIn PDF document text
    • http://banovote.mikeshawna.com/uploads/1/3/2/7/132710567/velarajukivivix-tosakefotonabi.pdfIn PDF document text
    • http://vuwomozu.artculturevs.org/uploads/1/3/1/3/131379394/debazemololumobug.pdfIn PDF document text
    • http://zugot.boutsandbows.com/uploads/1/3/1/3/131379163/bofebemutaragi-kijuven-tuzavel.pdfIn PDF document text
    • http://sakopunal.julliaraephotography.com/uploads/1/3/1/1/131164312/2251980.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccff3cd8-9557-4e50-9ad0-917edd6005aa/jurug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/491a80a5-24b7-49b1-84c5-538bb5c58de5/nosijex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf31c8ea-e659-49a4-8dfb-fed48a60e7ad/96584344816.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de706775-269d-4aa2-8aca-11590434e649/1239530583.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e414664-41c6-4a8f-96a6-3d2e0c9ec8df/fajuleselutejopirono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef189d41-3e13-4c45-90db-3c6ce952d1af/dirabumedovofufalagixizig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34c685a6-dbfa-4273-8632-d2cc431f6423/78051840407.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e0e6496-24c8-488d-be67-73fb34726020/11869480638.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_off0000851c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x851C 5408 bytes
SHA-256: 656b23456ade6e0162f5a7107c4c72fa7808cbcf257233dcfb627b842281ef32
font_01_sfnt_off00009773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9773 10136 bytes
SHA-256: 90fa691ee44fcfa9d63a7a90f92221ee21bc78ea15377cb0fff4c3eaf19c7c59

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