Malicious PDF — malware analysis report

Static analysis result for SHA-256 40b35d26e22673a9…

MALICIOUS

PDF

49.3 KB Created: 2020-11-05 08:52:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 602e8a660cfe8a1f67d97416d5db60a7 SHA-1: 41e095153efe0e5725e83e9a47b39d6eccf6f961 SHA-256: 40b35d26e22673a94abaaa399bf1d16135769f14ebc6365ffaf8ec346d76011e
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://ggtraff.ru/aws?keyword=warframe+dry+dock+quest In PDF document text
    • https://zevejekigo.weebly.com/uploads/1/3/4/3/134374512/ca0e717.pdfIn PDF document text
    • https://wozofawado.weebly.com/uploads/1/3/0/8/130874325/cf60b75dc9.pdfIn PDF document text
    • https://tanezogifa.weebly.com/uploads/1/3/4/3/134321065/227700fda251d8.pdfIn PDF document text
    • https://nulixedupalaz.weebly.com/uploads/1/3/0/7/130739510/ba635a12.pdfIn PDF document text
    • https://mekuxiwefajup.weebly.com/uploads/1/3/0/7/130739023/085ca66d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370092/normal_5f9beb9eac815.pdfIn PDF document text
    • https://xexovelez.weebly.com/uploads/1/3/0/8/130813416/4c2ca5b.pdfIn PDF document text
    • https://jivexine.weebly.com/uploads/1/3/1/3/131380908/9332899.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412767/normal_5f9bed698d56b.pdfIn PDF document text
    • https://dunujamovexen.weebly.com/uploads/1/3/4/3/134361976/e22bc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/46c96d8a-2952-458a-a7ef-9391512d6965/84358871746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fbaa7fa-4085-403a-98d2-31d48b3cc8cb/kaguzorurojugatusonavidot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67d23221-fa79-4d1c-830b-81bb2fb57e3b/lacrosse_field_dimensions_2020.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7413 5168 bytes
SHA-256: 43fed1a2141c8052b1973a49de356c2165c24a4186bafb6f9db592c72049a9e7
font_01_sfnt_off000085bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85BD 10684 bytes
SHA-256: eb85b11fa27163bc146307675cadd14910e3e02500639e114eb30b4a4b88dbbc
font_02_sfnt_off0000aa10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA10 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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