Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8c15284a1420896…

MALICIOUS

PDF

52.3 KB Created: 2020-11-04 09:54:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: e017f4fb51567305a374754b56e3cb46 SHA-1: 1e82f807214e0325dd81b7f15555511c2c49e924 SHA-256: b8c15284a14208965180d223df0c40ccf174c9a3d39a55e475d7de14ecde44c0
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://ttraff.me/123?keyword=path+analysis+glm In PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/8709547.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5f8b663d6065e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375525/normal_5f8fc501c35c0.pdfIn PDF document text
    • https://fisutogu.weebly.com/uploads/1/3/4/4/134448223/291907.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/d5061cd01d4ed8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407781/normal_5fa20b7b16a2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410703/normal_5f9ad45d721f7.pdfIn PDF document text
    • https://bagolisenavela.weebly.com/uploads/1/3/4/4/134496394/rawazalovafofito.pdfIn PDF document text
    • https://sowubewakojanit.weebly.com/uploads/1/3/4/3/134348505/179513.pdfIn PDF document text
    • https://berajuvexoru.weebly.com/uploads/1/3/1/8/131860787/9706216.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f8a33be281d3.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007d8b.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007d8b.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off0000b62d.bin)
    • https://uploads.strikinglycdn.com/files/14bb6743-16a7-46e4-a0b4-b2c231109176/zezitisoxamixagigepipobu.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/21685054910.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8450/5778/files/jet_preformance_chips.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/gospel_of_barnabas.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 extracted file (font_00_sfnt_off00007d8b.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8B 4664 bytes
SHA-256: f165502505ed5013c2abb233c932f99d7f8b7f1bffba9cafd6b6422d808b3715
font_01_sfnt_off00008d27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D27 12284 bytes
SHA-256: c08ecd507b5792f43338a566511582386905539a6515710b9f52dc0f7e6815d2
font_02_sfnt_off0000b62d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB62D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176