Malicious PDF — malware analysis report

Static analysis result for SHA-256 daf325a41c80209b…

MALICIOUS

PDF

53.6 KB Created: 2020-11-08 12:20:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: dd14c9c4025e07eadc1d109336b218a0 SHA-1: 8aa4d5afb2e29a9eec8c449369ca261290ddf491 SHA-256: daf325a41c80209ba8123a5cf3bae34fac61104c33c186884e2dd547c57faab4
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://traffking.ru/aws?keyword=do+fungi+cells+have+a+cell+membrane In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369150/normal_5f925cf4e6c57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387562/normal_5f95696fa2708.pdfIn PDF document text
    • https://lodovanu.weebly.com/uploads/1/3/4/4/134403978/mozebezigetegukeguve.pdfIn PDF document text
    • https://kizekusoviwo.weebly.com/uploads/1/3/1/4/131453028/044dfdd0190b5a1.pdfIn PDF document text
    • https://rinobawafikukew.weebly.com/uploads/1/3/4/5/134583240/957308.pdfIn PDF document text
    • https://keregejuvuja.weebly.com/uploads/1/3/4/3/134345288/058139276c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387428/normal_5f9a9f969008a.pdfIn PDF document text
    • https://kupugaxome.weebly.com/uploads/1/3/0/9/130969415/wuxifabasogamorodugo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://tinogive.files.wordpress.com/2020/11/66331523885.pdfIn PDF document text
    • https://siriwenezoz.files.wordpress.com/2020/11/buwififekezugakebul.pdfIn PDF document text
    • https://napabilurer.files.wordpress.com/2020/11/19156447687.pdfIn PDF document text
    • https://bagiwes.files.wordpress.com/2020/11/library_information_ielts_listening_test_answers.pdfIn PDF document text
    • https://monusiz.files.wordpress.com/2020/11/wv_civil_service_test_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/lusegomusero.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_off00009390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9390 5492 bytes
SHA-256: 7ed8bbb65e57d0fffee69a9c6d100fed1559e04fbe1e182f3a180721eba1a598
font_01_sfnt_off0000a630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA630 10276 bytes
SHA-256: 1544839ee7aa46c8c10e9e287accb7008f6423ea3e66db957ecd156c499706c4