Malicious PDF — malware analysis report

Static analysis result for SHA-256 8083cdd979906791…

MALICIOUS

PDF

45.2 KB Created: 2020-11-07 04:49:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: b1505556ec46798901d063b07981d5d0 SHA-1: 6b795b24763fb08fdbd35fb18b934eac050d17f2 SHA-256: 8083cdd979906791623f8c92307fc9cee2f03d281286dc806929d29aa4ee1185
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://traffking.ru/123?keyword=are+uggs+shatnez In PDF document text
    • https://fufivivol.weebly.com/uploads/1/3/0/8/130873849/zafeb-tikugi-tuvopafi.pdfIn PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/8fd11da9ddc9.pdfIn PDF document text
    • https://pazolumaf.weebly.com/uploads/1/3/4/3/134356568/f92a146a803f45.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/7922058.pdfIn PDF document text
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/9544537.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/solonebosop/91120483697.pdfIn PDF document text
    • https://napabilurer.files.wordpress.com/2020/11/19156447687.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/21092675412.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/sjsu_spring_2020_class_schedule.pdfIn PDF document text
    • https://pidenus.files.wordpress.com/2020/11/wuzurux.pdfIn PDF document text
    • https://sebuwisawos.files.wordpress.com/2020/11/fipupojuretis.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_off0000709d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x709D 4956 bytes
SHA-256: aef09f5b8c739f5af1ac3921d5f7b89be138764a03d62943e3655d17c8a8c224
font_01_sfnt_off0000817e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x817E 11472 bytes
SHA-256: fa0754fa26b91e442631acdf0d370533428346d2e15b472df8dc85cd6eb7166d