Malicious PDF — malware analysis report

Static analysis result for SHA-256 15ab88324f6869b6…

MALICIOUS

PDF

41.2 KB Created: 2020-10-03 21:20:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0d80043f27d5d19124d5e1e2d9b7b833 SHA-1: 8087e41a41caaacf8f05abdf1ae29870cd857269 SHA-256: 15ab88324f6869b6904604f68f3faf9c6d01d57735d8c49f034f2f9e60991267
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://ggtraff.ru/strik?keyword=adobe+illustrator+cs6+classroom+in+a+book In PDF document text
    • https://site-1037204.mozfiles.com/files/1037204/ginibegenijuf.pdfIn PDF document text
    • https://site-1036745.mozfiles.com/files/1036745/41498640769.pdfIn PDF document text
    • https://site-1036698.mozfiles.com/files/1036698/58833105332.pdfIn PDF document text
    • https://site-1038971.mozfiles.com/files/1038971/nomosezuxosogosezorovebuk.pdfIn PDF document text
    • https://site-1042547.mozfiles.com/files/1042547/ligojalev.pdfIn PDF document text
    • http://wevetol.holmesinsurance.net/uploads/1/3/2/6/132682711/e55ea26327e6.pdfIn PDF document text
    • http://files.willemhendrikse.com/uploads/1/3/0/9/130970015/6eaaf80c8.pdfIn PDF document text
    • https://site-1039806.mozfiles.com/files/1039806/76269859559.pdfIn PDF document text
    • https://site-1036743.mozfiles.com/files/1036743/wipotosojosuzoferunifiwor.pdfIn PDF document text
    • https://site-1040210.mozfiles.com/files/1040210/jimejumonelenevunes.pdfIn PDF document text
    • https://site-1039167.mozfiles.com/files/1039167/25054455564.pdfIn PDF document text
    • https://site-1038614.mozfiles.com/files/1038614/84594441780.pdfIn PDF document text
    • https://site-1037029.mozfiles.com/files/1037029/58538216945.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000060d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D6 5432 bytes
SHA-256: 6f0ae60f01513875b6f28c066cc16d60a2c9b9e5ae407c0f8a54303bd9e04b16
font_01_sfnt_off00007336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7336 10980 bytes
SHA-256: bf61fba80cee16c1ae32216b12197732ef9f8818ed166ace1ec215ddba7bae28