Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bb38bdb72384b98…

MALICIOUS

PDF

52.0 KB Created: 2020-09-30 21:58:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: d3e24c64fd243bf8e9ccb16ce9e3b917 SHA-1: 83e8eed30e089149e5167a6cd0b1593e61c440ff SHA-256: 7bb38bdb72384b985c01cd25280a27ddd22c4b007ec09f2c7a48b8bcf1a4ce55
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://cctraff.ru/strik?keyword=le+fabuleux+destin+d%2527+am%25C3%25A9lie+poulain+piano+pdf In PDF document text
    • https://site-1037215.mozfiles.com/files/1037215/18353132390.pdfIn PDF document text
    • https://site-1037145.mozfiles.com/files/1037145/bavelejul.pdfIn PDF document text
    • https://site-1036956.mozfiles.com/files/1036956/tupipox.pdfIn PDF document text
    • https://site-1036879.mozfiles.com/files/1036879/suzil.pdfIn PDF document text
    • https://site-1037022.mozfiles.com/files/1037022/3558737667.pdfIn PDF document text
    • https://site-1036697.mozfiles.com/files/1036697/68389498678.pdfIn PDF document text
    • https://site-1036744.mozfiles.com/files/1036744/sajurewavupapipito.pdfIn PDF document text
    • https://site-1038492.mozfiles.com/files/1038492/fufukogam.pdfIn PDF document text
    • http://gufabanu.letsgetlegalnz.com/uploads/1/3/2/7/132740764/6448497.pdfIn PDF document text
    • http://vakonow.doublejoutfittersny.com/uploads/1/3/1/6/131606271/2717341.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/79905cd9-ceed-4f70-97c8-077b4cb0314f/84421255300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27deffe7-fb9d-41f1-bab0-c4a949ae0106/fijatimikebudubegesud.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_off0000862a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x862A 5416 bytes
SHA-256: ab9678ee880ba430fe9286371981f1a9ec0d84a513bcfde990cbe1b4e172e709
font_01_sfnt_off0000984d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x984D 13164 bytes
SHA-256: cc33544b1d03490dddbc6c20b8670b269ab404a0fe9811815f2beb151f2dcdd0