Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebfb3dda9b4b8b49…

MALICIOUS

PDF

40.3 KB Created: 2020-10-06 20:59:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 94d04ddeb50556342fcee850e9a1b0ea SHA-1: fd6d8bccd3348068306c1cf0908c54662a4b2664 SHA-256: ebfb3dda9b4b8b49a449a61883d88da7f41b31ec5bb3b42c80fc663ed4111797
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://cctraff.ru/strik?keyword=adobe+premiere+pro+cc+2015+classroom+in+a+book+lesson+files In PDF document text
    • http://files.companionsnotlivestock.org/uploads/1/3/1/6/131606177/3460556.pdfIn PDF document text
    • http://muputapak.marinerspoint.com/uploads/1/3/0/7/130776760/manewud.pdfIn PDF document text
    • http://xevix.rickyfrank.com/uploads/1/3/1/3/131381675/4104755.pdfIn PDF document text
    • http://dosipi.teatimeessentials.com/uploads/1/3/2/8/132814930/ripexid.pdfIn PDF document text
    • http://zikojana.speckmath.net/uploads/1/3/1/4/131482952/wubuwoziwoxe-jabazivunopana.pdfIn PDF document text
    • http://files.sakonnetlighthouse.org/uploads/1/3/2/7/132712119/wotogegowuzepoxomen.pdfIn PDF document text
    • http://sonetuzoj.beesaliveclub.org/uploads/1/3/0/7/130775291/f48de789916356.pdfIn PDF document text
    • http://files.adelanteawards.com/uploads/1/3/1/6/131606275/rotiremuja_xaxel_rujibudor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/cb514b58-7fc2-48fa-a34e-83da82aae150/38790126854.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33024810-6d0b-4d4b-8578-28d53e50a81f/28100620216.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43bf50b1-5ac5-463f-ae1d-f9eb8f9cdbed/fotajixig.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5043 5652 bytes
SHA-256: a8f5796c09e48cae28be96a29d0fb7c8cb9fae7a6f7e44c31dc25d23e34833e2
font_01_sfnt_off0000635c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x635C 10064 bytes
SHA-256: 17cdf56865870d39ef39ce30cc928311b796babafc615331d8a3cd5ea5986a0b
font_02_sfnt_off000085c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85C3 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230