Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba051aee0ef5a6c…

MALICIOUS

PDF

52.9 KB Created: 2020-11-09 10:50:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 6ecb595b4d5f2d731e8c66fe5d03570c SHA-1: d350d3b1feba2b67db570b215466421c0ff31e6d SHA-256: eba051aee0ef5a6ca68b1bf45ce83ffa082ad9ec4d8017a7f2a32d18ae838ed8
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/123?keyword=weis+fire+apparatus In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367923/normal_5f8b4c068baf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368950/normal_5f89ac91b343b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bedaxabop.files.wordpress.com/2020/11/redaniraledaxabonogitej.pdfIn PDF document text
    • https://sebuwisawos.files.wordpress.com/2020/11/fipupojuretis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b82c0f72-98d2-4473-8000-709a864c8dfa/7009123307.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41d91f54-ebe6-413e-815a-44d2af3df0cc/pipevuke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c49f8bee-fa59-4b20-be13-20cb756dfb80/55528840092.pdfIn PDF document text
    • https://bipudez899175850.files.wordpress.com/2020/11/54938814407.pdfIn PDF document text
    • https://kenaribik.files.wordpress.com/2020/11/80592271129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fec53d8-48e2-45fa-b220-68cf14946f1a/dirty_text_messages_while_hes_at_work.pdfIn PDF document text
    • https://najetuvi.files.wordpress.com/2020/11/kirke_madeline_miller.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_off0000902a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x902A 4876 bytes
SHA-256: f0b1c3cd1e9cbbc575b4ed8613d14f71fa47c99124d73edac22a410b4a961722
font_01_sfnt_off0000a0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0DF 11344 bytes
SHA-256: 1e79775bde6d2e552826720c89f2d308af5b70b7c7dfdea6c8c93cb9d2d5e511