Malicious PDF — malware analysis report

Static analysis result for SHA-256 89205be056234d30…

MALICIOUS

PDF

47.9 KB Created: 2020-11-05 20:21:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: cb6adb27f9bbe2b636ba5970e951f81a SHA-1: 90e049c3423dc12f650be6b2220e676a778e53e8 SHA-256: 89205be056234d30b81b68a04c21869178f542a1aad4c1f1ddac63a934d59469
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://traffine.ru/123?keyword=duck+life+4+cheats In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390681/normal_5f992cc6b8cbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381102/normal_5f9b8d319ef36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368772/normal_5f8bc5ea74fe7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f95373924caa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f89f1c14d902.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375210/normal_5f90aad1362a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405181/normal_5fa3ce7f31f0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455387/normal_5fa00e0a545df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384152/normal_5f8ea55820593.pdfIn PDF document text
    • https://zavamemedu.weebly.com/uploads/1/3/4/3/134305249/lorabinidazenozaw.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/gogonof/41683602388.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/mironuponosidugotaze.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/el_nuevo_cine_mexicano.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_off000076b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76B2 5024 bytes
SHA-256: 557d94bd3ee696ab640d734f9d81bb82f38a0dda5b9a2f82f8bea67f102099e5
font_01_sfnt_off000087de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87DE 12768 bytes
SHA-256: 8dfd6c81697b507e25a3a09e0779adf62afbd2dc8c4836b5bbc18bdf7a4072cf