Malicious PDF — malware analysis report

Static analysis result for SHA-256 6625a5d7028c3fbd…

MALICIOUS

PDF

40.0 KB Created: 2020-11-01 03:20:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: fbf5bff02e02278cc9a650cba5ec9713 SHA-1: e5a7d175cffcfb371947cbc26b4fbfc3201cd0b9 SHA-256: 6625a5d7028c3fbd56f90d5794b4239f815d6e3541a96fe91637dcca08ffb478
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://ttraff.cc/123?keyword=cataclysm+leatherworking+guide In PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/zerovawegoselededu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369150/normal_5f89dbddd4a3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416672/normal_5f98f6c642903.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370542/normal_5f8948810e4cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377908/normal_5f9a23b885f9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374175/normal_5f9e08e382d46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373304/normal_5f9aba494eaaf.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/829423cf-655a-4904-a6f9-1d23974dd9be/dogez.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/dekogale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d827767-6d68-4a36-8106-c1ff03f79eae/duluwa.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/hangin_tree_cowdog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b57e55c7-b11a-4939-a575-1fcc8d3beffd/rujituguduxulepun.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_off00005e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E11 5516 bytes
SHA-256: ce3ad27552ad571a3f1878c09d4e6c89088e30ad08ce7f85f408e6fe0c85aea6
font_01_sfnt_off000070ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70BA 10224 bytes
SHA-256: 86c2f04f37bc0cd92b0fac9ed720b2db9e826e7403fd6a371efefc4a638e72f2