Malicious PDF — malware analysis report

Static analysis result for SHA-256 844dde35ccf354cc…

MALICIOUS

PDF

35.5 KB Created: 2020-11-05 19:47:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 3604df82e921bd3613849267c406fd38 SHA-1: 12920720b7268ebdfe4450d1dff2e26775324708 SHA-256: 844dde35ccf354cc7c7f6e3de0bc9250fbefe6ebe9cca3df9d68d75b43fd1a5c
134 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.
  • 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://traffking.ru/strik?keyword=lyrics+to+good+morning+sunshine+from+hair In PDF document text
    • https://pirovosarelivo.weebly.com/uploads/1/3/1/4/131406751/kudodokiretidu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378607/normal_5f9e309fc0aac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459188/normal_5fa39ce82b0c2.pdfIn PDF document text
    • https://zezexofoji.weebly.com/uploads/1/3/4/3/134344156/67cfc0b62d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376625/normal_5f8f4c7f3a7a9.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/9384386.pdfIn PDF document text
    • https://figotuzu.weebly.com/uploads/1/3/4/5/134579221/8480627.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/najubu/newudunepalo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4055aeeb-c19b-47cc-b92f-4f9bb2623274/jareb.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/lowimaliwegof.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/52594641775.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_off00004987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4987 5448 bytes
SHA-256: dc34a1ba87c59d4a9152b1b869e2b0651bee77e5bf207f500df52b4cb7974069
font_01_sfnt_off00005bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF0 11628 bytes
SHA-256: 11ded1fb645956788b9d74fc46e6d1467b1f1d57128d64e2601d5080be7aea69