Malicious PDF — malware analysis report

Static analysis result for SHA-256 339b19ee9aea7051…

MALICIOUS

PDF

40.7 KB Created: 2020-11-06 06:01:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 08db876eae0a867fcb6741ae70e39ea3 SHA-1: cb23c6ab1750c78c45023405012872facb02a539 SHA-256: 339b19ee9aea70516b2d28a73ff4cbf340c1dee3e2a2400ee3d3c2590ca006a3
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=capitulo+5a+answer+key+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372073/normal_5f9cc0c92fbc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464735/normal_5fa4bad23440c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374009/normal_5fa03fed8ffb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404290/normal_5f9fdadfafc3f.pdfIn PDF document text
    • https://vesalitekaso.weebly.com/uploads/1/3/4/3/134314643/bovem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421333/normal_5f9c77a98cd81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377381/normal_5f9357690bb47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385435/normal_5f91f926a3fe7.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/pusolefosex/linking_verb_worksheets_with_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1ed40d5-1a7f-4593-bfa5-39d1893900f0/jesebuvajugeto.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/tanudap.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/julesadixetagobisav.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_off00005ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED0 5324 bytes
SHA-256: c9a59627d976f00dbeb3b752c0c8a46ed31dcd56dddc390d148fc66602e3033c
font_01_sfnt_off00007115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7115 10936 bytes
SHA-256: 70fedd9dfe0bea28a591d93315be213b16c8dbbdd4f877a426cddd81e14522c6