Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b7b9b25125cdc96…

MALICIOUS

PDF

44.2 KB Created: 2020-11-09 12:38:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: ba9bca51de4da7ef614df07e079b6a68 SHA-1: af3584df6befd1f238414fa2eff1b6b28daf3360 SHA-256: 5b7b9b25125cdc9665c252bf23c8e1763295b5f5f71680193d3686fff8a00391
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/123?keyword=kingdom+hearts+level+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381752/normal_5f8c6c7ddd348.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/d5cc8.pdfIn PDF document text
    • https://xazojitov.weebly.com/uploads/1/3/1/4/131408465/d49d6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f8e86dc3ab9c.pdfIn PDF document text
    • https://jomitapekox.weebly.com/uploads/1/3/4/3/134319499/nagexaxerusutibe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369932/normal_5f9ebdbb16492.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380871/normal_5f8f6608ef6bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384164/normal_5f9a4cb8bb837.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382631/normal_5f98fd06781ca.pdfIn PDF document text
    • https://fofafobef.weebly.com/uploads/1/3/4/3/134349457/kofirivigokod.pdfIn PDF document text
    • https://falibapop.weebly.com/uploads/1/3/3/9/133997194/3df70733fe7ceb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449965/normal_5fa0d9777f165.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/satudifin/13066571638.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A9 5152 bytes
SHA-256: 927324caee26fdd24322163d07a259dba84a628d0b0e4b80c16d7459eca8e3af
font_01_sfnt_off000073fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73FA 10036 bytes
SHA-256: 1d0aa3a2826b189277a3c044e82b8684718f71b5f37b946864587943d9ac6f62
font_02_sfnt_off00009651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9651 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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