Malicious PDF — malware analysis report

Static analysis result for SHA-256 879108d8ad022d28…

MALICIOUS

PDF

46.9 KB Created: 2020-11-09 11:57:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 02b6472f7e1a8859f823bb358bbf3625 SHA-1: 185f4bd443fff7d2821f8f9c8a4ec8fbeed3b812 SHA-256: 879108d8ad022d28bcdc1022dc33c7a446a6c4a159caacda7afffe3fad1762b0
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=the+narcissist+next+door+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387709/normal_5f9d5b0c61468.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5f8b117f06820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393637/normal_5fa73fd8f0f10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_5f93da9df043c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401716/normal_5f9d236dc5c4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365576/normal_5f949f47cc7c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389361/normal_5fa815ac6d3a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412575/normal_5f98befbe4969.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368469/normal_5f87a8c413b02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407989/normal_5f9c167e73494.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373788/normal_5f9145f7505f1.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/nijudow/dupadulivupomubawon.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/tedibavadigilekixefupon.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/lutozeninameb.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/parent_sign_in_sheet_for_back_to_school_night.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/run_on_and_fragment_sentences_worksheet.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_off0000797f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x797F 5228 bytes
SHA-256: 50c049a2ac42944b2c4067e28d1c8732ab574c332d06bd919044da60148f48a9
font_01_sfnt_off00008b46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B46 10260 bytes
SHA-256: 636117432fb01e345da54983c62edd6bf7bb04506dda792423919e3f90be01cb