Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce19e921593102eb…

MALICIOUS

PDF

44.3 KB Created: 2020-10-16 09:22:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 7c033a074b4a4fc55b7b3ced0549acc8 SHA-1: 00eba45b454171704dd008866a98981ca557aa80 SHA-256: ce19e921593102eb99de1137fabdcd837633d518d02a83580d33ac8a76ff954a
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://ggtraff.ru/strik?keyword=friedrich+nietzsche+genealogy+of+morals+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366630/normal_5f87314fabd22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f874afcc3f00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367646/normal_5f8838dfa0420.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f8732512efad.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/tunitulo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370059/normal_5f88d91b4e53d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371261/normal_5f88bd14af045.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5f87e272ce7b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366632/normal_5f883975423d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_5f88edbc7fdec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5f86f8ec77e7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369775/normal_5f893a929cec7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368955/normal_5f88d1a8d37ed.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/dowixipadutume.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/5058540.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/7965/1494/files/75353416792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9512/1301/files/audi_mmi_update_free_download.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_off00006e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E36 5676 bytes
SHA-256: d282b5a8db064e4d6acf0f1bb16f5d2a628a43bc6cb097e7f929a753a4e06946
font_01_sfnt_off00008164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8164 10072 bytes
SHA-256: 063b9f0e6eb36adf02e8a1a933f4f17358c09b3c200b20eb2a3c76965491e818

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