Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb0d2b861b26fe9d…

MALICIOUS

PDF

50.0 KB Created: 2020-11-08 00:03:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 1b23cd928fc6aaa1cb54568b468617f9 SHA-1: 0c60230c84361bc975d5275398e7b4f63049021e SHA-256: cb0d2b861b26fe9dec3251f11e6c24abc7f08112bc42df04b7104cb99c48cef8
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://traffking.ru/123?keyword=ge+profile+oven+manual+self+cleaning In PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/bekalan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427077/normal_5fa2107e81dea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369161/normal_5f9056d734d20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382186/normal_5f8dc176ac9bd.pdfIn PDF document text
    • https://kutepazibug.weebly.com/uploads/1/3/4/4/134477769/zimofixibu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393044/normal_5f9339b903df2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451206/normal_5fa1fc409e1ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367007/normal_5f87b6e59b38b.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/ketese.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/jovekus/windows_media_downloader_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/illustrator_save_small_size.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_off00008097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8097 5428 bytes
SHA-256: c83de5c8d05241fcb851958e01ad7a0872edd169410eb57910a64802dc76a8bb
font_01_sfnt_off00009301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9301 11796 bytes
SHA-256: e147f778a6a808f02626a8ba3be28fd09d2f9bc776cb743ea1baf2ff439c2fb6