Malicious PDF — malware analysis report

Static analysis result for SHA-256 941b6c63b32656c3…

MALICIOUS

PDF

43.7 KB Created: 2020-11-04 04:15:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-12
MD5: 6b490e851b0287102f97130f6351f32b SHA-1: 7ffdcf5d3fafef996c62e7ed501a4ce6346fae92 SHA-256: 941b6c63b32656c379cc12dd2dc0c0d76276771e68f01e463ca964ecae35fe37
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cctraff.ru/wb?keyword=cameron%20appraisal%20district%20tx In PDF document text
    • https://cdn-cms.f-static.net/uploads/4418192/normal_5f997317df2d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378405/normal_5f8bf11cabc01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420438/normal_5f9e9598d6195.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447436/normal_5fa1e42974f96.pdfIn PDF document text
    • https://funovupudejo.weebly.com/uploads/1/3/4/4/134473131/500475.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f8e94eea1247.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5f8abbf8e14b7.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/banula/62320613515.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/accursed_share_bataille.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/anemia_ferropenica_durante_el_embarazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54cd6a2f-7419-4871-99cc-1fd0050990e9/mezimagejusi.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/sasozupijiwosapevosokit.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/free_fake_texting_online.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/53722511057.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/71644022940.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_off00006a97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A97 5192 bytes
SHA-256: cafe2169d1cf8f1d7bb68240c8664497688beb487491fc2db912ea32aa52d1d8
font_01_sfnt_off00007c24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C24 11012 bytes
SHA-256: 20718df1a3b16a1dcebe8f541fe7e9fca63ce5d84a98caa5b4cc70e76eda52a7