Malicious PDF — malware analysis report

Static analysis result for SHA-256 c94eda9886df6992…

MALICIOUS

PDF

39.0 KB Created: 2020-08-25 19:17:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 01fdfb0179a11288133024678f5e91f3 SHA-1: 2dbe1b274129c127d10f6b109be37ef86eaedaf2 SHA-256: c94eda9886df699261768772913940f255d15a9ec12a45b654ff60c40fef56ca
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://ttraff.cc/pify?keyword=list+of+common+similes+and+metaphors+pdf In PDF document text
    • http://kepapev.aeherting.com/uploads/1/3/2/7/132710621/nofej.pdfIn PDF document text
    • http://files.cutfootsiouxresort.com/uploads/1/3/1/8/131858791/mageve.pdfIn PDF document text
    • http://files.thecenterforhopeif.com/uploads/1/3/0/8/130873922/suxix.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/1/0432/9259/0236/files/alveolar_sounds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9505/5777/files/munaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3300/9047/files/74750938010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7872/8345/files/ms_sql_server_2014_for_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9862/8501/files/pofabaderaratiwunam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3330/4986/files/minecraft_apk_0._13._0.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6886/6212/files/favazewuxus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2697/9739/files/php_and_android_developer_jobs_in_indore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3712/1951/files/duracell_alkaline_batteries_sds_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3876/8294/files/how_to_dark_new_tab_search.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_off00005c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C7B 5336 bytes
SHA-256: 5e3e3f29af4a8ba16c921115a9cc80f23c4906742460229851fc7cbed4ffb345
font_01_sfnt_off00006e6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6D 9732 bytes
SHA-256: 2223ca9520b38cb08ecd12f0895b77d5fce5d9962dd72e7717ae082ff879da4f