Malicious PDF — malware analysis report

Static analysis result for SHA-256 465878b640e8cdae…

MALICIOUS

PDF

40.3 KB Created: 2020-10-30 01:42:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 8c06c756628055fa9d04462b4a742992 SHA-1: ec0eee0249b2e828ed6e49e255f332e492d7ff17 SHA-256: 465878b640e8cdaec7ff76124700d1ae848327aeb2abfe9cb1178a62962deb9d
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.link/pify?keyword=wood+stove+fan+tractor+supply In PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/9945460.pdfIn PDF document text
    • https://buranujepexu.weebly.com/uploads/1/3/4/3/134339299/regovuxidujinixeram.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006031.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006031.bin)
    • https://s3.amazonaws.com/zesotat/ahriman_40k.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/electricity_vocabulary_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/58932034354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d27c704-3322-4e0d-9418-7209b8e39662/8295755292.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/wozojosifisa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/156380c8-2727-4949-80f5-6514789ccd97/soxojomoxuzepuruvegimol.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/catalogo_boticario_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/23490850241.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/casio_g_shock_5255_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/canny_edge_detection.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/lolisofisejufibiwitatura.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 extracted file (font_00_sfnt_off00006031.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6031 5324 bytes
SHA-256: b655d6aa7f24938c1edb78720f0eaa9a6bd27d66efe74bd2a1094c5d03efb758
font_01_sfnt_off00007279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7279 10020 bytes
SHA-256: 793e52a6423e24a8e75c11e7ef64bb0b0d85aeb5169cbebd3c154bc6c508dcf6