Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cb8299becea6499…

MALICIOUS

PDF

34.6 KB Created: 2020-10-01 23:35:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6ff26f4b60e00bbfce59399070c300aa SHA-1: eafc6e0488e620bd3e4cc52b9cb867a43b2483b1 SHA-256: 5cb8299becea6499975b2b79b4ac1b955605bbebddb10104263ade0b3eb42a16
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.me/pify?keyword=goodgame+empire+hack+rubies In PDF document text
    • http://files.0926065789.com/uploads/1/3/1/1/131164157/7545284.pdfIn PDF document text
    • http://files.karleekilker.com/uploads/1/3/0/7/130775746/zewoka-bosovolafu-sugusa.pdfIn PDF document text
    • http://files.chriskernutt.com/uploads/1/3/1/4/131407918/fopekotobexezexum.pdfIn PDF document text
    • https://site-1037212.mozfiles.com/files/1037212/71644851344.pdfIn PDF document text
    • https://site-1036946.mozfiles.com/files/1036946/4176222231.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/1/0432/7669/7760/files/extra_torrent_unblock_all.org.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3976/9254/files/fuxotabozuwakise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4302833a-f1d5-4896-87f4-ced08a87a7a2/bavanatixusararevokew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1649bf97-7e00-4df6-8e25-db7af89c8e0c/gixikudafut.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_off000047f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47F3 5688 bytes
SHA-256: 868146c360d69f0a1fbe9b667abb4abae138d1f760b11e712b468794c4f01d1c
font_01_sfnt_off00005b1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B1E 10196 bytes
SHA-256: f955243cd6d16b5d6077d5c9000cb4bb9d1eaa6cf5d6715c1c40e97789f67dbe