Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc764739df1c6187…

MALICIOUS

PDF

39.5 KB Created: 2020-09-11 08:01:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f864812e2fd6a3af625a00081ca30710 SHA-1: d4a202de97234fdecce24134a8d969082ae9cbd8 SHA-256: cc764739df1c618752e96a333a639c6753dda10a4245a5a7447bb3c08b94c399
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.club/pify?keyword=bell+cooling+tower+catalogue+pdf In PDF document text
    • http://files.heritagecondolascruces.org/uploads/1/3/0/7/130739590/potigenutowa.pdfIn PDF document text
    • http://gutasak.bigwatervista.com/uploads/1/3/0/7/130776485/29e0df13af01b3f.pdfIn PDF document text
    • http://files.jackienorman.com/uploads/1/3/1/8/131860787/xewaguxevaxo_xarak.pdfIn PDF document text
    • http://sigaj.origin-of-religion.com/uploads/1/3/0/9/130969336/2027843.pdfIn PDF document text
    • http://files.harveyjettmusic.com/uploads/1/3/1/4/131453053/b649b.pdfIn PDF document text
    • http://gimojaso.dramseyassociates.com/uploads/1/3/1/4/131408899/cd31955f700.pdfIn PDF document text
    • http://lavibe.therapeutictouchnj.com/uploads/1/3/1/3/131379510/wokomuwowe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/5cf23b_a5de134974be48bfb0e724efbe03f7bc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f459ea_bd5430edf6a5408496256afaba9bf02c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3de8a6_a1e2bfa515a84300b86050d9ee0c5242.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b52961_8b630dfb9b44441b9f30e0c242865433.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bbd3cf_7b742fb6b59b4ba780c2586e3ed4e6a1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/338562_634929ab84fa40e382ca87cce402d5d3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3ce946_268e5ccaeb41405daac202366c5300f7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f65175_be32a22ce6c444ad8d28d1717f843e43.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_c2931eb0f4b647fc8cead60f5e2cafda.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cec570_ee8e783bf4904856987e1fdc7dff2ab2.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_off00005cf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF2 5284 bytes
SHA-256: 3a8daeefddc98aab965fd4ac5fcd69d69841e281bcde4eed77185d4db6a484bd
font_01_sfnt_off00006f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F11 9816 bytes
SHA-256: 0d3805b7f2f3591b5fb910c1f891f84bb98cffa8a31da2f565a7a639851f79f6

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