Malicious PDF — malware analysis report

Static analysis result for SHA-256 29d9d658103f1a79…

MALICIOUS

PDF

51.0 KB Created: 2020-10-02 01:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 22267bfe49a4dadcde4d009daf563f87 SHA-1: 666da7b0b1a7c6907de1e4632d6b5f16cb314ea8 SHA-256: 29d9d658103f1a796660df526aa01ef91a49a7f96ad3d3b73ceb5041d6aff3fb
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://cctraff.ru/strik?keyword=aldi+situational+judgment+test+answers In PDF document text
    • http://files.schorcounseling.com/uploads/1/3/1/4/131407435/2958954.pdfIn PDF document text
    • http://files.clarevet.com/uploads/1/3/0/8/130813747/xadivimovoz.pdfIn PDF document text
    • http://files.michaelhisamoto.com/uploads/1/3/1/4/131483955/4889177.pdfIn PDF document text
    • http://files.cmepto.org/uploads/1/3/0/7/130775939/627086.pdfIn PDF document text
    • http://files.hurlyvaleprimary.co.za/uploads/1/3/1/4/131438825/tamebum.pdfIn PDF document text
    • https://site-1037887.mozfiles.com/files/1037887/48729210167.pdfIn PDF document text
    • https://site-1036742.mozfiles.com/files/1036742/19429496815.pdfIn PDF document text
    • https://site-1037193.mozfiles.com/files/1037193/28640578948.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/1/0480/9326/6074/files/sogedudamusoxipomugulotex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0234/6148/files/mozalaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3329/7058/files/80648982330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8820/7255/files/the_diamond_of_darkhold_ending.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2257/6548/files/kotoja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9845/5705/files/57411766073.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/bipuxinedajusonuru.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_off0000889b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x889B 5300 bytes
SHA-256: 963042a6fea69ea99596953151e81f5a4565d3acd833a9119e4e3a3b1fb38f65
font_01_sfnt_off00009a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A9D 10716 bytes
SHA-256: 0dd91d6a0b38427a6bc0d0637101355a7e5b554cb58f78015955b42573eb0cbd

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