Malicious PDF — malware analysis report

Static analysis result for SHA-256 4be5ce857ff55b4d…

MALICIOUS

PDF

56.0 KB Created: 2020-09-30 05:30:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 428c9a99bc33e1b25ce1fde3e3541a0a SHA-1: 680c4ec8122c6684b784fe15bdddc7c5263f387f SHA-256: 4be5ce857ff55b4dae6d7f32081f2d894c18a42c297fd37b2f42cf59c347401f
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://ggtraff.ru/strik?keyword=geometric+sequence+sum+formula+pdf In PDF document text
    • https://site-1036973.mozfiles.com/files/1036973/45593763059.pdfIn PDF document text
    • https://site-1037893.mozfiles.com/files/1037893/vijerufaviz.pdfIn PDF document text
    • https://site-1037074.mozfiles.com/files/1037074/22458983249.pdfIn PDF document text
    • https://site-1036679.mozfiles.com/files/1036679/33195984091.pdfIn PDF document text
    • https://site-1036872.mozfiles.com/files/1036872/88161209571.pdfIn PDF document text
    • http://files.ltlfitness.net/uploads/1/3/0/7/130775735/0910086e.pdfIn PDF document text
    • http://wemut.movequickly.eu/uploads/1/3/1/6/131607062/goxudi.pdfIn PDF document text
    • http://files.mylakehillsreserve.com/uploads/1/3/0/7/130739535/ramavi_sibori.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4447/0933/files/keten.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7745/9363/files/warizoboduloxaju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8734/7360/files/xumufupaxuzon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0979/4463/files/vegexatekuvap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48054684450.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1583/0695/files/precision_machining_technology_2nd_edition_workbook_answers.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000084a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A8 5340 bytes
SHA-256: 9be74684fd09cb2678851e23ea9b0ae14c229403010d43398bf9c9a92289f058
font_01_sfnt_off000096ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96BA 15052 bytes
SHA-256: f383fdf29b36b337e22a2d0fc4517faea249a2493441e8e326e1edc972d1158f
font_02_sfnt_off0000c530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC530 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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