Malicious PDF — malware analysis report

Static analysis result for SHA-256 63eef7578fa452b3…

MALICIOUS

PDF

46.4 KB Created: 2020-10-04 00:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9fa1d533616beca5928710504ead0090 SHA-1: 6c66f693bdf0ba1a26f51427620e250a5cdafbe4 SHA-256: 63eef7578fa452b33219787d0f477cbd5b76da164770acd7a75548e16a6a334b
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=taylormade+m3+driver+adjustment+instructions In PDF document text
    • https://site-1042007.mozfiles.com/files/1042007/daxixajeresenuwofo.pdfIn PDF document text
    • https://site-1037212.mozfiles.com/files/1037212/rurabenoloxezubus.pdfIn PDF document text
    • http://files.agorapublications.net/uploads/1/3/2/6/132682570/4da5af8.pdfIn PDF document text
    • http://files.mpvtbk.com/uploads/1/3/1/3/131398461/8627162.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/1/0436/4907/3312/files/best_idle_games_2018_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7237/1350/files/xebin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6710/8247/files/kasetujuferatalozekezol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6041/0021/files/chapter_7_the_nervous_system_test_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae1da80e-032d-4fa0-98ab-c785d404d8be/66405714752.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df44a8e7-1e14-4906-8c6a-25e3e5c8352b/vepojewukifevire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15a70119-4e31-4f49-bf33-68e3151d5684/88929162971.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9da286e1-13e5-4218-aa83-9bbf0fe3bcd3/nisokelirirunotetejuve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/095da94d-5530-4e68-bdf3-3b61c6ebf348/21990519587.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_off00007855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7855 5436 bytes
SHA-256: 5783e4e1343373d93729d3951935026bb5670059530431c8331f73dfea621542
font_01_sfnt_off00008acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ACD 9872 bytes
SHA-256: 43b0d0f583087af3066442f9d59a23050d97d44c37c830e0f5a561a872a2c967

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