Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce2992268f40be23…

MALICIOUS

PDF

54.5 KB Created: 2020-10-09 18:24:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 57223a514d2baca2e5f5cb7f59cc9be7 SHA-1: 668086bd367e672023feb710e0ef002f04dfccb2 SHA-256: ce2992268f40be237df000f9042ed90d2d191c972028cdce8f6d1b058d8acf27
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=tekonsha+2030+mark+12+pdf In PDF document text
    • http://files.dolphinrealtyhatteras.com/uploads/1/3/1/3/131383743/xofibenomomiva_bexefelumet.pdfIn PDF document text
    • http://files.personalspaceproject.com/uploads/1/3/2/7/132740343/piwepapefa-kavijabojexopi-fuwuwumewa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c3d9f05-7558-4960-a058-1fe9c403eaf6/5870091628.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c296103f-80cd-489d-96da-c6e4b0cf62d6/givubogop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b386800-ee05-4a82-a191-7a09fd9cd112/97906468886.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9b47aa1-ecb3-4877-9bd5-34520d326551/32271722070.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dc9bfbd-32a0-466a-a78e-0547c5c342c9/niwabuvorefasogufor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5057586-859b-4b87-ba7f-367c2ad2c50d/59138747137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72d448f4-3280-4691-bd28-a36d28353ec3/20251731195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/074c6b5e-172b-4073-9c84-f07adb69cb78/62320990556.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC4 5752 bytes
SHA-256: f3c48dd96405c8eb033cad397c3dbf862fe8bb91d877e1ddf0bff2db9a2d2c1a
font_01_sfnt_off0000922f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x922F 11056 bytes
SHA-256: 6dc0f9b2f47c346fc1d15eb2a3007a1b52aae3d68c57b66ac181806be4505364
font_02_sfnt_off0000b82c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB82C 16084 bytes
SHA-256: 2c93c698e70efa444ebf79a8a2f39cbb1cc2f89adc6966ae964110355d2e6496