Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1fc3620c9b63c3e…

MALICIOUS

PDF

42.5 KB Created: 2020-10-01 05:22:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 8a299995a1d5d3cd144bb9e24ead6619 SHA-1: e2dac924878fb6482d77e5d3d5477fc16cebe509 SHA-256: a1fc3620c9b63c3ea45c9eb487cafb7469ada9f523733faa50a5929f324c0d84
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=online+adobe+photoshop+pdf+editor In PDF document text
    • https://site-1039279.mozfiles.com/files/1039279/robunibak.pdfIn PDF document text
    • https://site-1038932.mozfiles.com/files/1038932/28199060665.pdfIn PDF document text
    • https://site-1037187.mozfiles.com/files/1037187/lizukajefuvojenusiv.pdfIn PDF document text
    • http://loxejum.austinsbrandingiron.com/uploads/1/3/0/8/130874262/fc111.pdfIn PDF document text
    • http://files.littlefikra.com/uploads/1/3/1/4/131453194/b35b606aee9c.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/e0d25ff1-ac21-48c7-9d4c-c54bbf5cc5ca/gafufafomabalab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7922ddc0-7a45-4ed5-9e74-5c841f601582/20127058792.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be5c9670-77a5-4c57-9d60-53d8e7b7cfea/bosatikobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9390/7869/files/html_admin_template_responsive.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_off0000687c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x687C 5296 bytes
SHA-256: 7e7dca3edf43fd6ac3427b6ed6146f7da9fb1ba066196048c449a172474e598a
font_01_sfnt_off00007a6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6C 10240 bytes
SHA-256: da75b9d162a6e85c9db7c15859ad0e22a88cad999733d630cfee96f2eb64a4d5