Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c1aee798cd63e36…

MALICIOUS

PDF

44.6 KB Created: 2020-10-07 08:15:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e7e33ccac9830a5cc2aaa9edec4f1f1f SHA-1: d0649c3e3dcfa2dd848422168d220c6aa079673f SHA-256: 3c1aee798cd63e3627f536bc5838f029b41d349310dcf79bde552841168dc680
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=para+body+smith+machine In PDF document text
    • https://site-1038815.mozfiles.com/files/1038815/89768879874.pdfIn PDF document text
    • http://topitafi.s-4radio.com/uploads/1/3/2/6/132681245/jekejobutokine_xarozavatujejo_dezifuke_suwopobazedome.pdfIn PDF document text
    • http://files.basile-vareltzis.com/uploads/1/3/2/7/132740423/katavapopoxelo.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/fedddc47-60e2-4174-b85b-f14f882cfbad/8167708318.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51efc2ea-8ccd-4191-894a-a09d7b35f9b3/48301348861.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d04eca44-0d6c-4747-a475-edb1b524f584/75997697426.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6c64fa3-325e-4fb2-8983-66142164a5ad/97416808086.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf63b977-d6a7-4440-9d99-a0057a119eb5/rabevazutigon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a34c7e4-4263-48af-b424-a85a97396532/wesawawuriwidi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f75eebae-dce8-47cb-8058-cc3bcce677ae/1382819762.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57d537ec-d4a2-40bc-a6be-d6f1ef1cad23/5522839535.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7240ed9-ddd1-4e3b-8c54-9e6cca39ffc4/60876940294.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bce8ca3b-41b5-4d54-891d-c6eb28b2c527/fusibuvaxise.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_off00006ff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF5 5388 bytes
SHA-256: d04af59407da096ecaac005d37e6e1a3e418161574c8b5cb0618e02f79882877
font_01_sfnt_off00008224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8224 10680 bytes
SHA-256: 0efa1369520919a1a12ed0521a4cc2ef38cb4355b7ccc8b8b7246822673ca0b8