Malicious PDF — malware analysis report

Static analysis result for SHA-256 53f34311070f4506…

MALICIOUS

PDF

40.7 KB Created: 2020-11-08 08:43:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 7bbf1f11ef418a17004e4bb67afd4573 SHA-1: f506f490b80121c4ff9eaec0a282d2ff9a0297af SHA-256: 53f34311070f45061cd3fb92d1829d6e3537bbc76f4245e4a6f6eff37691f2ae
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://traffking.ru/123?keyword=couchtuner.com+walking+dead In PDF document text
    • https://kalabuzamebuku.weebly.com/uploads/1/3/4/3/134339718/23d22421b1c38e1.pdfIn PDF document text
    • https://gubuxojigez.weebly.com/uploads/1/3/4/6/134650605/fisibiv.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/3534a.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/1e3ab30d-8692-47c6-8b43-bea076335a4b/pvc_electrical_conduit_installation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/704cb084-d6e1-43e5-97b9-194a1685b80c/multilayer_pcb_design_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2472c161-cd33-4bed-b9e8-6f9a90ab6006/16518674276.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ecc8fc6-a4c3-4d9c-9675-3c40b3f625e6/40317830659.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/como_no_aprender_ingls.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d8434ac-9ddf-4aa3-8d27-c19a20387cb7/33216275547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5536fbac-1c3a-4267-9002-6740659da743/67501825773.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/731b9594-420e-4b7f-8dcb-aebbb15e234d/2018_telugu_movies_imdb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/016117b9-a685-495d-9b8b-bed2ac5827a7/kokixirafojakixul.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_off00005f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F32 5268 bytes
SHA-256: 3ac2a0e132e83316f2f013cdfe351d520b8709756ba7757d68950695bea23dca
font_01_sfnt_off00007101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7101 11272 bytes
SHA-256: 5508229afa23cf560775c56fb984024c10850f9824fe9f25dbda05954fe0c594