Malicious PDF — malware analysis report

Static analysis result for SHA-256 caf11ce56a68296f…

MALICIOUS

PDF

54.6 KB Created: 2020-11-08 01:18:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 48fa7670af69caff200d8edaf893499b SHA-1: ff3d7de84b09237e0a73304476fda911261242ad SHA-256: caf11ce56a68296f3bf7e8d141dfc4911a8f3979cd9e4b0a3b02a9dc50d45734
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/aws?keyword=advanced+ninja+unblocked+77 PDF link annotation
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/kivowof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470019/normal_5fa709850e1f1.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/15e43dbfda47b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390051/normal_5f92523d992f7.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/tinibej_losafiropi.pdfIn PDF document text
    • https://nevitasez.weebly.com/uploads/1/3/4/3/134305442/fimaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388814/normal_5f8d905048b75.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/4dee1a4c-0818-4774-a978-ea0dcb52de9a/kotiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10c7b443-acce-4ac5-bd03-8ba318f97f88/calor_latente_de_evaporacion.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/kaxeloruvedikabulonenudi.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/wimbledon_live_streaming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4a4f387-87a0-4767-95c5-8d004677f261/21590882010.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/levumujaradowadatir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f94b7321-7448-458c-9ec7-83d27bfbc938/sadumekonose.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/so_kieu_truyen_tap_2.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/doriwenevonuxozuzewuj.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_off0000978b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x978B 5068 bytes
SHA-256: 8b144f81a533140e05d23bc6aa055ff24f1e02e4bf889617f58f31f36b2915ae
font_01_sfnt_off0000a8f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8F0 11520 bytes
SHA-256: a69f462c2bf4ac912b640803c5425149e2d75faa3fddbb8cc9665548be9f6ac8