Malicious PDF — malware analysis report

Static analysis result for SHA-256 d78b011c20fc69b7…

MALICIOUS

PDF

40.3 KB Created: 2020-11-08 10:04:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 2e080d47b039b84fd82329b8a8bc33df SHA-1: 9f4de9a7dcf73d591072dd5874c69c3e434a86ab SHA-256: d78b011c20fc69b71eeb8077cdcdf3c2eba6109361af3690c1f0a2d974b7c4b3
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://traffset.ru/aws?keyword=algebra+1+regents+june+2017+answer PDF link annotation
    • https://xikigojajutu.weebly.com/uploads/1/3/4/3/134385057/noleniz_nujiradutotofe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://mereluk.files.wordpress.com/2020/11/tv_guide_dstv_mobile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdc87bef-fd3f-407f-82dd-412b8c2ada3f/71511851704.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bda5d4c5-6baa-4541-8e5d-253b342fd171/lake_murray_floating_cabins_facebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51dbf76e-8fcd-4e5a-8e21-2329661ab310/kesovumafevowok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f9386e1-a49d-4d68-8744-7734fbf1377d/jedino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ee7c6b0-fa84-4838-882d-4bf4a33440ee/44362619597.pdfIn PDF document text
    • https://rezekine.files.wordpress.com/2020/11/tatojesanawav.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_off00005bd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD9 5556 bytes
SHA-256: 3ad94b6910fbe2029a7483031b97850ca517697aad1a6746dd8857a42fa13456
font_01_sfnt_off00006ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF1 11244 bytes
SHA-256: a7699f29c4f581255fbeb0d77e3130fe2e43b5b65460a629f6789f90e1f4f609

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