Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8fcae6ae3c074a0…

MALICIOUS

PDF

47.7 KB Created: 2020-11-06 14:14:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: a0f3b289e83fa7f288f64433f5997441 SHA-1: 723f350ba0a23d03906a2728a22aecee63675238 SHA-256: a8fcae6ae3c074a04ec5df7274167e37f05880992e00e3f071a3e78fefd993a5
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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=xxtentacion+autopsy+report PDF link annotation
    • https://wifajeru.weebly.com/uploads/1/3/4/3/134342489/fupukaravajupoge.pdfIn PDF document text
    • https://xumiwuwazugeri.weebly.com/uploads/1/3/4/4/134444831/da52e.pdfIn PDF document text
    • https://pevinuwipe.weebly.com/uploads/1/3/0/8/130873962/39df1fbc1ddd.pdfIn PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/rerivipepatuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/9cc4c35c-1bc2-4a99-831c-1d1a069170c4/83466852374.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a59021f8-0e06-40a1-b440-65879edb9514/factors_affecting_choice_of_distribution_channel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54238432-717f-4b2d-aa0c-221959f07a5a/simadarorabitiwumibokiguk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9576c9cb-4d2a-4f61-a54e-8281639aec40/tewodilakofesiluzagebida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6de5ba1-0260-4b8c-844f-55b4e7c6a0e1/mokla_shwas_songs_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdda0264-4209-4dec-b001-9b4ab852590f/gaxomotokigenaliz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D16 4924 bytes
SHA-256: 2be0bcf1597500dfc844ecb84f4617442a03d6fb1cf949a14de5ae18194a25eb
font_01_sfnt_off00007de3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE3 11216 bytes
SHA-256: 21b829fb50bb842a45b590d63609dc84a05190e2e400349408233f9ad85707f6
font_02_sfnt_off0000a46e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA46E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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