Malicious PDF — malware analysis report

Static analysis result for SHA-256 c274a2324eb05515…

MALICIOUS

PDF

42.5 KB Created: 2020-11-06 17:11:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: ddaa83820289ed3c4406e70bd0d80a36 SHA-1: 8ab1e559aa91e8bfa483d59f29d37f02577262bd SHA-256: c274a2324eb055156062406f8fe564afd3138412500a44ec62c76016b0a8ca43
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://trafffe.ru/aws?keyword=nurse+anaesthesia+definition PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f871de25c32b.pdfIn PDF document text
    • https://sipasegeremiraf.weebly.com/uploads/1/3/4/4/134404187/378808.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/palikeku.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/31764052000.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/wonizilogajelezonowixuk.pdfIn PDF document text
    • https://nevosaxovib.files.wordpress.com/2020/11/vuvemi.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/leforivezobat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b37d83cb-c80b-4508-bcb8-2564f596bf1e/91286218675.pdfIn PDF document text
    • https://rejukimop.files.wordpress.com/2020/11/povarilurukix.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/ktvn_2_news_live.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87c7bf9c-def1-4778-bfd0-620b41296fe7/pevodazalalitawagir.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_off00006a1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A1C 4932 bytes
SHA-256: f0cfbc6e790c33521e09834118353aa184d02fefd9322f3a2dd63778cf34de5b
font_01_sfnt_off00007adf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADF 10112 bytes
SHA-256: 594d59dbfa51414d1714191ac4d59af09e6139283be47e201d9e248933acacc3

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