Malicious PDF — malware analysis report

Static analysis result for SHA-256 d61170e1d0873f14…

MALICIOUS

PDF

42.0 KB Created: 2020-11-07 08:40:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: b0d27017d898ca28ff7a9f228245c6e8 SHA-1: 0e57961d16eaa70c89ea3367d2c2edd15cfaf324 SHA-256: d61170e1d0873f141ca0c837a683c81191d771064bb76d8cb9468175bbf98aa2
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=a+study+in+scarlet+summary In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393044/normal_5fa1fbdce1efa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367920/normal_5f8ca80fc0bec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447098/normal_5f9e1f0bb0637.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369504/normal_5f8b70cb57ee7.pdfIn PDF document text
    • https://zidinekolinom.weebly.com/uploads/1/3/4/5/134516346/kivagibapofo.pdfIn PDF document text
    • https://foruvojupizife.weebly.com/uploads/1/3/4/3/134352799/1335b3748c.pdfIn PDF document text
    • https://tatazazotogowe.weebly.com/uploads/1/3/4/6/134618267/917d2d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403959/normal_5f99df26e05b9.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/bupaxomu/94628807500.pdfIn PDF document text
    • https://ziziwugo.files.wordpress.com/2020/11/13837408849.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/thyristor_applications.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/90598276728.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/50798060725.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/lipofuscinosis_ceroide_neuronal.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/bar_x_ranch_homes_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/74163712719.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_off00006667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6667 5176 bytes
SHA-256: 2c8d1c66a0192f47725819c0333ae22685317d3e2f002d4cb5f31ebb00d616bb
font_01_sfnt_off000077f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77F3 10492 bytes
SHA-256: 87022863cc512697c40c02de9f3b4b0bfc4ee2295cb796a5a828fb48df6a070c

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