Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8378216e404a8f5…

MALICIOUS

PDF

45.5 KB Created: 2020-10-15 00:50:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3e628b5f3aad697bc03a81b4bc54238f SHA-1: e02c28ef9e22d2ff1f266a2e4e6612e3743ee669 SHA-256: f8378216e404a8f5a6d34a7f31d14ce8d58df66fb7547a4b282e60881970dbfd
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://cctraff.ru/strik?keyword=tesis+sobre+violencia+psicologica+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366623/normal_5f876209648b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367303/normal_5f87680ccb20b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f871f7cd2d5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367313/normal_5f875b9087da0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f870822b33b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5f86f998660e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f876c89763af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_5f876d3e396df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f871bcd7df89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367947/normal_5f876f619ddec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f870defa78af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f876c27d49bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_5f87040024776.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f870133e7fb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367667/normal_5f874a4713188.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5f8752663a8da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365576/normal_5f876f3111f42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366652/normal_5f87262b0fa9a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1896/3109/files/70968184233.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2781/5833/files/kewarezatezedunufarolin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2951/8746/files/thermodynamics_enthalpy_of_reaction_and_hesss_law.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4986/4353/files/zerogoboz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3182/9412/files/g_minor_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/1525/3411/files/66883945881.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_off000070fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70FC 5472 bytes
SHA-256: dfeff94c15b6a5a6ccae602de032d05b227e773589ad7274cf247bc1229571d8
font_01_sfnt_off0000839e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x839E 11104 bytes
SHA-256: 62c6b15eb7cd48cac34f900053bd1782ff10959f8b7988f9b7a0a6e3447a91eb

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