Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a973c175cb50b1d…

MALICIOUS

PDF

44.5 KB Created: 2020-10-16 05:41:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: e94d93623b9f62bcbb5fca2021054147 SHA-1: bb9b1fc1369cdd714d49edf796783e5c6fc43105 SHA-256: 8a973c175cb50b1df18312d261fdf2b2b568e6f86812ad4efe934efefbf45530
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://ggtraff.ru/123?keyword=cuisinart+coffee+grinder+instruction+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f873f016fc23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f88d8e8f1224.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368492/normal_5f883f0797da2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5f871706c8614.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/xopevu_vilugarokobijos_fimorekon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f871eb1d6415.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f882ae03652e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f8708cf986f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f86f63942934.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366321/normal_5f8773e66ca75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366642/normal_5f87b11f681c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f8723cf6cad3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368759/normal_5f88b7ad53f3c.pdfIn PDF document text
    • https://site-1042983.mozfiles.com/files/1042983/zewijopam.pdfIn PDF document text
    • https://site-1043690.mozfiles.com/files/1043690/pineke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/41e0dd40-96cd-4202-8302-62a58da7ce6e/14922037545.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0e57cc5-5cf8-4af6-bd18-01a437278916/6967496604.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e91772a-f61d-4c83-8b4d-beb3f7878d18/raxejedod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8e4b7a3-42eb-4471-9ff4-93f74d840275/87003289241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fa54003-1c4c-44c1-ac2a-46ba24f16d84/taxirexel.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_off00006f46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F46 5248 bytes
SHA-256: fbb8dfaa931658a4faa116f6e4aec8ab065275b395700361e1aa3f682d85984e
font_01_sfnt_off00008101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8101 10420 bytes
SHA-256: 6a942ff9a61a790ebf250423968c7e6216c9f51603a472e98fae505bba250c85

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