Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eb44744bff714b1…

MALICIOUS

PDF

43.9 KB Created: 2020-11-02 16:45:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 9bc1df35e46af16ceabdbc62c8ae2560 SHA-1: 94242d154eb75967275c050d414325cebe7b0593 SHA-256: 5eb44744bff714b1b5fafc1daa6e8b237fbe2d27e243fd26147fc95beace04de
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=molecular+geometry+of+cn- In PDF document text
    • https://kizozejibudi.weebly.com/uploads/1/3/4/4/134460324/249556043c.pdfIn PDF document text
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/sakup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5f8718ef7dd91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405930/normal_5f9c6eb61ed7e.pdfIn PDF document text
    • https://fomezesas.weebly.com/uploads/1/3/4/3/134343882/vojunonev-boridalo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375518/normal_5f8c6a27133ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379616/normal_5f8c390914416.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382420/normal_5f9b31be3f0ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369173/normal_5f87b71743400.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5f8c1d9618ae8.pdfIn PDF document text
    • https://vafeperaj.weebly.com/uploads/1/3/4/5/134586379/jobuvij.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/1/0431/5178/6145/files/tourism_product_development_strategy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8047/2984/files/bobafatapitebuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4559ee9f-7d7a-41cf-9c79-8bf98bdd04a4/kukodadifewimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2779/1009/files/chicken_farming_for_profit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9383/5432/files/is_manually_shutting_down_computer_bad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0872/0547/files/border_radius_input_android_studio.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_off00006e41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E41 5160 bytes
SHA-256: 2a831cb82c9bea3258862eadd584eb1bdf10951c65826d5f1fad3806a281d926
font_01_sfnt_off00007fdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDF 10008 bytes
SHA-256: 2638f003bb2fdddee93eebe78f55ee0fa189edc2cb3f05963b944254073e760f