Malicious PDF — malware analysis report

Static analysis result for SHA-256 4300b0c39b938d59…

MALICIOUS

PDF

44.8 KB Created: 2020-10-18 09:39:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 09ee2526d13c0eba9ddce3b24c7bfc50 SHA-1: 60aab5daeb12fec7158aca35dcc32fa99844120d SHA-256: 4300b0c39b938d59e0cf0be30c056d93ccae8d33e5f498209af4d6a71e8fd9fd
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=carrier+weathermaker+8000+service+ma In PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/dinewemuvi-zibekafosom-xisasiwa-butiwetakokuket.pdfIn PDF document text
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/nolukida-wewiwasuf-kebori-dejev.pdfIn PDF document text
    • https://gexirirexov.weebly.com/uploads/1/3/0/8/130874239/xalodupazazatasud.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/8980310.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f878d8a0489e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_5f89c064a0edb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_5f876455aa3aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374203/normal_5f88f18fd724a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367271/normal_5f89c0635936c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f87712be87c3.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/1/0483/7756/1237/files/villains_and_vigilantes_character_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/10_deep_clothing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3434/0259/files/nike_slingshot_irons_degrees_loft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e41a38f0-7eee-4278-9c80-8548cf68b41c/75501195628.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbb2135c-e856-4007-bb1d-8d63822cdb1e/logavilukumobizosi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3adbf0a-f757-40e0-8d7b-78fb03974d76/fixeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8697/7441/files/soleus_air_heater_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2910/0230/files/game_theory_graphical_method.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5399/8487/files/61983377141.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_off00006e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8E 5464 bytes
SHA-256: 13882ea68083c3c34bf046c783fc4bc0caec9b377eff0907ad57d38cc7a2fd10
font_01_sfnt_off00008117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8117 10720 bytes
SHA-256: 1c13d523a66019a959684a858eff79c455e05d161513b5b004258f5b4f6ff944