Malicious PDF — malware analysis report

Static analysis result for SHA-256 a06f59468a668b92…

MALICIOUS

PDF

45.4 KB Created: 2020-10-12 00:18:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 376c5a7562300993c24e4c79b8ea4d03 SHA-1: bbf5779671f5f4f96196774b2da9798ad6b4d1fb SHA-256: a06f59468a668b92ed3d2a5fa235d8e632a0242762e17eae51f3e5ebac432a0b
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/pify?keyword=a+few+good+men+monologue In PDF document text
    • http://files.uofscdsp.com/uploads/1/3/1/3/131383954/1e0b0c2781.pdfIn PDF document text
    • https://site-1038530.mozfiles.com/files/1038530/35567379136.pdfIn PDF document text
    • https://site-1037111.mozfiles.com/files/1037111/julif.pdfIn PDF document text
    • https://site-1039998.mozfiles.com/files/1039998/xudaxajok.pdfIn PDF document text
    • https://site-1039380.mozfiles.com/files/1039380/2832651852.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/1/0433/4767/3253/files/forest_hill_pools_reopening.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7787/0786/files/quadratic_function_transformation_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1697/3219/files/game_of_sultans_cheats_deutsch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1301/2630/files/46845081476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/9642/4607/files/imani_the_chosen_one_book_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2547/1400/files/50667028401.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_off0000751f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x751F 4824 bytes
SHA-256: 486fa743d4362f5ab5d96e6505253461f61b02b7bb09296835d0718cfe652bab
font_01_sfnt_off00008596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8596 10264 bytes
SHA-256: 1485e8bd46ab2c0bc1ce43b32014843bc54381ae2fdcb6edac55e09ef33865e2