Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a18243015b979a0…

MALICIOUS

PDF

49.1 KB Created: 2020-10-15 15:40:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e6adcb4de14233c86c3263ddf9622a9c SHA-1: e22abc63704d47fbcc4028ef48d01fba418e1ea4 SHA-256: 8a18243015b979a0474abfd1310b3d70c771ae101fd76c0419b3bd2fd141dd87
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=rumus+struktur+flavonoid+pdf In PDF document text
    • https://site-1041950.mozfiles.com/files/1041950/lofijimexupefosuxixam.pdfIn PDF document text
    • https://site-1048529.mozfiles.com/files/1048529/zemefevowetuk.pdfIn PDF document text
    • https://site-1043258.mozfiles.com/files/1043258/netizopov.pdfIn PDF document text
    • https://site-1042843.mozfiles.com/files/1042843/joleju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370078/normal_5f87ff7d0a5de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369797/normal_5f88111245e88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f871bf4aae16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366397/normal_5f8838e1af9f0.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/roriturosiw.pdfIn PDF document text
    • https://paduxadoduxim.weebly.com/uploads/1/3/0/7/130775016/ff5fc19709.pdfIn PDF document text
    • https://gikanirirexenad.weebly.com/uploads/1/3/0/7/130776133/108d2e1.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/1/0437/4190/5057/files/66977714907.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/1354/1529/files/pekosukaba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/3398/8767/files/dimisudedaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3704/0023/files/fikitakuwigowumigevogumat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2782/3264/files/core_connections_algebra_answers_chapter_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3304/2330/files/zivipebagepurabebik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0757/3655/files/256_year_old_man_in_india.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4281/8206/files/allentown_school_district_jobs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2448/2982/files/buxufadiwixes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f27ee80f-3e59-43b9-9449-e5c88be0b799/16627613042.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/965e2886-d769-4732-85e4-dd31d75c03ee/koweke.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_off00007fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FED 5320 bytes
SHA-256: 97c9044bcfea07682994b7fb5181a3d86f1ebf06ffda7d26080274506716c37b
font_01_sfnt_off000091f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91F5 11644 bytes
SHA-256: 249f5e26e0ad3a74235bc6478864bf4f751b183adc149c929a1d0fcb7155ac26