Malicious PDF — malware analysis report

Static analysis result for SHA-256 37d9f996408a25a6…

MALICIOUS

PDF

48.4 KB Created: 2020-10-17 00:35:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 447268aa113026a241185e9c0431ec73 SHA-1: 7b193210308bfb86682c4f0e34cf115de9cb78f9 SHA-256: 37d9f996408a25a6c1442841163d3329aea159853001962663b18bb49eb934a5
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=pdf+to+jpg+converter+apk+for+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5f87ae581ae0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_5f8a117a10f75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369653/normal_5f88d628d0761.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5f88c44d3e3c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367007/normal_5f888811a9bcd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f895dc4a4c8b.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/1/0431/0987/5873/files/72782608290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7807/2985/files/boston_legal_season_2_episode_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/xray_mod_minecraft_pe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1392/9630/files/tikigi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1966/3522/files/social_security_office_port_chester_ny.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5eefbc0-ea6c-4e81-9696-117f62cd3d3a/60465866587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef252d21-3cc5-420d-8e0c-bb44f4d4d2c9/23125470663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36534568-799f-40aa-b694-d67869e423d7/17856480941.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a5d7d86-1510-4d93-a072-e044511a9690/suzusexejunup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d6eb9c9-e345-43e4-9f27-84a86411571e/popukewotolekadeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf529f5e-eb98-4c37-938c-fbe4ded5c0a9/5072293624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60d01e85-4733-40e0-9938-580ed58a79a5/kimuremisetamijap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5744/6050/files/wilco_life_insurance_company_nashville_tn_website.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8515/1390/files/response_cost_punishment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9201/5787/files/types_of_laxatives.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0668/8412/files/bathroom_corner_shelf_ikea.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6644/9816/files/3722480602.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_off00007fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC0 5316 bytes
SHA-256: 35270e79522dfcf679050796a42d1a1b5fa674f22493b4aa45919cc2e604c51e
font_01_sfnt_off000091f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91F5 10036 bytes
SHA-256: 7c4fa652af4b4538f34a9720760d718a1ff087418c1566ba344d1c2d0fca6333

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