Malicious PDF — malware analysis report

Static analysis result for SHA-256 438d68c7069f2d84…

MALICIOUS

PDF

67.4 KB Created: 2020-10-03 04:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 95709a2f9606fa38bffc9d04c583ba00 SHA-1: 35331dfe2cd329bffa9e76d6a91aaae977c3dfe6 SHA-256: 438d68c7069f2d84c197524032af05a4504f2f4657dbab9b8f73b0f9cf088a10
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://gettraff.ru/strik?keyword=principios+administracion+operacione In PDF document text
    • http://files.edibleexpression.com/uploads/1/3/0/8/130813765/pavafuruniko.pdfIn PDF document text
    • http://wujir.thebostonbridge.com/uploads/1/3/2/6/132695560/25512.pdfIn PDF document text
    • http://files.thatoneplaceintown.com/uploads/1/3/0/8/130814492/6963699.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/14472313-5cbe-4c96-ad91-18e968c565e1/wigogozafip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebb580fd-e5ad-48b8-9c4d-42c9592bc08a/sowamopodez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd73b23e-6b5b-4764-9ff3-c72ac1b4fbb1/26689712041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92cf4047-1be3-44e5-8dcc-c50115e38482/56590599039.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48726932-d820-4ed2-9cd2-43b40cf82467/luwegazerujufanepaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/jujukojewubobujogupan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7196/2788/files/no_fear_bridge_login.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/7666/7542/files/digital_audio_coaxial_cable_to_optical.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/8150/5437/files/valley_health_and_postal_credit_union.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baddd4ad-3dd3-4c0d-ba24-7ef5fe847325/fujuzefedurilezuxag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f045f6a6-c789-4162-8446-8be198ddcfbc/22854881326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02316d4a-de4d-4a39-9acd-7ccb1a9dfea4/67175704256.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad3f3012-f0c9-489c-be2f-d76ae4f40c0a/78100205773.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9DA 4976 bytes
SHA-256: 70450cc98cfbc800fbf27d2e3884d3e0450a134049d6b3f1f7af00e6e803c6f2
font_01_sfnt_off0000ca94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA94 11620 bytes
SHA-256: 2ff25a39658093041dae4947e49787c5695738523cd16e44f425af474d1a4998
font_02_sfnt_off0000f05a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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