Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b7832315f84562a…

MALICIOUS

PDF

47.7 KB Created: 2020-10-01 01:18:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 657a6c39f63a4acfec88a015c284492b SHA-1: ed11fa6965f1291f8dcb175ab17fc8a45d866880 SHA-256: 5b7832315f84562a450496e89f622b8ee5c6d27edaf740d03974e0a4950e6c16
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/strik?keyword=root+cause+analysis+procedure+pdf In PDF document text
    • http://files.coastnuflow.com.au/uploads/1/3/1/4/131407965/safumazajerugida.pdfIn PDF document text
    • http://puten.enneagramplayground.com/uploads/1/3/0/8/130874339/a1b8a1dd6c2b54f.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/fa352b3e-7d1e-4352-b027-017c72f1a2e8/67980976011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be32e7b0-1bd2-4fc0-9c09-fe8aa0ef99fd/tefaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f8585bc-ef6e-454f-898a-f04b271e62cd/89545515221.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e985c38-0b72-4e9a-848b-9e173deecdd8/16039390517.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e3e575f-3d78-4da4-9a71-6d7985b8344a/65837092020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f2c966c-841c-4b9b-ae92-7e05d1e39424/39323000846.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d506b3f3-ddd7-4182-8cfa-8f6b65673f5a/folaniroxusunos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b495ee7a-fc8c-4c62-ad05-91d41ec29d26/xudijixexovegutuzegex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b156f15f-ba80-4f9f-9ccb-9d716ac66d84/noxoxefuninafubokokoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e2a54b7-2f7f-4093-995e-61b670031a6f/tilunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efd64cc6-11a9-4a8a-93db-e118607c64bd/73149673628.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA6 5140 bytes
SHA-256: 272502b9135828ead08409c50eb727763f94d66b6c35091ea8431047f4a2defc
font_01_sfnt_off00007f36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F36 10816 bytes
SHA-256: e9222ff8caf07a84c4c247ffa0b42be50b3eddd718df34d6559a9e53ba02c898
font_02_sfnt_off0000a40f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA40F 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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