Malicious PDF — malware analysis report

Static analysis result for SHA-256 78bb6f09a20cc7a5…

MALICIOUS

PDF

45.8 KB Created: 2020-10-03 08:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 5b89e3e1f3d067561ad2099cdf581a13 SHA-1: 6b71b20e10027f7eb23c77804bd76176003661a4 SHA-256: 78bb6f09a20cc7a55463b7f68864b5d135b2ca8ec7e371b983313fa7b6a95801
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=stardew+wiki+leah In PDF document text
    • http://pobokik.thierrymontoya.net/uploads/1/3/2/8/132814930/054892906.pdfIn PDF document text
    • http://files.utig.org/uploads/1/3/1/1/131164100/sanarefod-vanisenabawiw-kowipopibapajom.pdfIn PDF document text
    • http://gamuzako.judithmbishop.net/uploads/1/3/2/8/132814930/c7cf9bcb2d1fb.pdfIn PDF document text
    • http://files.carlabestyou.com/uploads/1/3/2/6/132696285/vizop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/39935d84-d99f-412c-a27e-6744158d0a17/38933254654.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dd29c3f-d18c-4bf6-9a20-5ccc638fa4a7/60358823574.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/814cf474-ba9b-4b1a-931f-6e4c4251c9cf/47332875882.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9212694-2de3-465d-aa11-b3dd19d2ba04/ribuxemivav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f39db046-b5f8-48ba-87cc-172479ad69d9/13378082529.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dcbc8e9-bfe4-4a82-a590-e11309bb94be/narixuzosumel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eb94828-2e1e-4b18-9e30-c1ac9a2e77f3/jobusevozefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6029214c-d49a-4d09-8b23-14e9d8595676/39213774806.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf54de85-3c7b-4dce-94d3-42c527ad98e5/16195049377.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03e8c177-62d0-4089-a790-c3ac44e767fe/80829208791.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_off00006ab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB6 2940 bytes
SHA-256: b255dc2f10caa7cf961bab1172e8a2d2e5e83e097d684c71f73ac3a8f13737b6
font_01_sfnt_off00007534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7534 4992 bytes
SHA-256: 62fe5ecbd97f1c2c9d98186103a617d855c81dbccd77b76824fa8fa7c5373fb0
font_02_sfnt_off00008639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8639 10600 bytes
SHA-256: 360d53c2bc946ec630f5930d85024020d27be35c83e0584cdb5b74fd6e8166ff

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