Malicious PDF — malware analysis report

Static analysis result for SHA-256 8293151b89c3c934…

MALICIOUS

PDF

45.3 KB Created: 2020-10-09 03:21:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 7a7d7a7f7fbbbedad576f57eedc41a30 SHA-1: 6c27931207f6292dca1bfed7ec810300c3d8ff19 SHA-256: 8293151b89c3c93477903cc26a69001544c5f2a2565cc5089598bb0e0c6deaa2
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=dungeon+master%2527+s+kit In PDF document text
    • https://site-1040250.mozfiles.com/files/1040250/wozabirajax.pdfIn PDF document text
    • http://jepesu.saaea.org/uploads/1/3/0/8/130814935/naroda-gizoteko-garobej-gebefaduwojo.pdfIn PDF document text
    • http://susuli.hindsightcloud.com/uploads/1/3/1/4/131413418/eb9c433.pdfIn PDF document text
    • http://sugiwi.strandberg-marine.com/uploads/1/3/2/3/132303052/funeko-jefiturib.pdfIn PDF document text
    • http://files.nataliebeephotography.com/uploads/1/3/1/3/131381675/vivilizito_puxajefijisix_saral.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/bd09c1a0-6f8a-469d-8182-bed8bc6019c5/jofufidijevixiwusosaxifaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f8110d0-2352-4abe-b765-014143d17c23/26472127800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfd126ce-b77b-46a2-8d64-1b2898780afa/fakulaxonusilabasoxenidev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8000f5a-a860-4c87-bde8-7300366f058a/84947082744.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ac80b53-b12c-488a-ad24-04f98cf7b94b/28931715148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77da2b4d-18ea-48d9-98ef-c842aec179e2/wowok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21624f01-d4bc-4ac4-b7b4-e9d75de4105d/pisiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89ff4651-0e93-4912-bbee-aa4af940ac57/naxolekonulojopupejoxuro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da8ae6f5-3a77-451b-83e2-ac190d9cd9d1/70640255969.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c12d9bc1-31bd-4982-91c8-e45554c46d7d/66570557545.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000679f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x679F 5068 bytes
SHA-256: 0e0d3f2e80273564affc752d83d7069397150e4d3835f9e89777dbc43e23b632
font_01_sfnt_off000078d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78D6 15436 bytes
SHA-256: f15f99e3908bb3183d6b5b28246f33c858d78b5c4ea299b9d43781e020532a72

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