Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65286ce38cc57d5…

MALICIOUS

PDF

40.7 KB Created: 2020-10-31 12:56:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 5abe82e4a7408faa1c3b95bd7c99b95d SHA-1: 90c2fbebc901ef825ca009f01c3cba6bcbbb3a74 SHA-256: e65286ce38cc57d52e7702c6843279524a33f65964bd219bc3bd53790803b6e8
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ttraff.com/123?keyword=figurative+language+worksheets+6th+grade+pdf In PDF document text
    • https://kuburabet.weebly.com/uploads/1/3/4/3/134362545/bepaza.pdfIn PDF document text
    • https://wuwuleli.weebly.com/uploads/1/3/1/3/131398564/1662826.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/4041939.pdfIn PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/5647925.pdfIn PDF document text
    • https://nogafuku.weebly.com/uploads/1/3/2/8/132815296/385f16b.pdfIn PDF document text
    • https://tokoxiwo.weebly.com/uploads/1/3/4/3/134352544/nimedimaletimawu.pdfIn PDF document text
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/9414968.pdfIn PDF document text
    • https://podesasi.weebly.com/uploads/1/3/1/4/131437149/mexobotuwatojogevede.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/aa92d.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/7985342.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/1/0498/6657/1975/files/amc_loews_broadway_4_movies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f698bf26-063f-40f7-82c2-2f86731779f8/ejercicios_de_palabras_agudas_graves.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a39c75cb-be99-4cf7-b0f0-c3d4d24b5659/sprint_speed_test_challenge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8365/1990/files/17171489365.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_off00005fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB3 5628 bytes
SHA-256: bee7050a9a9f241b4f0a91cacaa5a1dc0fe31cf21672c9c7b20a66b91ed63746
font_01_sfnt_off000072e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72E9 10264 bytes
SHA-256: ebf858cef2434ca4854c893a37cdf4e6785f00c6cef75c4b651d219858c45f7b

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