Malicious PDF — malware analysis report

Static analysis result for SHA-256 26a58213e67f9cb4…

MALICIOUS

PDF

46.3 KB Created: 2020-10-15 23:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 255f2d98f6915510bd76a9320c612291 SHA-1: e3e0964aac1b03ef0b88e244ad34ccf6bf1e9926 SHA-256: 26a58213e67f9cb482e30575544e903ee75ac2e39d2158e1dad5a5a488d54b45
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://gettraff.ru/123?keyword=guide+jax+top+s8 In PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/f9007.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/3156467.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/roriturosiw.pdfIn PDF document text
    • https://site-1036975.mozfiles.com/files/1036975/48318294813.pdfIn PDF document text
    • https://site-1039911.mozfiles.com/files/1039911/lowuwurorumedorevosezidi.pdfIn PDF document text
    • https://site-1038310.mozfiles.com/files/1038310/zufuginomagawibir.pdfIn PDF document text
    • https://site-1038856.mozfiles.com/files/1038856/53962948954.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370076/normal_5f87faed96d0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368970/normal_5f878c68822ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370052/normal_5f88625813690.pdfIn PDF document text
    • https://site-1043917.mozfiles.com/files/1043917/el_poder_de_la_kabbalah_descargar.pdfIn PDF document text
    • https://site-1040681.mozfiles.com/files/1040681/96984873682.pdfIn PDF document text
    • https://site-1048473.mozfiles.com/files/1048473/25820912891.pdfIn PDF document text
    • https://site-1041944.mozfiles.com/files/1041944/dixagonorudigatu.pdfIn PDF document text
    • https://site-1039324.mozfiles.com/files/1039324/28282314339.pdfIn PDF document text
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/weginafeniwajazinivo.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/gosibokuvefuj.pdfIn PDF document text
    • https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/752275.pdfIn PDF document text
    • https://fadusoga.weebly.com/uploads/1/3/0/7/130739873/8580329.pdfIn PDF document text
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/9777323.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/7231d07b-dd4c-4475-a001-9f02d8f948bb/11708916897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8bc92eb-d74c-4eb2-9346-808e9864b9e4/jutugikuvewugapilogilop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f296552a-ddca-4ade-8198-f37c5ac9be72/letax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fb3e856-4f8e-4c9c-9572-d0c91a7e1337/95984922091.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_off0000769c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x769C 5192 bytes
SHA-256: aa9baa84a1605be360919e77c356b518c2c2186ed09409bf4d9479b961c34de1
font_01_sfnt_off00008861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8861 10568 bytes
SHA-256: 659ae4f5d94f1c2c7a6beefa6b9427166798f42555074873ad84bce3571bdc6f