Malicious PDF — malware analysis report

Static analysis result for SHA-256 d92fb54e3ba91361…

MALICIOUS

PDF

43.4 KB Created: 2020-10-02 02:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 73d982a0d7255be34b87ac7626113cd6 SHA-1: ecd509ad0681b570333dd765fbe0bbb0927c1ed6 SHA-256: d92fb54e3ba91361f6bb443d45dbb0ca61b560659e2b5323becaec45c4591221
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://cctraff.ru/strik?keyword=mxr+chorus+manual In PDF document text
    • https://site-1040299.mozfiles.com/files/1040299/5991682262.pdfIn PDF document text
    • https://site-1037138.mozfiles.com/files/1037138/57194391988.pdfIn PDF document text
    • https://site-1037033.mozfiles.com/files/1037033/finazovenamokoxusuduf.pdfIn PDF document text
    • https://site-1036815.mozfiles.com/files/1036815/mufem.pdfIn PDF document text
    • http://nobap.andrewtaiwellness.com/uploads/1/3/1/8/131856281/6844834.pdfIn PDF document text
    • http://lagum.oldvicarage.org/uploads/1/3/1/4/131408899/firumevo.pdfIn PDF document text
    • http://fowugo.firstlovefoundation.com/uploads/1/3/0/7/130738705/wufixixidavobox.pdfIn PDF document text
    • http://bomapata.learningindigitalera.com/uploads/1/3/1/8/131871590/44a10f5ee674.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/88bf6a02-315b-4637-a2f7-962a565740db/22287054396.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d984f147-a9be-4b2c-90e9-abada1c9a82a/xotulomikara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be11858b-bfb3-4b11-b9a8-01b941476f40/vavukubijepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/172a9156-9aa6-48ab-872e-6cf127d37e95/xawofoparawadoxonujaxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a362b6a-132d-4489-87f4-4a431545ec63/lopuzivipiwadoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0813d65d-2aad-490e-bcec-2d2bbd1f0f64/17514811427.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4B 4748 bytes
SHA-256: ad27aadd1ce254a8c150b42d2641bae9063449d31e3e12e3d18a4c8aa41b2189
font_01_sfnt_off00006f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F35 10304 bytes
SHA-256: b4105d92182f0088aaae4a8614ae18d8fc77f9b0941491f2dde82cb0be087b38
font_02_sfnt_off00009275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9275 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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