Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bd745e55359e48d…

MALICIOUS

PDF

53.3 KB Created: 2020-10-01 09:29:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: d41f6e2b42f7bbd29ef62c2c285425aa SHA-1: 969a5ef7094de928b0c233d43cddff93b50895bc SHA-256: 6bd745e55359e48d90a765bbc0cf0e5a1b3a0d4e7d65cffa1df28a9b3117ec0f
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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=beginner+kit+for+arduino+tutorial+pdf In PDF document text
    • http://files.willsphotographypa.com/uploads/1/3/2/6/132682681/mawudi-tazewuja-duveditusifed-sugitefad.pdfIn PDF document text
    • http://files.dollysskinart.com/uploads/1/3/1/4/131453847/9161416.pdfIn PDF document text
    • http://kizoledi.lifewithsqueaky.com/uploads/1/3/0/7/130776054/wodoka.pdfIn PDF document text
    • http://foboz.endlesstrails.us/uploads/1/3/2/6/132681352/393093.pdfIn PDF document text
    • https://site-1038489.mozfiles.com/files/1038489/52934167552.pdfIn PDF document text
    • https://site-1036628.mozfiles.com/files/1036628/fawuw.pdfIn PDF document text
    • https://site-1036939.mozfiles.com/files/1036939/40501251792.pdfIn PDF document text
    • https://site-1036929.mozfiles.com/files/1036929/zovukenabemisivesexatom.pdfIn PDF document text
    • https://site-1039140.mozfiles.com/files/1039140/gidan.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/1f7c60d0-accf-436b-beaa-cadca56523d8/nidomod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da25b1e0-a024-42e4-bfac-a1eb9e547c9f/31809573125.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_off000091bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91BC 5144 bytes
SHA-256: 2453656d38c6f0706792a675d4e2f09c7867a6c8f236ca36a0cf35f8ffd85483
font_01_sfnt_off0000a355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA355 11556 bytes
SHA-256: 9a2962843f965cbbc483104c0dcc1c31d804eae8fc1229d6295df61244fac571