Malicious PDF — malware analysis report

Static analysis result for SHA-256 94fec4fdf1009b51…

MALICIOUS

PDF

44.8 KB Created: 2020-10-07 04:15:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4147e0d3b0b04ef840488a6931136003 SHA-1: d7e108408ad43b518ca60b42a74d4566682ef0db SHA-256: 94fec4fdf1009b51b903d077c0ed74c29d3c5156fc26d3b17f86a2fc8726f86e
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=wpf+hierarchicaldatatemplate+recursive In PDF document text
    • http://zilovilef.brian-jacob.com/uploads/1/3/1/3/131381088/a1b4260372845d3.pdfIn PDF document text
    • http://files.diannastewart.com/uploads/1/3/1/3/131379443/9219536.pdfIn PDF document text
    • http://wuxepep.japanetiquettepro.com/uploads/1/3/2/7/132740623/49caeabe4.pdfIn PDF document text
    • http://files.housenbuildings.com/uploads/1/3/1/1/131164199/gexorodudo-gerufatew.pdfIn PDF document text
    • https://site-1036815.mozfiles.com/files/1036815/ruwirujamodafan.pdfIn PDF document text
    • https://site-1040244.mozfiles.com/files/1040244/biwinululonatuvuzupaf.pdfIn PDF document text
    • https://site-1036685.mozfiles.com/files/1036685/xudimibolatutesitokimosa.pdfIn PDF document text
    • https://site-1042007.mozfiles.com/files/1042007/fuvisijimavapajuvevabo.pdfIn PDF document text
    • https://site-1040562.mozfiles.com/files/1040562/rurebofutajobazonav.pdfIn PDF document text
    • https://site-1036971.mozfiles.com/files/1036971/88297178525.pdfIn PDF document text
    • https://site-1042939.mozfiles.com/files/1042939/bamomev.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/a40eb681-37d9-4eb9-8c91-1f6c317fb876/nefudisiwibakam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76664874-90be-4859-b532-36b496ad4c9b/23918928555.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_off00005602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5602 5136 bytes
SHA-256: c9ff2cf10b63e164fa35be1c25a3743e712947285bb1565f36daccdacae32cab
font_01_sfnt_off00006786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6786 14968 bytes
SHA-256: 92882372c67115172a7ce71d94dd9073620bc951f46017fafb0b20a05c15fa36
font_02_sfnt_off00009643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9643 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34