Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cf91649aa913dda…

MALICIOUS

PDF

65.9 KB Created: 2021-02-22 16:22:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d100848c943228470aff9667b8f2675d SHA-1: a5f32a37817effb1af1d1cff1839da8be4e4e7e0 SHA-256: 5cf91649aa913dda04d52ab68b06e9f6b7d1ea0ec4b89426ac8d376cbf1fb0f7
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://druttle.ru/wix?keyword=10+piece+queen+dawson+black+and+red+comforter+set PDF link annotation
    • https://nezejigon.weebly.com/uploads/1/3/4/6/134611081/c406c8b6c7709ed.pdfIn PDF document text
    • http://namekegosanobus.22web.org/baillie_gifford_worldwide_funds_plc_annual_report.pdfIn PDF document text
    • https://zelowomuguzak.weebly.com/uploads/1/3/1/3/131379017/tiwubixunitoruzo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422386/normal_5fe9a5284736f.pdfIn PDF document text
    • https://fikazimibugexu.weebly.com/uploads/1/3/4/5/134515259/9911993.pdfIn PDF document text
    • http://motovepom.iblogger.org/nubawagapelefupurelowu.pdfIn PDF document text
    • http://meweremidef.iblogger.org/tufesesifalolutoxigazepab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388413/normal_6029561a021d2.pdfIn PDF document text
    • https://dodilepu.weebly.com/uploads/1/3/4/4/134444379/713771.pdfIn PDF document text
    • https://datipozor.weebly.com/uploads/1/3/0/8/130813945/9465723.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
    • http://sesoxevanadike.epizy.com/project_report_on_attrition_analysis.pdfIn PDF document text
    • http://xesujenomudot.epizy.com/12905857262.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_off0000b826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB826 5704 bytes
SHA-256: cac43d5a6a27cced8385d9439e301d55a5039a80f4cc33e20e5a895086116955
font_01_sfnt_off0000cb71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB71 9708 bytes
SHA-256: 6df5f3899703c6f52f43ce9c61493c1f58c6f2fefd9800b3fd97db3ebdbc6d64
font_02_sfnt_off0000ec8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8C 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c