Malicious PDF — malware analysis report

Static analysis result for SHA-256 78534c18a5a0c0f2…

MALICIOUS

PDF

72.9 KB Created: 2021-02-19 08:44:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 35b36ad2a227cbe0e44bcc00549eb437 SHA-1: bba61a9963ee358c063895800af845589a41b4df SHA-256: 78534c18a5a0c0f233ed941091fadad594b33602dbe9784d3483d468042e2266
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/wix?keyword=outbreak+video+worksheet In PDF document text
    • https://static.s123-cdn-static.com/uploads/4374852/normal_60045b3cda0c7.pdfIn PDF document text
    • https://renobulog.weebly.com/uploads/1/3/4/4/134464004/434349.pdfIn PDF document text
    • http://vibigalobonewil.iblogger.org/41646194833.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417527/normal_5fef75bbe5cfe.pdfIn PDF document text
    • https://zogudoweno.weebly.com/uploads/1/3/1/6/131637773/334816.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376126/normal_601de6070016a.pdfIn PDF document text
    • https://cdn.sqhk.co/firavibaw/pojbpVD/lijorinu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493227/normal_600d0e5230dd3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vebenok/38706762645.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/55010697900.pdfIn PDF document text
    • http://fufibilola.epizy.com/function_of_chloroform_isoamyl_in_dna_extraction.pdfIn PDF document text
    • http://kabasefojegozaf.epizy.com/graphs_of_inverse_trig_functions_worksheet.pdfIn PDF document text
    • http://fojamemu.epizy.com/crowdfunding_industry_report.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/kendo_angular_grid_row_template.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_off0000e199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE199 5264 bytes
SHA-256: 2dbbca30d328a85ad7573f17205bf7fe6be2f655f13997fb10f15f45e2de16f8
font_01_sfnt_off0000f386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF386 10468 bytes
SHA-256: a1ccc5e7874968f82b6fefa627209a1d972dac148f5ac263e6a0517d23fdfe94