Malicious PDF — malware analysis report

Static analysis result for SHA-256 18916473dc406def…

MALICIOUS

PDF

72.0 KB Created: 2021-03-05 23:43:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: cc5e275f793844a3babec2a4173d43e3 SHA-1: 30fd525000624d40ec55b7b162b81c3051ff208e SHA-256: 18916473dc406def4315098eb15e449cb14b40a4c1a323ccc1de9697272772ef
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://pelibifir.ru/wix?keyword=manual+muscle+testing+grades+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4448740/normal_5fcbcb11e06b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371508/normal_600a4a5a443e2.pdfIn PDF document text
    • http://pinegobojefo.getenjoyment.net/leica_r7_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420224/normal_602c99be8244a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406782/normal_5fc6587ad8399.pdfIn PDF document text
    • http://mibajisokawetu.iblogger.org/warhammer_40k_ultramarines_transfer_sheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417648/normal_60000eab720f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500432/normal_5ff15e62261dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381766/normal_5fc6ca7c8d6cf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://368051e9-4199-40ea-b9a2-dc6e6f83cb3b.filesusr.com/ugd/6260fe_5aa2c3da1efa44f09cf9f107c84f2077.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc35f68a-5ff6-4fd5-8fec-4e550e7a6923/nemitetupubimopon.pdfIn PDF document text
    • http://notewewagegev.rf.gd/54991088757.pdfIn PDF document text
    • http://matewedidoxeber.onlinewebshop.net/8436878312.pdfIn PDF document text
    • https://6f672a44-e16c-4921-a0f1-e3781c0647c5.filesusr.com/ugd/bda22a_8101c78480cb434ebb02aece7dd0c512.pdf?index=trueIn PDF document text
    • http://meguwuzib.rf.gd/35145419020.pdfIn PDF document text
    • http://jamenafa.epizy.com/jdk_8_filehippo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de64ea0e-600d-43bf-bc05-78b09d1a5e2d/dajurijutatik.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_off0000de48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE48 5480 bytes
SHA-256: aef8fe807e43875a064573aedaa71dfceb289c3d5601fb5a59d8e44012b36290
font_01_sfnt_off0000f0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E6 10092 bytes
SHA-256: e3bf2c1a06479e502528a2f43153a423af30ebc763b1b2ab4e4b95cf7ad074b1