Malicious PDF — malware analysis report

Static analysis result for SHA-256 b858ffc1b5849f5e…

MALICIOUS

PDF

80.4 KB Created: 2021-02-15 20:45:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: cffea83c71dbe69f367610386f3f8193 SHA-1: 92e700ebb27961718bc1c1e03f151c962759c30d SHA-256: b858ffc1b5849f5e68658ba733219833f39e8fa08f8fd5a2fb3b01a9a75f2ecb
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://maypoin.ru/wix?keyword=photo+editor+emo+hair PDF link annotation
    • https://koxepaje.weebly.com/uploads/1/3/5/3/135350813/8a17afc752f253a.pdfIn PDF document text
    • http://resimpub.com/wigufiwibulepejuxabafdfg2.pdfIn PDF document text
    • http://zekabor.iblogger.org/subject_in_formal_letter_writing.pdfIn PDF document text
    • https://vusuvorolom.weebly.com/uploads/1/3/4/5/134501440/4fe48.pdfIn PDF document text
    • https://bafupenog.weebly.com/uploads/1/3/4/1/134131575/3736489.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_5fd0bb955e37d.pdfIn PDF document text
    • https://vuzaruluweketex.weebly.com/uploads/1/3/4/4/134478477/40d45a0fc137fe.pdfIn PDF document text
    • http://atomyimperial.ru/wawitemofaxeboyl4q1.pdfIn PDF document text
    • http://prequester.online/460964142703lsdg.pdfIn PDF document text
    • https://jutarufuro.weebly.com/uploads/1/3/0/7/130775772/kopanelijedu_kebodu.pdfIn PDF document text
    • http://wacc-cat.org/medical_term_list5kov3.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/bamepofewalada/pay_slip_in_excel_sheet.pdfIn PDF document text
    • http://zubeleboju.epizy.com/66491892659.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/26095749851.pdfIn PDF document text
    • http://gofirog.epizy.com/fejife.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/vuranalalivesoridazi.pdfIn PDF document text
    • http://namajuve.epizy.com/reformat_code_visual_studio.pdfIn PDF document text
    • http://wisiver.rf.gd/43782187658.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_off0001007f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007F 4856 bytes
SHA-256: 22eb94697549089fbfd42d18b0c8e6ccf12c15af16c689214b7ae5e9c312b951
font_01_sfnt_off000110d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D0 10744 bytes
SHA-256: a06f061dd6a6c356bcc1711256116bb7a9a624cb9a0ba722b25f412364f3ff20