Malicious PDF — malware analysis report

Static analysis result for SHA-256 de2d73e7ddb05ef2…

MALICIOUS

PDF

95.6 KB Created: 2021-02-11 23:43:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bebca588545107df1c83522f9dc9ad2f SHA-1: abfa7398b084109e2c7e315011e667c563919759 SHA-256: de2d73e7ddb05ef24fb3a451d18350d93b60356ebc6d93f18964cd1d6d003933
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external links, such as 'https://baarspo.ru/123?utm_term=los+angeles+craigslist+furniture', suggests a link farm or redirection strategy. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a phishing or malicious payload delivery scenario.

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 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.
  • 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://baarspo.ru/123?utm_term=los+angeles+craigslist+furniture PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4374022/normal_6004b12c081a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465398/normal_5ff0f3950f5d7.pdfIn PDF document text
    • http://dkmz1.club/u_mobile_apk_5._1._0_downloadm4ls1.pdfIn PDF document text
    • http://segekofolopumav.iblogger.org/dovukifusofegisuvakebanin.pdfIn PDF document text
    • https://kekufekogaj.weebly.com/uploads/1/3/4/7/134768560/jadefisonolok.pdfIn PDF document text
    • http://mon-cmbretagne.com/como_conseguir_o_monedero_em_pokemonoqytz.pdfIn PDF document text
    • http://lotsmen.com/ice_freestyle_rap_beat_instrumentalvll68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367922/normal_5fef7b1f06bc1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444875/normal_5fe252fa6da6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393883/normal_5fe9b35341d05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449793/normal_60210a856d70a.pdfIn PDF document text
    • http://storezone.info/key_highlights_of_interim_budget_2019j0fr6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480383/normal_5fe8a702cca15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464070/normal_6005cd6117b97.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://biwodonugawodil.rf.gd/angiosperms_vs_gymnosperms_worksheet.pdfIn PDF document text
    • http://vizawog.epizy.com/sunakuveraxube.pdfIn PDF document text
    • http://kefujuvaw.epizy.com/2019_excel_calendar_template_editable.pdfIn PDF document text
    • http://sesunofopum.epizy.com/663341940.pdfIn PDF document text
    • http://bisubop.epizy.com/acls_guidelines_for_antiplatelet_and_fibrinolytic_therapy.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_off000137d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137D1 4988 bytes
SHA-256: 4276979c23f67b7da7ec5c87504b7e59b059bc69d9a0f7070bcfcac4290a4d0c
font_01_sfnt_off000148e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148E1 11912 bytes
SHA-256: 919ddfa8b0774a7ab6a53009c9c888eef8570693768da5520465d9985220e48a

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