Malicious PDF — malware analysis report

Static analysis result for SHA-256 a32054bd1baa6542…

MALICIOUS

PDF

70.3 KB Created: 2021-03-28 01:11:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 2a833759103e3d919fbcd1be8e8db768 SHA-1: 9441e48bb5a986fc26f5714aee32b79c8af5da92 SHA-256: a32054bd1baa65420871cc8f7486a9f1a8d2b1527c3507705a6690787f77fbe3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1105 Ingress Tool Transfer

The PDF contains a large number of external links, many pointing to suspicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to sites hosting malware or phishing content. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic confirm the document's purpose is to drive traffic to external resources.

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 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://nipisod.ru/123?utm_term=app+answers+math+questions PDF link annotation
    • https://rurusoweloxefug.weebly.com/uploads/1/3/3/9/133989150/3ca263d3a8125.pdfIn PDF document text
    • http://mevesepegubisis.scienceontheweb.net/fun_warm_up_activities_for_adults_esl.pdfIn PDF document text
    • http://istlan.space/ginalopelutuxefulizvhf33.pdfIn PDF document text
    • http://cheapkeys.site/analysis_of_variance_excel_sheethlffl.pdfIn PDF document text
    • http://gadokuzepot.22web.org/applying_for_an_internal_position_email_template.pdfIn PDF document text
    • https://notaxivarem.weebly.com/uploads/1/3/4/6/134633458/lesilapemipeg_sukajek_woloxejevurulu_joxuvumegoza.pdfIn PDF document text
    • http://sell-toclick.online/75426108572iys0a.pdfIn PDF document text
    • http://popijizixoxovoj.iblogger.org/issuu_downloader_robson.pdfIn PDF document text
    • http://jamotovoxut.mywebcommunity.org/dezesok.pdfIn PDF document text
    • http://busibear.com/masopubipodezibefanudorewvr342.pdfIn PDF document text
    • http://1xbet-football.fun/how_to_reset_my_motorola_baby_monitorwdijo.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/xarojapi/wifamisibilofodefi.pdfIn PDF document text
    • http://tumevadokopeki.rf.gd/mojutejabumomifib.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/19559341272.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/fizeropuvakedudipuxafox.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/dell_optiplex_7010_chipset_drivers.pdfIn PDF document text
    • http://kobelitorapojop.rf.gd/99950776162.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/52734468521.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/bodmas_sums_for_grade_6_with_answers.pdfIn PDF document text
    • http://tosijikis.onlinewebshop.net/pupineb.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_off0000d653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD653 5236 bytes
SHA-256: afe798d41e5d460791a7fe08cc997bb750b41db4180eaea473d7b5f1911e36f4
font_01_sfnt_off0000e80e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80E 10196 bytes
SHA-256: 440b229a1031f6858fc7174beb6002f7af0f545abf56474e1dde5cec157e1d4f

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