Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbbe2f62a336379b…

MALICIOUS

PDF

107.3 KB Created: 2021-02-15 00:27:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6bd3cf8ce6d192bf0644cf7aaed39dc1 SHA-1: 2b7d90103463b025628ded1b39d648ee3004a817 SHA-256: bbbe2f62a336379b2d1ef8e03acf5b4ae7439466f9e4e419045494c16070ebe8
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/123?utm_term=the+traders+guide+wv PDF link annotation
    • http://apeech.ru/como_cerrar_sesion_messenger_androidif18w.pdfIn PDF document text
    • http://boldly-grow.com/9239958675mfw0y.pdfIn PDF document text
    • http://exampl1214.com/bass_guitar_pentatonic_scaleswvd86.pdfIn PDF document text
    • http://grinallex.shop/64473669491dg0d8.pdfIn PDF document text
    • http://esagafow.fun/rice_burner_mod_apk_revdlswlb7.pdfIn PDF document text
    • https://pijuvadugodawa.weebly.com/uploads/1/3/4/3/134307721/f9837023e.pdfIn PDF document text
    • http://fordist.ru/wixiribakemuy0ene.pdfIn PDF document text
    • http://look-hotel.com/sixelezalenokqs1.pdfIn PDF document text
    • http://dirtygirl.fun/footloose_musical_full_scriptxle2x.pdfIn PDF document text
    • http://dodemawaj.iblogger.org/infosys_bpo_annual_report_2019.pdfIn PDF document text
    • http://organic100.fun/wixeselajopip2zpc.pdfIn PDF document text
    • http://dugules.iblogger.org/xudofitibovinelumunozez.pdfIn PDF document text
    • https://getukesi.weebly.com/uploads/1/3/4/7/134735407/53bdbe528323d.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/mafavuzenoliki/fofipenukaku.pdfIn PDF document text
    • http://fisuzes.epizy.com/wufogalovug.pdfIn PDF document text
    • http://tabojiterakan.rf.gd/97163505822.pdfIn PDF document text
    • http://gadoxijumulop.epizy.com/animal_farm_pre_reading_questions_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/20113841444.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/78124303827.pdfIn PDF document text
    • http://xifenarubomes.rf.gd/73164071185.pdfIn PDF document text
    • http://sinodigewenewe.rf.gd/cardi_b_bodak_yellow_spanish.pdfIn PDF document text
    • http://duxuramubot.epizy.com/deregewek.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_off000166f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166F3 5156 bytes
SHA-256: df23d5ff30dc6bd0b3473718157fb5ca653adbbd1bfcbc52411fec9c99b0dfb3
font_01_sfnt_off0001788d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1788D 11600 bytes
SHA-256: cc2025853879ebb6044f2984ccd27e37cd37c10f856ef569a6bf9022105e9cac

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