Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb5d3b76db8861f5…

MALICIOUS

PDF

81.6 KB Created: 2021-03-18 17:12:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 1121295d69b9604133b1af9a7d7523be SHA-1: 92e38847062ca779393bbf3eae6c4598b5f3746c SHA-256: bb5d3b76db8861f54477e262e294d590ecc452415ad9da214148d234f6dbd0e5
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a domain associated with phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text fragments that suggest a lure, possibly related to 'babbling stage pdf'. The presence of multiple links on disposable hosting further supports a link farm or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://midufefew.ru/award?keyword=babbling+stage+pdf PDF link annotation
    • http://leledup.mypressonline.com/vuzokekebe.pdfIn PDF document text
    • http://gedatidigog.sportsontheweb.net/car_buying_checklist_app.pdfIn PDF document text
    • http://milansit.space/vmware_workstation_free_download_for_windows_server_2012_r2eibw9.pdfIn PDF document text
    • http://detonic-buy.website/verizon_4g_lte_frequency_band7lt5s.pdfIn PDF document text
    • http://taygerr.com/85763097496dcsz9.pdfIn PDF document text
    • http://sozimaxetupow.mywebcommunity.org/descargar_biblia_reina_valera_1960_para_android_gratis.pdfIn PDF document text
    • http://ziwixan.iblogger.org/xovigerumukezogu.pdfIn PDF document text
    • http://site-shop.xyz/nemelalabiu1xot.pdfIn PDF document text
    • http://zizubur.22web.org/zawejowigezured.pdfIn PDF document text
    • http://wiregabjuk.fun/personal_information_worksheet_for_studentsi57e1.pdfIn PDF document text
    • http://fikunigogijori.22web.org/apache_tomcat_6_for_mac_os.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://murutasugotap.epizy.com/piwop.pdfIn PDF document text
    • https://6f0a1f77-3195-4c90-aae7-8e5805bb56bd.filesusr.com/ugd/f94fd0_351827339b7e433fa322e95e413f7f94.pdf?index=trueIn PDF document text
    • http://xalolowoko.epizy.com/rizimurixuvijorijewiw.pdfIn PDF document text
    • https://8d40832c-2e2b-4284-8151-bb35a16d80ac.filesusr.com/ugd/05d014_827e34ae528c4b5fbb830831afb7e31b.pdf?index=trueIn PDF document text
    • http://biborufa.epizy.com/xupujijiweveponepeni.pdfIn PDF document text
    • http://wororezijetixa.atwebpages.com/napiritiwosan.pdfIn PDF document text
    • http://nimunofat.epizy.com/jijazolofejoxekitar.pdfIn PDF document text
    • http://tejutixofefadi.rf.gd/critical_applied_linguistics_a_critical_introduction.pdfIn PDF document text
    • http://mefomoximene.rf.gd/50489701038.pdfIn PDF document text
    • http://xegafezoze.rf.gd/lorubozibafaxokulobodoj.pdfIn PDF document text
    • https://8533cbf3-c0d6-400c-bdf8-8ca38cf0242b.filesusr.com/ugd/135178_335f5a9343914d998b21da1e58653437.pdf?index=trueIn PDF document text
    • http://lulawutereb.rf.gd/dura_ace_di2_groupset_price.pdfIn PDF document text
    • http://zuwosopawekaz.rf.gd/dejunobixika.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10439 5304 bytes
SHA-256: d53ffdb5e9ae2f9d5c3f0ba2ff4bdb1a2509c0262d6d14a0a6544600c5c67a1f
font_01_sfnt_off00011656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11656 11128 bytes
SHA-256: 11f61e9c9044cc5ef941c9c63c2c978d6c96463e7566db2b7c684424a1daabaf

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