Malicious PDF — malware analysis report

Static analysis result for SHA-256 22f8f014cd8e4eb8…

MALICIOUS

PDF

78.1 KB Created: 2021-03-23 09:21:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: de45f292816f0c0b07775d2f0809a0f0 SHA-1: 77b15bd94c785ebe70bec9801edd0aafa2bc38fe SHA-256: 22f8f014cd8e4eb8cd9a2f98413c7e1973d87ccec561f3d0b7796fd62f4cd065
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially harmful content, aligning with phishing and link farm tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://druttle.ru/award?keyword=neumonia+pediatria+pdf+elsevier PDF link annotation
    • https://babuzusevajuwo.weebly.com/uploads/1/3/4/8/134878483/sezogur.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/gioNnge/30924320558.pdfIn PDF document text
    • https://cdn.sqhk.co/wubofuse/gdecggp/32498086047.pdfIn PDF document text
    • https://towoxaji.weebly.com/uploads/1/3/0/7/130740158/puwowegulerunejixipi.pdfIn PDF document text
    • http://vuvabadiredowa.getenjoyment.net/convert_to_word_desktop_software_setup_crack.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/qCyRcJP/fdic_call_report_glossary.pdfIn PDF document text
    • https://dewufore.weebly.com/uploads/1/3/4/8/134857007/bekojatoxunimow_jajijunidawum_labelulusoxewo_madatosufaj.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/53177191938.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/hdhiwhc/najolizuvubifusazokewewik.pdfIn PDF document text
    • https://sitavekoked.weebly.com/uploads/1/3/5/9/135974486/398dc5323531d9.pdfIn PDF document text
    • http://fetedeju.mygamesonline.org/lavekadumewenabenesix.pdfIn PDF document text
    • https://cdn.sqhk.co/nuduniguwufo/iUqq5vk/suxunokuroz.pdfIn PDF document text
    • http://kimiter.medianewsonline.com/calendario_mondiali_calcio_femminile_2020.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/wupuxus/repuze.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/zosor.pdfIn PDF document text
    • http://vavadot.onlinewebshop.net/arrangement_of_elements_in_the_periodic_table.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/vuzojoleratubomiw.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/fegotomig.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/how_to_find_the_mean_median_mode_range_and_standard_deviation.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/huckleberry_finn_chapter_4-7_summary.pdfIn PDF document text
    • http://dirazonun.myartsonline.com/nadasowon.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/jivaletu.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/40877336681.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_off0000f358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF358 5216 bytes
SHA-256: 73298b1aa1283bedc86c43960223dfdbfe2b8939ae0dee724501f1f568bbfb3a
font_01_sfnt_off00010509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10509 11204 bytes
SHA-256: 4ef48c56f642ca55c80764a0a922263614f58aabe23085b825a8ec6fe87f503c

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