Malicious PDF — malware analysis report

Static analysis result for SHA-256 925ab68c26dbce0f…

MALICIOUS

PDF

76.8 KB Created: 2021-03-20 20:30:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 096bc27c851599c365f64bc09b4e3124 SHA-1: 15baae6ac8fb710e3d5f5ae068c9196cd91192c2 SHA-256: 925ab68c26dbce0fc356afb5443f133b23ff6cc56d03bb830b1962ab87361b81
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'seumenha.ru', which is likely used to host a phishing page. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site for credential harvesting or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/award?keyword=tax+collected+at+source+pdf PDF link annotation
    • http://makedctl.site/basic_helicopter_aerodynamicsx30tu.pdfIn PDF document text
    • https://cdn.sqhk.co/lilajibusizu/iiSgftD/megasagusibizovavivokop.pdfIn PDF document text
    • http://momarivido.mypressonline.com/business_email_writing_samples_free.pdfIn PDF document text
    • http://evgeniy-semenenko.ru/238046583476dx94.pdfIn PDF document text
    • http://fogozuvonuw.66ghz.com/alien_periodic_table_worksheet_answers.pdfIn PDF document text
    • http://xakuneferufilew.iblogger.org/metered_dose_inhaler_instructions.pdfIn PDF document text
    • http://fuxanujibiz.mygamesonline.org/97938278302.pdfIn PDF document text
    • https://cdn.sqhk.co/popuzanuguw/cKhb4nu/beavers_bend_lake_fishing_report.pdfIn PDF document text
    • http://retapadu.medianewsonline.com/couples_painting_with_a_twist_near_me.pdfIn PDF document text
    • http://sunufosabupes.scienceontheweb.net/81465496234.pdfIn PDF document text
    • https://cdn.sqhk.co/genizataxom/jeiczjj/kofemig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xadokij.epizy.com/how_to_bypass_salus_thermostat.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/play_xbox_one_on_android_tablet.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/garmin_etrex_30x_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/zunenijolipibaneguvup.pdfIn PDF document text
    • http://vujoxamafo.epizy.com/medicare_part_b_covered_preventive_services.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/kelanafanusalo.pdfIn PDF document text
    • http://gozidonozali.myartsonline.com/5516969872.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/manual_or_automatic_transmission_more_reliable.pdfIn PDF document text
    • http://wazaranugaxexok.rf.gd/ryobi_10_amp_7-1_4_inch_sliding_miter_saw.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/vejoxexuxak.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/abo_sadam_whatsapp_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/plane_and_solid_shapes_worksheets_kindergarten.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_off0000ea33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA33 5164 bytes
SHA-256: 5e0f3516686922ead164587ac33c696d1ef03773822af07ae641f52d4983ad16
font_01_sfnt_off0000fbd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD3 11676 bytes
SHA-256: d516acb66f3c40cd6c0e89f6c95b2f557483bd08b79689101a5655d8ea1b7795

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