Malicious PDF — malware analysis report

Static analysis result for SHA-256 12b9944b1981aa38…

MALICIOUS

PDF

77.4 KB Created: 2021-03-22 02:14:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: deb9cf0294a1b349469b5f71b0e91da3 SHA-1: e790159550ea77736edc3b3bcaaf3cb17d87ba75 SHA-256: 12b9944b1981aa383f362b94420f67019d2506585786e929c104e0cbb4b4710a
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is likely intended to redirect the user to a phishing or malware distribution site. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing lure disguised as an IELTS practice test. No scripts were extracted, but the presence of external URIs suggests a download or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/123?utm_term=ielts+listening+practice+test+with+answers PDF link annotation
    • http://negedibomul.sportsontheweb.net/how_do_i_find_someone_in_australia_for_free.pdfIn PDF document text
    • http://pewekelexu.mygamesonline.org/rockwell_studio_5000_vs_rslogix_5000.pdfIn PDF document text
    • https://xofiwilo.weebly.com/uploads/1/3/1/4/131453946/wisud.pdfIn PDF document text
    • https://sewogasi.weebly.com/uploads/1/3/1/1/131163712/8b2d3100734947.pdfIn PDF document text
    • http://gubixazolela.sportsontheweb.net/22699568986.pdfIn PDF document text
    • http://zokidinodajives.getenjoyment.net/skil_cordless_worm_drive_circular_saw.pdfIn PDF document text
    • http://sawedes.mywebcommunity.org/sodetafejazijukojikisog.pdfIn PDF document text
    • https://wevuviwujito.weebly.com/uploads/1/3/1/6/131636984/5391815.pdfIn PDF document text
    • http://mopexaxurip.getenjoyment.net/70099503570.pdfIn PDF document text
    • https://fawofasoz.weebly.com/uploads/1/3/1/4/131454040/tisijuvewajitas.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/saziwijaxodav/fobuvitorimufetudelam.pdfIn PDF document text
    • http://zuvujivir.rf.gd/impossible_test_christmas_answers_make_a_cookie.pdfIn PDF document text
    • http://luzeparuzibez.rf.gd/4liker_latest_version_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/wordpress_custom_login_page_plugin.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/polycom_soundstation_2_non_expandable.pdfIn PDF document text
    • http://vegozamefokim.rf.gd/84081614193.pdfIn PDF document text
    • http://zuwukab.rf.gd/pictograph_worksheets_5th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/45522397833.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/how_does_germination_affect_respiration_rates.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/razafuxibiw.pdfIn PDF document text
    • http://guxejusoselota.myartsonline.com/sistema_endocrino_que_es.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_off0000efd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD7 5224 bytes
SHA-256: 0f0d780520b2b9e1ad17f458607d7d43a99779d5bb4dd8569f512299ded98847
font_01_sfnt_off000101ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AB 10952 bytes
SHA-256: d427947c59662317afac27af7b49013afd052244d3fb6b5dce495314440d03e7

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