Malicious PDF — malware analysis report

Static analysis result for SHA-256 b804046c91481969…

MALICIOUS

PDF

76.0 KB Created: 2021-03-22 14:56:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 23da97e51052d44accd02d3e9a1840fc SHA-1: 5afc8afd6b8fa609dc21bdbba28f8c93354e9bcd SHA-256: b804046c914819692e5eefa015874ba641a424fd8eaf3b3f1be618f903d872cd
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, suggests a lure related to educational worksheets. The presence of external URIs and the overall detection by security tools indicate a phishing or malware distribution 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://mezovuduw.ru/wix?keyword=balancing+chemical+reactions+review+worksheet+answers PDF link annotation
    • http://sezafisiru.22web.org/steve_belichick_book.pdfIn PDF document text
    • https://xaverawigidun.weebly.com/uploads/1/3/4/4/134437914/1106071.pdfIn PDF document text
    • http://dalkomis.website/free_cakewalk_sonar_8_full_versionnbbju.pdfIn PDF document text
    • http://akillidestekbasvuruformu.online/wudexett8q9.pdfIn PDF document text
    • https://vixawesomuwevu.weebly.com/uploads/1/3/5/3/135387162/valubelizep.pdfIn PDF document text
    • http://hempmap.ru/73355689633vs3o9.pdfIn PDF document text
    • http://timelessdecorum.com/9557010524970y.pdfIn PDF document text
    • https://ziwobusomuka.weebly.com/uploads/1/3/1/6/131607005/754e1aa26c00.pdfIn PDF document text
    • https://wipasajumavadus.weebly.com/uploads/1/3/4/7/134775966/difarajoxuzop.pdfIn PDF document text
    • https://nozatagi.weebly.com/uploads/1/3/3/9/133986497/zumowexinosemurufes.pdfIn PDF document text
    • https://janolonixo.weebly.com/uploads/1/3/3/9/133987325/getoxipi_tosukaputo_lopigesivozi_xuniwatomu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ramenejepom.rf.gd/wekurolonuselivubiwofed.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/anestesia_epidural_y_raquidea.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/singh_is_bling_movie_english_subtitles.pdfIn PDF document text
    • http://pakewerulawe.rf.gd/15017146933.pdfIn PDF document text
    • http://wurupebolem.rf.gd/who_is_playing_the_darkling_in_shadow_and_bone.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/samsung_android_file_transfer_for_windows_7.pdfIn PDF document text
    • http://puwovejivu.rf.gd/xigeraf.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/calibre_ebook_reader_ipad.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/minecraft_vanilla_server_1._12.pdfIn PDF document text
    • http://miwexosekapofaj.rf.gd/tratamiento_para_candidiasis_en_hombres.pdfIn PDF document text
    • http://xakosafejel.epizy.com/plague_inc_hack_apk_ita.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_off0000eb8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8A 5476 bytes
SHA-256: eefb89fb18886dd01fbf4a80813090e1a7e9601bca37a59fb6361676b70df305
font_01_sfnt_off0000fe12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE12 10552 bytes
SHA-256: 6d537e419fe89cd0c12baa5f6d91d4bbd57043b215c87d3571eab0be4c93a03e

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