Malicious PDF — malware analysis report

Static analysis result for SHA-256 52dd715e38bba715…

MALICIOUS

PDF

107.4 KB Created: 2021-02-15 16:29:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 5a3d7ddccdb0f69450736004c0afebe4 SHA-1: f1ee2812a0aee769e1d562ece9b83478e6b4aff3 SHA-256: 52dd715e38bba71578bf7c90a71142699de89b37bdf32dc8d2cddfb4ccc6e5cd
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, likely intended to redirect the user to a malicious site. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to exploit the user's trust through a deceptive lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/123?utm_term=troy+bilt+tb425cs+fuel+line+replacement PDF link annotation
    • http://neluvukod.22web.org/vtvgo_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/virurewev/egcGjJS/abalone_cove_beach_weather.pdfIn PDF document text
    • https://cdn.sqhk.co/saboxiwago/pidGXzF/gavatuvetibizosego.pdfIn PDF document text
    • https://cdn.sqhk.co/zokelofid/BGR9jjb/derikapewafifo.pdfIn PDF document text
    • http://revujutipisan.22web.org/ca_cpt_books_2018.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/gotijejaj/11035799196.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/60977437518.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/screwtape_letters_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/zojodupib.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/1365742862.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/high_school_students_report_card_comments.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/niwimasajonovuguwebudogip.pdfIn PDF document text
    • https://s3.amazonaws.com/padanivozeb/mapa_do_brasil_estados.pdfIn PDF document text
    • http://kuzipewas.rf.gd/13225327173.pdfIn PDF document text
    • http://kojomazudogog.epizy.com/playerunknown_s_battlegrounds_game_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/income_and_expenditure_statement_template_south_africa.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_off0001657e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1657E 5696 bytes
SHA-256: dabca01019b8ab57ab37850c0a3cefc4abbd69ad05549617906272906aff7a3c
font_01_sfnt_off000178e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178E0 11572 bytes
SHA-256: 8965cfe87d4a0b7afed387df415cf665c864c6aa23fbf81e13cd6bc8e0633042

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