Malicious PDF — malware analysis report

Static analysis result for SHA-256 b53594de0c56e92c…

MALICIOUS

PDF

82.8 KB Created: 2021-02-26 16:08:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: c775f8eb61afd798cdb7526743844221 SHA-1: 088688be16328a1b05ae9f5a93a9bfac47386858 SHA-256: b53594de0c56e92c86695a883ee78d0fbbb6542021cb31f1d779a940f6ec7dd7
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL points to a suspicious domain, likely a phishing or malware distribution site. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/strik?utm_term=is+the+secret+life+of+the+american+teenager+on+netflix+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393901/normal_6030d598f3cb4.pdfIn PDF document text
    • http://hookup755.fun/boss_bv9386nv_manualk39vs.pdfIn PDF document text
    • http://waystep.site/what_does_fob_shipping_point_mean_in_accountingy8qao.pdfIn PDF document text
    • http://futup.ru/483342128182ubx.pdfIn PDF document text
    • http://lasns.fun/cva_wolf_compact_muzzleloader_for_salegekdr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411245/normal_60299efb3ba21.pdfIn PDF document text
    • http://dutov.org/tinuxazegn8el.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421466/normal_6011c2b7d3a5b.pdfIn PDF document text
    • http://dajexori.mypressonline.com/how_to_draw_easy_and_simple_landscape_for_beginners_with_pencil.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/best_math_sat_prep_books_2020.pdfIn PDF document text
    • http://top-odejda.com/updgme_merit_list_2019_download5tubf.pdfIn PDF document text
    • http://copyrightreports.com/kixewedovec2e3l.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/zasepo/little_nightmares_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/tesosedore.pdfIn PDF document text
    • http://sogivuwe.onlinewebshop.net/xuroguxazirolovarozi.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/adamson_senior_high_school_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/corset_hoodie_missguided.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/35717166764.pdfIn PDF document text
    • http://faxiruvud.myartsonline.com/how_big_is_30_by_40_inches_in_feet.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/sabefekuwafubadetalus.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_off00010607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10607 5576 bytes
SHA-256: bdf28054073aa3b2847a8f03634383464b075570d9ca5592c9382010b879b1a7
font_01_sfnt_off000118db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118DB 10680 bytes
SHA-256: 0b519c2b22c8369be62019dbbe960b4ed745479ba471137926387eea182798fe

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