Malicious PDF — malware analysis report

Static analysis result for SHA-256 53d0e6d29a729a9b…

MALICIOUS

PDF

76.4 KB Created: 2021-02-14 14:52:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 63062586a2edbcc0873347161f1f8c28 SHA-1: a9eaa8e2ce448c205006c5da9699051dc95dba60 SHA-256: 53d0e6d29a729a9bf66d5125efab8d97adedc8fa368cf95eef47fad6a133d2da
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains text suggesting it is an entrance exam form, aligning with a phishing lure. It embeds external URIs, with the primary one being `https://jottigo.ru/aws?utm_term=b.+ed+entrance+exam+form+2019+rajasthan`. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://jottigo.ru/aws?utm_term=b.+ed+entrance+exam+form+2019+rajasthan PDF link annotation
    • https://cdn.sqhk.co/jirudumom/hXhcje1/gezenanarapuforopa.pdfIn PDF document text
    • http://xiravudes.22web.org/microsoft_word_calendar_template_january_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392853/normal_601babc3c6026.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392871/normal_5fee390d85d82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375209/normal_5fc716e45ff91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459625/normal_5ff323f9708d4.pdfIn PDF document text
    • http://tesazidon.22web.org/baidu_browser_pc_free.pdfIn PDF document text
    • https://cdn.sqhk.co/mogujawogo/eCgiZtU/animal_coloring_color_by_number_paint_by_number.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473359/normal_5fd13056e0459.pdfIn PDF document text
    • https://cdn.sqhk.co/bosesegivu/zFJichh/58884919980.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/GidKhhx/dasesoxekuledu.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/rivazixexuguri/differential_calculus_for_engineering.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/difference_of_two_squares_worksheet_tes.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/mizawafogakutizire.pdfIn PDF document text
    • http://nipuxedexup.epizy.com/bewakoofiyaan_film_song.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/bharat_mata_ki_aarti.pdfIn PDF document text
    • http://dolasuwukino.epizy.com/kadepewibokadugotemelej.pdfIn PDF document text
    • http://vizepojuduw.rf.gd/7439537198.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/suwuwaxixebuvo.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/naguwikisibugudu.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/bass_boosted_songs_audio.pdfIn PDF document text
    • http://gezexibubaju.rf.gd/cantilever_pool_deck_forms.pdfIn PDF document text
    • http://wapinogure.epizy.com/plastazote_foam_sheets_uk.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_off0000e874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE874 5936 bytes
SHA-256: 12a98e9e9382cb228281c33d8dd16c2c42ea44c0e16a9e8aca7357ef799f57f5
font_01_sfnt_off0000fc9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9B 10992 bytes
SHA-256: 899c4dcbc7072e6256d1e58874d1d1acded4e0ce14cb1a8dc9b259a33bffb275

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