Malicious PDF — malware analysis report

Static analysis result for SHA-256 f59d3265ef1a4e3d…

MALICIOUS

PDF

118.2 KB Created: 2021-02-04 10:15:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 08b03896b88139524281c2e7a9abec05 SHA-1: 8915bec24adc072fef8369c09c940fb469eba249 SHA-256: f59d3265ef1a4e3d3e3bbabf8d1fbc946c935ffd2538a1407fdfffb47b1c2d45
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URI pointing to a suspicious domain, 'seumenha.ru', which is likely used to host malicious content or phishing pages. No scripts were extracted, but the presence of external URIs and the overall detection suggest a phishing or malware distribution attempt.

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://seumenha.ru/123?utm_term=joule%2527s+experiment+thermodynamics PDF link annotation
    • http://virona.org/kuvowerogiroreverx99a9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451039/normal_5ff49a57d1848.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418786/normal_601065385091e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476782/normal_6003338a6d83b.pdfIn PDF document text
    • https://cdn.sqhk.co/sewizefaxiki/gAfNYgf/16687534446.pdfIn PDF document text
    • https://cdn.sqhk.co/jetirivotu/wpujfhf/kidz_bop_live_2020_tickets.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/PQggiez/waves_autotune_real_time.pdfIn PDF document text
    • http://filmera.ru/jasper_reports_new_line_in_text_fieldmejls.pdfIn PDF document text
    • http://icub.tech/2470289819kuis7.pdfIn PDF document text
    • http://connexion-amelii.xyz/biology_mcq_books_free_downloadvfilv.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/nitizobuv/free_2018_calendar_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/como_finalizar_email_formal_em_ingles.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/84732645091.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/xirusepiwofisel.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/1102974207.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/arjuna_arjuna_andhi_mazhai_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/wijurekumagatajalimuz.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/nitifajuximi.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/dijejovez.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001a424.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1A424 22480 bytes
SHA-256: 77ee31da1bfa531ff8aba7598fb1325c8837f4dfabf152cdfaf60414ba8a329a
font_00_sfnt_off0001649b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1649B 5508 bytes
SHA-256: 240ff420a8b9ad8b7b4420fdc609065d185fa949081b45744dd0d587d44beb37
font_01_sfnt_off00017739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17739 13312 bytes
SHA-256: c9c1cd48e0c8757efb06cc3add6cd8f76c3ba8e771e70072ddf24357048a2ee5

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