Malicious PDF — malware analysis report

Static analysis result for SHA-256 373e78a43be4e078…

MALICIOUS

PDF

261.3 KB Created: 2021-03-17 11:04:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: ea3ee6a33a171c0e32e16dc2534b37a3 SHA-1: 4d6de7146fac9bbf34cb26c00f1016b5fa132d9e SHA-256: 373e78a43be4e078a254b1793662ec51c5a81c04b2527f0df77c86b05b850774
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that redirects to a suspicious domain, likely as part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://baarspo.ru/award?keyword=essential+mathematics+for+economics+and+business+2nd+edition+pdf PDF link annotation
    • https://zajevikafe.weebly.com/uploads/1/3/5/2/135297545/6704086.pdfIn PDF document text
    • http://lipexifinidoda.scienceontheweb.net/40901316648.pdfIn PDF document text
    • http://ecoterritory.store/38005243925jf16g.pdfIn PDF document text
    • https://govonomuvilikiw.weebly.com/uploads/1/3/4/6/134620083/5057110.pdfIn PDF document text
    • http://suzamakulamuj.mypressonline.com/35820573282.pdfIn PDF document text
    • http://giwitijudaleka.mygamesonline.org/joxomerisupe.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/1211890.pdfIn PDF document text
    • http://baltika-trans.com/youjo_senki_movie_torrentr7u7w.pdfIn PDF document text
    • http://damvglaz0.xyz/624423510782oydg.pdfIn PDF document text
    • https://kukibujez.weebly.com/uploads/1/3/1/6/131637652/sevefubenenit.pdfIn PDF document text
    • https://nawawedivoxoni.weebly.com/uploads/1/3/4/7/134719505/rubuwufumiwen-pilujev-kozasexosora.pdfIn PDF document text
    • http://nitapida.mywebcommunity.org/duvubilodijikufixagava.pdfIn PDF document text
    • https://xavimunemu.weebly.com/uploads/1/3/2/8/132815343/69b54d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vavadot.onlinewebshop.net/crime_statistics_in_south_africa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b3af4e4-31bc-457c-a034-a3b9a36ad8f2/how_to_thread_a_brother_sewing_machine_xl-5130.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f1e073d-78d1-48d7-b036-ddb3fe3f9884/3946979383.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/9472546307.pdfIn PDF document text
    • http://xuxerutiwuv.onlinewebshop.net/juwoxama.pdfIn PDF document text
    • http://muvekalufisu.atwebpages.com/niluroside.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_off0003c479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C479 5624 bytes
SHA-256: b9b71b21f560857a3c1a4f594e593aa97948a82f408cc00367949845e19a4291
font_01_sfnt_off0003d76c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D76C 13384 bytes
SHA-256: d674a0da51c02744dbcd18a9b6bc64f65dd5635c5f51c4a6bd60d0ab722072e5

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