Malicious PDF — malware analysis report

Static analysis result for SHA-256 403547245a4cc446…

MALICIOUS

PDF

111.3 KB Created: 2021-03-13 17:54:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4d6fb4dbaf22fcea79e6150fe5923269 SHA-1: a91ef6e2c2c4e0d65d00856320f3be1d9b456a25 SHA-256: 403547245a4cc4464a045d8027f757296249309e6eeb65ba2154642b5da265c7
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit user curiosity or trust to redirect them to a malicious site.

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://xezojetit.ru/strik?utm_term=are+readers+digest+books+worth+anything PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384652/normal_602058d635dc6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379859/normal_5fedfea707fbb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445745/normal_5fcfb86c4ca41.pdfIn PDF document text
    • http://zawopim.mygamesonline.org/asme_y14._5m_2020_book.pdfIn PDF document text
    • http://gejulavofanutar.mygamesonline.org/how_to_watch_wu_tang_an_american_saga_without_hulu.pdfIn PDF document text
    • http://bowemesuzot.iblogger.org/46618131153.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485698/normal_602381d8f3369.pdfIn PDF document text
    • http://bexemusu.mypressonline.com/18453135479.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/rutufokedizon/42601291321.pdfIn PDF document text
    • http://gonegexunu.myartsonline.com/fl_studio_12_tutorial_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/aws_devops_certification_dumps.pdfIn PDF document text
    • http://vamavaremimot.atwebpages.com/best_mop_robot_2020.pdfIn PDF document text
    • http://dovunufesesiz.onlinewebshop.net/89303976768.pdfIn PDF document text
    • http://derusevar.rf.gd/posixagowazizunafetaniroj.pdfIn PDF document text
    • http://tosurok.myartsonline.com/matulobawijegudexem.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/nikon_coolpix_p510_charging_time.pdfIn PDF document text
    • http://puribisipup.atwebpages.com/bobiwebavavitoze.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/xazugalugiremavekituzimi.pdfIn PDF document text
    • http://witesenigo.atwebpages.com/75550590126.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/cheat_codes_warcraft_3_reforged.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/90608257678.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/duwovefasolosanasena.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_off00017655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17655 5444 bytes
SHA-256: e0a084a0c824e264ce6be3075e74e792ae22fa68d9c33655863ea312d9cd6b8b
font_01_sfnt_off000188eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x188EB 11748 bytes
SHA-256: 4e6a3c4f991ce3b8320ab1c538113f219554710acea0e2645ad37ade205e1991

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