Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5dbadfd0b51f444…

MALICIOUS

PDF

77.9 KB Created: 2021-03-13 23:12:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 231335ced2818e70c734574e13be49f3 SHA-1: 205bfe55345627df9328889ffdc83df5551ec1e1 SHA-256: e5dbadfd0b51f4449364c5db97d60585cc26f2333dd1e806f3b5b0a96f88fd16
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL, https://mezovuduw.ru/award?keyword=quest%25C3%25B5es+de+administra%25C3%25A7%25C3%25A3o+p%25C3%25BAblica+cespe+pdf, is likely used to redirect the user to a phishing or malware distribution site. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to exploit users through social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://mezovuduw.ru/award?keyword=quest%25C3%25B5es+de+administra%25C3%25A7%25C3%25A3o+p%25C3%25BAblica+cespe+pdf PDF link annotation
    • http://kewegagibemidaj.22web.org/minuet_in_g_major_anna_magdalena_bach_sheet_music.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/pewebopufupe/gopuravidimez.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/vonenafukuwuvibuki.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/roxisimidoxezanusuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5db4673b-7e0f-479c-ba6e-44a522d03991/64007233544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5532653b-3112-4d97-b7cb-952fa633d1cb/65248399260.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/46657252225.pdfIn PDF document text
    • http://buzuvemujogumob.epizy.com/zubimigadabikasijimis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcf52f76-1afb-419f-ae36-72e7035a924d/dalaf.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/equifax_credit_report_integration.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c680259a-fd3a-4cd2-9fee-a2ffadb3ba44/what_are_basic_crochet_stitches.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/ksca_cricket_ground_alur_pitch_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/673bd10f-e2e1-49d8-b7d7-4341a42cc363/nuwetilorulej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04c11f6a-2941-41e6-b793-f45c0cae601e/29104457457.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01a59ef8-e245-4e72-879a-89140f5267f8/lasko_tower_fan_ionizer_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d46ed1fa-9a25-40e0-96a3-136408b2f1e6/properties_of_exponents_examples_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/82000192489.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/96984003634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9a97381-b691-43b7-abc4-5b479704073e/atwood_gc10a-4e_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/21471867096.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab2914c5-3600-4a67-a952-990839b8f9bb/what_is_the_most_common_cause_of_mitral_stenosis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4808e710-d974-4715-9bff-9f578f4234a8/camping_merit_badge_requirements_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/fusilux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85692502-e7b8-4bba-ab61-2c76e6a9da80/bissell_poweredge_pet_hard_floor_corded_vacuum_81l2a_same_as_81l2t.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_off0000efb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB0 6336 bytes
SHA-256: b54c5ca8ead39d8c9f8971c211a1698fa3fcb2cf5ac3f7145c21b180e5e1800f
font_01_sfnt_off00010385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10385 11696 bytes
SHA-256: 347b9ad66a896438c15378e97c4b0f260c75475ed39125fb9304be9b5c79c6b6

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