Malicious PDF — malware analysis report

Static analysis result for SHA-256 6baa638e19c6dcc0…

MALICIOUS

PDF

82.9 KB Created: 2021-04-12 20:40:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f1d1fcb2ac10f784abeaf7e81e28791 SHA-1: 7ec06adbf7a93d31189ffb1de5ea88466343dc99 SHA-256: 6baa638e19c6dcc063fa989ddcb81a7cac10a8d15bb71edd15acc3577e685e33
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to 'botokaw.ru', which is likely used for phishing or to download a secondary payload. The PDF structure and embedded content suggest an attempt to disguise malicious activity within a seemingly normal document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://botokaw.ru/strik?utm_term=normal+anion+gap+metabolic+acidosis+acronym
    • http://sedogowisu.iblogger.org/36722677804.pdf
    • http://zitulexe.iblogger.org/angie_rolling_stones_chords.pdf
    • http://rimujitibux.mypressonline.com/endocrine_system_download.pdf
    • http://sadogiropi.mypressonline.com/livro_capites_de_areia_download.pdf
    • http://mapugukabazewu.scienceontheweb.net/infrastructure_as_code_azure.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jarirotexab/xarupovivosakulaxodinu.pdf
    • https://s3.amazonaws.com/kotodur/33608975759.pdf
    • https://s3.amazonaws.com/gonima/exercise_physiology_certification_study_guide.pdf
    • https://s3.amazonaws.com/davolazupivowi/success_principles_summary.pdf
    • https://uploads.strikinglycdn.com/files/7a9ce0bd-7c6a-4455-8e07-829798fda15d/razupazena.pdf
    • https://uploads.strikinglycdn.com/files/9dd891a0-71ed-4d04-a908-fcbd8ebbfd4d/how_to_set_braun_coffee_maker_auto_on.pdf
    • https://s3.amazonaws.com/rakabexozu/lawalalamalozajon.pdf
    • http://somasetowijo.myartsonline.com/arbitration_and_conciliation_bare_act.pdf
    • https://s3.amazonaws.com/taguxif/liwoso.pdf
    • https://s3.amazonaws.com/fumiposamisur/vililuxigovipufuvetu.pdf
    • http://rugizasuvodaw.rf.gd/51337819617.pdf
    • https://s3.amazonaws.com/ditiruz/free_printable_fax_cover_sheet_confidential.pdf
    • http://beminelo.rf.gd/46991634382.pdf
    • http://nisetekotixob.myartsonline.com/9793674439.pdf
    • https://uploads.strikinglycdn.com/files/e887bda4-daba-4c6e-b2df-efc3e2581213/is_complete_free.pdf
    • https://uploads.strikinglycdn.com/files/ac81514b-5308-49d4-b70c-8918a6dc0b19/giboxalabiravow.pdf
    • http://kababotatage.epizy.com/xomiruxitojexaxabolazip.pdf
    • http://sarijuwowu.rf.gd/zotufewinerenonoxituvug.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea05.bin
c80a2429b506c0be9806b3e5a8b2e3811c3eb4ec26c74044f9e97c29ab011cc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA05 5604 bytes
font_01_sfnt_off0000fcfa.bin
66a96b97e5f04e7de8a7f3fea3e16f1f7055a30d25a313f3c5f95e9c10a4eda2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFA 11956 bytes
font_02_sfnt_off0001261c.bin
c511f1f478ae1c7bf1e959d8853f3a9e02f546026896edd98adf7c93328dc34f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1261C 16320 bytes

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