Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b371cb72d214f7e…

MALICIOUS

PDF

68.4 KB Created: 2021-03-18 00:33:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a86f217795b708e8c69fa52aa40c136 SHA-1: dba4341a820cb6ac5c07b71ff6a0d7c17f118157 SHA-256: 2b371cb72d214f7e4b39b376025a5c1b4a3631eeb0f32aa8be5cad1823f59e33
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve a secondary payload. The document body, though heavily obfuscated, appears to reference a manual, suggesting a lure to trick the user into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=peg+perego+gator+manual
    • http://zexaribamemavi.sportsontheweb.net/where_can_i_watch_free_willy_2_online_for_free.pdf
    • http://getdouche.xyz/oracle_pl_sql_developer_salary_rangew8oos.pdf
    • http://kevexupivuzovif.iblogger.org/88925788709.pdf
    • http://topplafond.xyz/robazojmhu2u.pdf
    • http://xabisafeb.22web.org/fetejokotob.pdf
    • http://pupigojoniru.mypressonline.com/list_of_adjectives_grade_4.pdf
    • http://masemodobugab.22web.org/petition_to_settle_personal_injury_claim_colorado.pdf
    • http://bimonetejatoleb.mygamesonline.org/vewobosagakujavabazi.pdf
    • http://zogoxadaxagan.iblogger.org/sample_english_vocabulary_test_with_answers.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9e5f23c2-ca35-4648-b38b-599043b31696/62179513577.pdf
    • https://uploads.strikinglycdn.com/files/7ee570fd-c3a8-4078-bf98-5891e4ed04bb/polk_audio_psw108_install.pdf
    • https://uploads.strikinglycdn.com/files/10b01069-ba6d-4076-8b81-fcc3697324c6/is_maggianos_open_on_christmas_eve.pdf
    • http://bepolujogox.atwebpages.com/informe_de_auditoria_de_sistemas_de_informacion.pdf
    • http://tivexedasabuxi.myartsonline.com/cavatina_stanley_myers_piano.pdf
    • https://uploads.strikinglycdn.com/files/69a4ac77-62a5-4a20-ada1-43227a51f260/73137587830.pdf
    • https://uploads.strikinglycdn.com/files/cc42fa7e-81dc-4d02-b231-fa49f0608c0a/86942934653.pdf
    • https://s3.amazonaws.com/fewifuwu/single_column_cash_book_format_in_excel.pdf
    • https://s3.amazonaws.com/bikikanafopavu/rogewoxojaputusewujefubuw.pdf
    • https://uploads.strikinglycdn.com/files/75c0c957-ea2c-4bbb-a2dc-eee8e9527923/bosch_axxis_washer_and_dryer_combo.pdf
    • https://uploads.strikinglycdn.com/files/9ecdf31f-93af-420d-a67d-cb3fb0aad41b/munulofotupomurozum.pdf
    • https://uploads.strikinglycdn.com/files/c4c6f569-dd17-4687-a79a-a00726326abd/52245278828.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d180.bin
ed11dd748ecc1b2af35d218d5f641d7d2c600210d7523683ab64ce48d05a20dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD180 4964 bytes
font_01_sfnt_off0000e24f.bin
7c0c8dcd6f09d60dedc0a119914684b5322e95f5343e5719da6d2bd6d78e72f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE24F 9980 bytes

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