Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d6a4eb8ee39feb7…

MALICIOUS

PDF

75.7 KB Created: 2021-02-07 19:24:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4ec5583e852427d5f98b4a9fad92f40b SHA-1: d4f811506f9f5418900dba318c0dcb83977e9ec2 SHA-256: 9d6a4eb8ee39feb7ff672090c756de244c03e8f96e5654ea89064997ddf88be1
96 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to 'baarspo.ru', which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, suggests a pretext of 'instruction' to entice the user to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/123?utm_term=first+class+petty+officer+association+instruction PDF link annotation
    • https://cdn.sqhk.co/gulanuwe/fjfinZp/big_head_football_champions_league_2018_19.pdfIn PDF document text
    • https://cdn.sqhk.co/pewovixosafu/hbLgdhb/nasimerop.pdfIn PDF document text
    • https://cdn.sqhk.co/rajemaramiw/ejihfwe/diwamuwipiki.pdfIn PDF document text
    • https://cdn.sqhk.co/rudixika/Fjehc9l/mortal_kombat_11_mileena_fatality.pdfIn PDF document text
    • https://cdn.sqhk.co/wepigosogo/ndfiihe/mimemiwixunitakumus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vobulag.rf.gd/digital_payment_system.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/oral_candidiasis_case_report.pdfIn PDF document text
    • http://wapudajikipidem.epizy.com/bajrangbali_aarti_video.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/reasonable_doubt_full_movie.pdfIn PDF document text
    • http://jetubomubiko.epizy.com/acuerdos_de_paz_en_guatemala_resumen.pdfIn PDF document text
    • http://mejavifoxeb.rf.gd/59689703687.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000def9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF9 4948 bytes
SHA-256: f94d049de680f4e10967f154e59cb005b5ab236b6f86ca7a4156e16b6b63be3d
font_01_sfnt_off0000efe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE0 10464 bytes
SHA-256: 15d237c6a8d4bd642e55293073738560385eb365c5618f613efe7887043b4630
font_02_sfnt_off000113c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C2 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378