Malicious PDF — malware analysis report

Static analysis result for SHA-256 42de9552a0f57576…

MALICIOUS

PDF

104.7 KB Created: 2021-03-16 06:43:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: fcd86f63f9af0acabcb4a8bef0d945ba SHA-1: 24e9fa8419b56ee5f1a008e493d32f0b60e03d82 SHA-256: 42de9552a0f57576291ad3c98eee8584051dc2d8794c9d39d2e1a3a08618b11d
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to 'baarspo.ru', which is flagged as a potential phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'workbook for auto mechanics fundamentals pdf', suggesting a targeted phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/award?keyword=workbook+for+auto+mechanics+fundamentals+pdf PDF link annotation
    • https://cdn.sqhk.co/dujuxafetot/wyifyhi/hockey_mania_nhl_khl_worlds.pdfIn PDF document text
    • https://cdn.sqhk.co/goxepijikun/4hcSdeU/driving_zone_2_mod_apk_0._56.pdfIn PDF document text
    • https://cdn.sqhk.co/wetaxawirewu/FgiPpY6/prank_call_app_free.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/Pihghgd/b._ed_last_date_form_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/sikibeve/Gtgcjga/wepadopowojimixosopitelas.pdfIn PDF document text
    • https://cdn.sqhk.co/gizukakom/Lhiigjd/tonidoj.pdfIn PDF document text
    • https://cdn.sqhk.co/xixewebirike/libfBy2/diwolekovedotifelevugine.pdfIn PDF document text
    • https://cdn.sqhk.co/merabuvi/evjfagd/zivavokuvif.pdfIn PDF document text
    • https://cdn.sqhk.co/novitovikor/pge2Rgi/turbo_river_racing_mod_apk_download.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/gizonukorad/up_b._ed_application_form_2019_fees.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/88153273155.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/74004083703.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/hungry_shark_appvn.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/abstract_reasoning_practice_test.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/helvetica_new_bold_font.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/ft-450d_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/free_design_templates_illustrator.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/coutinho_liverpool_formation.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_off00015b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B3A 5612 bytes
SHA-256: 404ef2079ed72921b7fbabf694acff97e8198403e200dafcb448276ddfa5b91a
font_01_sfnt_off00016e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E35 11368 bytes
SHA-256: 5ab581ff51dd519c98e79fdefbef3094ed4e94900157b98ab21c3b8463d73e44

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