Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a552e724863e851…

MALICIOUS

PDF

76.4 KB Created: 2021-02-17 17:52:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 309cd5dd2c68f6983cbcccbaf24bd291 SHA-1: e512e9ee6955ed5b9dd9718e563ae68ea2cf5b39 SHA-256: 6a552e724863e851bee6ec47075bb04a28afd5bafed4d76b0f70154fbc1905de
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. 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 lure related to a 'summary'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a phishing or malware distribution 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/123?utm_term=kiffe+kiffe+demain+english+summary PDF link annotation
    • http://rajenajodaf.iblogger.org/finifokukinesitukuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494166/normal_6022086a960d6.pdfIn PDF document text
    • http://vemusopudin.22web.org/saint_benedict_prayer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454049/normal_5fe90f4adbfd3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465018/normal_5fe5555f9cda3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481841/normal_5fdac3bf61bba.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/ZjhB6hg/rusekogebej.pdfIn PDF document text
    • https://cdn.sqhk.co/savaketiju/hcygiia/push_box_puzzle_game.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/xidazeze/52004131633.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/cds_online_form_fill_up.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/watupoxenivof.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/raees_dialogue_ammi_jaan.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/awesomely_simple_john_spence.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/business_expense_tracker_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/luratigobojux.pdfIn PDF document text
    • http://zokitidekav.epizy.com/end_stage_renal_disease_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/ulcera_aftosa_recurrente.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/30337953369.pdfIn PDF document text
    • http://fusopub.rf.gd/288114422.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_off0000edfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFE 5456 bytes
SHA-256: 57197500fd15f402a9d890201badbc33f52e98a43e990033093708cbfa094bda
font_01_sfnt_off0001006a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006A 10600 bytes
SHA-256: 40c4fb6e11b7bde8352b5a16a6dc4a773f9a321cf82f1bf0ccf9e53d66d21449

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