Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8a01eb695b8e132…

MALICIOUS

PDF

72.2 KB Created: 2021-02-20 18:25:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f780cc5a07124fe12b5f0de2ec011d15 SHA-1: 767936e32d987dd857ef235d3667a26eb70f3a48 SHA-256: c8a01eb695b8e13290a164d281d7597dc11f2b7c37bf382e8316ec886a0d35f0
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/strik?utm_term=dyson+dc59+battery+change', suggesting a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate an attempt to direct the user to malicious infrastructure.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/strik?utm_term=dyson+dc59+battery+change In PDF document text
    • http://difodalutovirub.iblogger.org/dinekatofawovedomoletol.pdfIn PDF document text
    • http://cosmostil.top/emulator_android_untuk_pc_yg_paling_ringanwyh0h.pdfIn PDF document text
    • http://arendaavto.taxi/zogozin2dpp.pdfIn PDF document text
    • http://rimka.xyz/drugs_society_and_human_behavior_17th_edition_quizlet_chapter_1wkq1w.pdfIn PDF document text
    • http://tikovg.xyz/arithmetic_logic_unit53r1m.pdfIn PDF document text
    • http://offthepdrs.com/rojisakapidugitegopikanm0wf.pdfIn PDF document text
    • http://totalcreditcheck.info/balancing_chemical_equations_worksheet_b_answersc2vgz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://potivupu.epizy.com/kobatuwulomuvudazavux.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/ehsas_program_by_imran_khan_form.pdfIn PDF document text
    • http://jatomije.rf.gd/cisco_webex_meetings_free.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/84626183337.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/tunexokoluf.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/48745715879.pdfIn PDF document text
    • http://moxowofabijis.epizy.com/36663959251.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/air_force_commendation_medal_template.pdfIn PDF document text
    • http://melumudinev.epizy.com/xokemejovidoxuvubad.pdfIn PDF document text
    • http://rakukofikojoku.epizy.com/quran_online_bangla_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/ny_giants_injury_report_week_16.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_off0000dad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD5 5688 bytes
SHA-256: eae1c7f92a87f3c047d8040eae54d08fa57c2544314f7ebe515467b7a7f5ba26
font_01_sfnt_off0000ee34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE34 10584 bytes
SHA-256: 5ef85414d1a43b80ed8c854eb80adaf9657ab67c6e0eb1f09751a6942af7044f

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