Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e8a86e78b344b95…

MALICIOUS

PDF

90.1 KB Created: 2021-04-04 10:55:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 02a5aed5506706525b69305d6e5e94ab SHA-1: eb786ed6725a02f1dab8356c29aa1c726161e355 SHA-256: 1e8a86e78b344b95166d859d1c1a6f8bcac80d15f3e35d349fe8e7da7cc62007
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains embedded URLs, one of which is presented as a link for 'basic computer hardware troubleshooting pdf', likely a lure to download a malicious payload. The PDF structure also shows signs of manipulation with duplicate object bodies.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 http://vetozadep.mywebcommunity.org/international_public_financial_management.pdf In PDF document text
    • http://pexulisinipev.sportsontheweb.net/gross_anatomy_of_upper_and_lower_limbs.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/g_shock_wr20bar_review.pdfIn PDF document text
    • http://gizapiretade.iblogger.org/39525166356.pdfIn PDF document text
    • http://semarogejej.iblogger.org/accounting_research_topics_for_undergraduates.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/_7yJ53orglQ/wb?keyword=basic%20computer%20hardware%20troubleshooting%20pdfPDF link annotation
    • https://uploads.strikinglycdn.com/files/b2d428c7-cad1-4e20-9ef7-2a227605135a/72771164482.pdfIn PDF document text
    • http://fezifax.rf.gd/craftsman_3_8_torque_wrench_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1839a408-5b49-4806-b69e-a20a3e890da6/circle_worksheets_4th_grade_fractions.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/synonym_for_additional_information.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/woods_outdoor_timer_instructions_50015.pdfIn PDF document text
    • http://sudezubedafa.epizy.com/95138085835.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/blood_pressure_cuff_manual_pump.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/vafupavisizonudetozuneku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56c92b1c-35f3-41c2-af08-cdd16f70ca49/31349454288.pdfIn PDF document text
    • http://zimemotom.rf.gd/lavewotabur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42ad807b-cab3-425a-9ace-f0ab8c59d172/cuento_emma_zunz_resumen.pdfIn PDF document text
    • http://selamamoli.epizy.com/miwawig.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/duzivejitodesutemono.pdfIn PDF document text
    • http://demaketimazo.rf.gd/ronofanozopejenuvalemid.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/tikale.pdfIn PDF document text
    • http://vivimaga.epizy.com/checks_and_balances_worksheet_5th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/78515243353.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_off000121de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121DE 5848 bytes
SHA-256: c0ac1e41cfc67d6583e20ac80a72f2f90423a561b9d6e84981acb20ffa0f010d
font_01_sfnt_off000135ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135AB 10800 bytes
SHA-256: 402668d0d06f8b5364aef2028f2e7d3dbac034e77412283d1abe025a4fdd57a3

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