Malicious PDF — malware analysis report

Static analysis result for SHA-256 40b57d7516a85c2a…

MALICIOUS

PDF

78.3 KB Created: 2021-01-27 15:52:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7b2e7be648679c1fe83b65fee6a25679 SHA-1: 2427e91160591556c9e4e03ade22324d7d89e830 SHA-256: 40b57d7516a85c2acd36fe8356ee28191cd1636f3865e30b0273efc4488fecca
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL 'https://baarspo.ru/123?utm_term=aetna+breast+pump+in+network' suggests a phishing or scam attempt, likely related to health insurance or medical equipment. Although no scripts were explicitly extracted, the PDF structure and the presence of external URLs point towards a phishing attack vector.

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=aetna+breast+pump+in+network PDF link annotation
    • http://lovemecompletely.com/offroad_jeep_driving_simulatorxhep7.pdfIn PDF document text
    • http://avtovishki-msk.ru/roller_coaster_arcade_ride_meaning3p5uz.pdfIn PDF document text
    • http://13millions-warzone.store/kia_picanto_service_manualvc5gq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414169/normal_6002f02d15dd2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373259/normal_6002bd7229c46.pdfIn PDF document text
    • https://sasanufodokedu.weebly.com/uploads/1/3/0/9/130969760/4176338.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420438/normal_5fe7f5d1c0553.pdfIn PDF document text
    • https://toraboretopupu.weebly.com/uploads/1/3/4/7/134769369/1a8be3ce4af3a93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388169/normal_600a98c7e08ba.pdfIn PDF document text
    • http://fakaripeti.xyz/naming_3d_shapes_worksheetsz10w3.pdfIn PDF document text
    • https://fadirepux.weebly.com/uploads/1/3/1/4/131438814/1366473.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473052/normal_5fd320be49498.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/bhipib8/xovukabonime.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/Igdeidr/blue_apron_thanksgiving.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393901/normal_5ff46c995b6b5.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/nuruvapozixix/platform_heel_shoes_for_ladies.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/the_technology_of_anodizing_aluminum.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/cyanogenmod_9_zip.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/joxuxupetijuverarufok.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/coloring_sheets_letter_b.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_off0000f57a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57A 5220 bytes
SHA-256: cf056e3a8657d8c2348129c057db2e6b38d1a8641be61dc0ea7d0e9b21ed35e9
font_01_sfnt_off00010733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10733 10816 bytes
SHA-256: 47233be1e243d7033346d440cbf23f5e6f82a0d5b2744764457593dd227735ec

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