Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5a631ba6bc78f81…

MALICIOUS

PDF

73.4 KB Created: 2021-02-13 05:54:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: cea3a9cf4427c301ce84ec1ba3ba62e4 SHA-1: b207ca688a91ddc3ec2a7d630d7d5404b5e57783 SHA-256: b5a631ba6bc78f813b011b40b34d2c2223db7a7f22da248f225e50c05d8b8462
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://jottigo.ru/123?utm_term=1080p+120hz+monitor PDF link annotation
    • http://wirelessinfo.ru/zamolodozijupazasebov4fvk2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384649/normal_5fe5b57a006e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427519/normal_5fcb17edd8576.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480728/normal_5ffebec996fbc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://roxeruteruda.epizy.com/awanish_singh_mobile_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/lezulotenazuxipimetipiz.pdfIn PDF document text
    • http://xazopab.epizy.com/abbayi_class_ammayi_mass_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/bareminerals_luxe_performance_foundation_brush.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/appcenter_android_emulator.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/worif.pdfIn PDF document text
    • http://jusexezoti.epizy.com/zesupubixotububozom.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/igcse_grade_1_science_worksheets.pdfIn PDF document text
    • http://raziwisubuza.rf.gd/xovetizoxozudaf.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/autopsy_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/zutituxawi.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/vawuronora.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/bluestacks_for_1gb_ram_windows_7.pdfIn PDF document text
    • http://buzanone.epizy.com/solving_quadratic_equations_by_graphing_practice_worksheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D8 4784 bytes
SHA-256: 38d220d80313c15301730838f16c93b3086621bfdd2819be1c146af51fc6f9e6
font_01_sfnt_off0000e4e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E2 11132 bytes
SHA-256: 0b081a8e5e447d1fa71b32921bef03270a861f9b5f280554821707e1fd8fb157
font_02_sfnt_off00010ac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC2 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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