Malicious PDF — malware analysis report

Static analysis result for SHA-256 3823eab0344dd41d…

MALICIOUS

PDF

108.1 KB Created: 2021-03-30 09:18:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 962ac7cbebdb05a60497784d762c7140 SHA-1: 15427a718e1d88d43b107e7926c0f857c2422141 SHA-256: 3823eab0344dd41dd99c40b77e3d8e3f9cc5e6eb378a792312998c7f4eb51e43
96 Risk Score

Malware Insights

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

The file is identified as malicious by a ClamAV detection and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'jacksth.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into visiting a compromised site.

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
  • 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://jacksth.ru/award?keyword=map+projections+cartographic+information+systems+pdf PDF link annotation
    • http://vabuletarikinil.iblogger.org/business_ideas_in_kerala_malayalam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388613/normal_6000c5907e04d.pdfIn PDF document text
    • http://vigirorimikana.medianewsonline.com/the_meat_buyer_s_guide_free.pdfIn PDF document text
    • http://viewcreditscore.info/70782582193yovp.pdfIn PDF document text
    • https://bowetupivivuz.weebly.com/uploads/1/3/1/4/131437724/5210491.pdfIn PDF document text
    • http://zawugudumi.getenjoyment.net/software_development_services_definition.pdfIn PDF document text
    • http://olymptrade.buzz/telugu_antakshari_songs_listzfk6b.pdfIn PDF document text
    • https://sikiwakasizo.weebly.com/uploads/1/3/5/3/135318116/3630625.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491148/normal_602045012868a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449974/normal_602439be55592.pdfIn PDF document text
    • http://luwogexejel.getenjoyment.net/67974125806.pdfIn PDF document text
    • http://classkaod.ru/60745183205gfuf7.pdfIn PDF document text
    • http://activa-fb.com/air_brake_system_report9fx97.pdfIn PDF document text
    • http://demegudatodura.iblogger.org/sports_anthropometry.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/muwomapotumugi/buy_adobe_acrobat_pro_dc_online.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/82213704232.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/rajamifawesezituselamez.pdfIn PDF document text
    • http://vodugesivizere.epizy.com/22528277699.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/tomozi.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/juxonemup.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_off0001670d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1670D 5720 bytes
SHA-256: a7e1d6652a59303cb2e6aef206963b730e9bc343f2f538b5ef60eff460ad1007
font_01_sfnt_off00017a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A76 12008 bytes
SHA-256: ecb619e0adabd50c6555f360148005893c279dac7873b7a958c5ca2797d17fb4

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