Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fad15f86421fd43…

MALICIOUS

PDF

91.7 KB Created: 2021-03-18 05:29:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e6abfbc7e83c5abfbcf652c33091d67a SHA-1: 6d90d7aa950d5887ce2af5f30e9e49a97866feac SHA-256: 0fad15f86421fd43e3a3b211e3d9b65d4e68df464c8a0590fb010ed582a7c3ff
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF link farm', suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically flagging it as a phishing trojan. While no scripts were directly extracted, the PDF structure and numerous external URLs point towards a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/strik?utm_term=how+many+books+are+going+to+be+in+the+trials+of+apollo PDF link annotation
    • http://rowowesofazov.medianewsonline.com/tepura.pdfIn PDF document text
    • http://nitapida.mywebcommunity.org/2006_mercedes_e320_cdi_service_d.pdfIn PDF document text
    • https://depopuxa.weebly.com/uploads/1/3/4/8/134893869/bd64baf5.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/jutodiwararijusobu.pdfIn PDF document text
    • https://vakenufepuxino.weebly.com/uploads/1/3/4/5/134529081/jumebi-bejawunugafidi-kizadosudu-turorifawibo.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/sazewurinisek.pdfIn PDF document text
    • https://jifibixivedud.weebly.com/uploads/1/3/6/0/136082986/jibif_fagukubizuserub_poxapapobaz_rakereje.pdfIn PDF document text
    • http://betizekaxu.getenjoyment.net/vurerepe.pdfIn PDF document text
    • https://kelulove.weebly.com/uploads/1/3/0/7/130775366/fijuluxezubolepib.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/suxugipipolazog/how_to_set_time_on_nortel_t7316e_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/logezoliv.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/welevemusosemadumonaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c27d0680-d790-4942-b7c4-b73a7c5fbb81/g-shock_watches_gmw_b5000_metal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33d298b1-6561-49d7-851b-d4fcb390dc2b/9821938379.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/vinebediva.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/free_letter_writing_worksheets_for_preschool.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/cloud_computing_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbfe0d8c-c569-4e4c-9587-3fdc23bcc52e/focusrite_6i6_price_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c56817fc-4470-463b-8e7f-27fb187b7cab/xuwutapudi.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/helicon_voicelive_play_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db3caadd-bff3-4491-bcb1-57dca1cd5341/how_did_europe_rebuild_after_ww2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e2a7b6a-aade-4499-a254-d4a6a653d765/30570633907.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/the_door_in_the_wall_marguerite_de_angeli_audio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38fcddee-aa9c-43d5-92f5-0a758b767ad7/18335859869.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_off000125ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125BA 5672 bytes
SHA-256: ac08cafc1f38b145c23c24a4f8d4c6fcd9e757ae6a4ee3c9d5fd01d720d46a86
font_01_sfnt_off000138f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138F8 11068 bytes
SHA-256: 88a96d533de7c3ccd9941edece657974939470273c606ab3a455732992955d8c

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