Malicious PDF — malware analysis report

Static analysis result for SHA-256 9170e44ae5c55579…

MALICIOUS

PDF

74.3 KB Created: 2020-11-17 15:25:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: eeb989866dae864fccc728169db8341e SHA-1: 525cc99a500b975fc34552d8208daa373d7275ac SHA-256: 9170e44ae5c555792c77cc88f1528b7d70ce46a87c9448b5b90a3704a32e10ee
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The file likely serves as a lure to direct users to malicious sites, potentially for phishing or other scams, as suggested by the redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/wb?keyword=brutes.%20io%20%20pc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4451574/normal_5fa2f60d9e062.pdfIn PDF document text
    • https://vurazomuloja.weebly.com/uploads/1/3/4/3/134322302/2f728b15d6c1b9.pdfIn PDF document text
    • https://tamagokevalagir.weebly.com/uploads/1/3/0/7/130776783/vikowo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379968/normal_5f8f4269bcbe0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0000810b-5917-4161-86c0-3f0a4c54fb94/kuvojedadexexajibil.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/risk_assessment_worksheet_for_construction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/590ac163-379c-4f11-a49e-2d90faa9921c/sexoparelaf.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/28864743531.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/ziwazukarikuv.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/gmail.com_accounts_login_mail.com.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/office_ergonomics_tips.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/293c05b7-a1df-4bba-bf73-a2ec891afde3/kepepapulepidet.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/capitulo_4a_asking_questions_continued_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba92f053-f4ee-4518-8bfe-834f3bdc328d/xekugalipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/defb12ac-a72a-4549-8f24-34dbb4b01daf/formula_de_karvonen_frecuencia_cardi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/329ebdf0-efe9-42df-b664-8990fb0b93da/6192147286.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/carrier_infinity_thermostat_troubleshooting_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5985d5f2-bf70-49e0-9572-1a1781cb1873/35374013935.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_off0000e886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE886 4764 bytes
SHA-256: 1cda23053b827fec84ed390a264e7ab74d7ea6493cfecf0bd8e6dc23a612e3b1
font_01_sfnt_off0000f8d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D8 10392 bytes
SHA-256: 657aec1fb1285c869f0dd17f052861f6bd1c9429545f54654e9732d4d9ac6bbc

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