Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec2a68b566994ed…

MALICIOUS

PDF

68.3 KB Created: 2021-09-14 23:44:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 53ab8566aa412f30040443efc4b48ec5 SHA-1: 6e52edf13c435305ed5698ab0f3cd6f92c7e711f SHA-256: 0ec2a68b566994ed6c591f7dbf8514eb7e1dfaf03efb397ea8750ac51c49f246
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to potentially compromised websites or disposable hosting, suggesting a phishing or malware distribution attempt. The presence of a raw IP address in one of the URIs and the ML classifier's high confidence score further support this assessment. Although no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious intent to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://alvitraders.com/files/bajivax.pdf In PDF document text
    • http://combatkuntao.com/ckeditor/ckfinder/userfiles/files/25134551083.pdfIn PDF document text
    • http://mictrogiang.com/userfiles/files/3858290352.pdfIn PDF document text
    • http://mrspk.com/ckfinder/userfiles/files/37772918017.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613e12eeb2738---28107369003.pdfIn PDF document text
    • http://volkshilfe-vlbg.at/images/content/files/63118165066.pdfIn PDF document text
    • http://www.fdconsult.qa/public/uploads/cms_files/38943708300.pdfIn PDF document text
    • http://haiannweb.com/uploads/files/49953161752.pdfIn PDF document text
    • http://abbuffalowings.com/uploads/files/zepilokul.pdfIn PDF document text
    • http://smenergy.kr/uploaded/file/1240499625613e33b36a881.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/bedipovuvetegupiraxexuz.pdfIn PDF document text
    • https://profm.hu/files/file/61001858953.pdfIn PDF document text
    • http://montpellier-businessplan.eu/mbp/upload/images/images/upload/ckfinder/vugukobazilurinelatopodo.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c36a3c5876---winolefu.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16132e42588a01---garadaxobekapitoligaso.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec5017f2c2---vafebuv.pdfIn PDF document text
    • https://arabadvertise.com/userfiles/files/84921089082.pdfIn PDF document text
    • http://tech-in.info/bramy/userfiles/file/67615291490.pdfIn PDF document text
    • http://140.121.125.49/ckfinder/userfiles/files/20210901_151725.pdfPDF link annotation
    • https://dunakanyarfesto.hu/ckfinder/userfiles/files/92901808423.pdfIn PDF document text
    • https://innovaciones-plasticas.com/imagenes_cont/sitio/documentos/zagunuwememitozozive.pdfIn PDF document text
    • http://vipforiraq.com/userfiles/files/buret.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=download+rom+android+10PDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB094 14336 bytes
SHA-256: 7c46543df5fb5d445d72aabcaf59e75275351f2de86630e8b5782d5203c03e67
font_01_sfnt_off0000d48b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD48B 10272 bytes
SHA-256: cd190e6ebbbf4affec316016834fd2f245ef8fbc774db89338efa630f7277006
font_02_sfnt_off0000eb9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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