Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2363a063cdbfd4e…

MALICIOUS

PDF

92.5 KB Created: 2021-07-25 09:40:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1acd594dc526040265670dd76593a2e7 SHA-1: ec3c28edeb194fe3c8ae9e8cb5357cc61400c8d5 SHA-256: d2363a063cdbfd4ed211c3322a802565ffd1f1a933661fe2eae52506639e9b4c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites hosting other PDF files, indicating a link farm designed to redirect users to malicious content. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 6

  • 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 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://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd2e404862---dirilekosezos.pdf In PDF document text
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/fabajawakurugetesix.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a0df13c7c48---95467847296.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607718a7e7df7---12867442227.pdfIn PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/25385637659.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/goluvemomuji.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bc949baa7eb---48569174148.pdfIn PDF document text
    • http://kedehg.com/ckfinder/userfiles/files/weburuj.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606e76859863e---vunegugexokaxowejojejit.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b022e368a3f---dukitexumupozarexuguwifo.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16081600272f77---suwukademanunonakuwarodor.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/wawositakidebidixuvumifox.pdfIn PDF document text
    • http://helpibr.org/clients/f/fe/feaff840d005acecac0f151e8679c8db/File/pulopozawojubapa.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160f810581d506---bomejivowupuxixatuk.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/90262238080.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072323c149e1---birezeseriwuvanoduvu.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/88291603702.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/davupawapoguma.pdfIn PDF document text
    • http://sbkf.org/files/files/benadutowa.pdfIn PDF document text
    • http://kartinatv.org/uploads/files/gevonaponegizav.pdfIn PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/gexafemijapivodiso.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/64288c3727c7fffea6ff87029616755f/kuvebotepusirebuvadumiz.pdfIn PDF document text
    • http://www.tiendadelbordado.com/ckfinder/userfiles/files/xisusopuzibe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=vt+radio+decoder+peugeot+downloadPDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/jumovirojamexepanotuva.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://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_off000106db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EED 17308 bytes
SHA-256: c18f737c29735e999cc29b261647a69b9c072cb747905c2d25095f04a8fcb4e9
font_02_sfnt_off00014b24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B24 10676 bytes
SHA-256: f4f1df75b774e22b495382b903785803d97b01985265eb228b52309afcf1265a

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