Malicious PDF — malware analysis report

Static analysis result for SHA-256 126b47ada4d6f6b7…

MALICIOUS

PDF

77.1 KB Created: 2021-09-14 07:24:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: bc7084886e295480716b2a32dc0c1e33 SHA-1: a4620f67e6db431e70b90d88fe47d7357ae2ebe9 SHA-256: 126b47ada4d6f6b7064ac0e8ae2543516afbeff28191d4afd6fc0a211f0b9aac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or are part of a link farm designed to obscure the final destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery through these links. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the idea that this document is part of a campaign to drive traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://domki-kopalino.pl/pliki/zagepudojos.pdf In PDF document text
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/fidunupaxilopanugurup.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/sagutemepipuzirudo.pdfIn PDF document text
    • https://jagamimpi.info/contents/files/11456633547.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/161320c3146dd9---gegev.pdfIn PDF document text
    • https://elsadaulte.com/ckfinder/userfiles/files/44394555018.pdfIn PDF document text
    • https://kultmotor.hu/images/files/78674021421.pdfIn PDF document text
    • https://uppersanduskyrotary.com/cms/files/File/xafawuzusexipofi.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/fepubamobewunavet.pdfIn PDF document text
    • https://actorconseil.com/files/file/99119810381.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/81012327663.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/3148a402d5b02011ecb7d868df8911ee/fubuguturosip.pdfIn PDF document text
    • http://dichvuhieuchuan.com/upload/files/1124056205.pdfIn PDF document text
    • http://coffee33.ru/archive/file/87296548037.pdfIn PDF document text
    • http://vinaktv.com/storage/ckfinder/files/muzufakulutaruxiduzuvaw.pdfIn PDF document text
    • https://mchs.kz/userfiles/File/wafoxaleronoxaz.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3j8p44llh2vpsj2slatcbkj286/22656305841.pdfIn PDF document text
    • https://jhservice.net/imagenes/galeria/files/68423346182.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/76574822702.pdfIn PDF document text
    • https://atlaskvartir.ua/data/uploads/files/72985885720.pdfIn PDF document text
    • http://emke.hu/uploads/ckfinder/userfiles/files/mamamivojugazifokamefevu.pdfIn PDF document text
    • http://oiseau-bleu-morzine.com/userfiles/file/17245013502.pdfIn PDF document text
    • http://quesnelbusinessnetwork.ca/userfiles/file/ligomikazuzivo.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/5d9c462f1707e5037856c0e877bae368/xazoja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=the+name+of+the+wind+pdf+free+downloadPDF 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_off0000c94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC94C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE163 10644 bytes
SHA-256: 28cd4ffea4822a9a6af5a92588d62c9b35c324d1448fc36e8977d15d1762244c
font_02_sfnt_off0000f985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF985 17644 bytes
SHA-256: 40926e3c3d7cf1dde4620bff498eb2fd7711855ef250fb458c8a2feb29cab915

Open this report in the interactive analyzer, or submit your own file for analysis.