Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbb02f0a408c83ea…

MALICIOUS

PDF

87.2 KB Created: 2021-06-26 14:38:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c897192471545c1f6ed54cebbb3e6267 SHA-1: 5fef81f822ff20402aa7a311bbfbb8b17bccc248 SHA-256: bbb02f0a408c83ea3854227a8fae0a5373c9330288747df0762ec53eb824d0f6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://wastran.ru/uplcv?utm_term=the+age+of+adaline+full+movie+free+watch PDF link annotation
    • http://www.cddfct.com/up_files/file/wilisazavaribedisop.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096c749161d4---bokidaritibaguxaponepa.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608702f6db5cd---33542276874.pdfIn PDF document text
    • http://escqatar.com/uploads/userfiles/file/file/sumevotagesa.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/560884c798471c7038e198b5891545e2/lutugazudotujo.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609656261591e---jekotu.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160878c1e9b113---73220278541.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/51557997777.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e35da19d36ca7664d213d060e9a0681e/jadakid.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/98838994829.pdfIn PDF document text
    • https://nepalimodelagency.com/userfiles/file/99379173950.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/df04d228e24415f40e0caaa98ea7c4fb/82734406327.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/wesivuwof.pdfIn PDF document text
    • http://longvu.vn/Images_upload/files/97214721329.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/2c04a0dffc22312b35128e23755c79a2/vunomasovato.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1609757d3e5be2---97288595286.pdfIn PDF document text
    • http://zjxfjc.com/uploadfiles/files/fewumufekegu.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/87835224620.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/jafokegovabesurekoneje.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16085d0965d48e---75792924773.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/c4006e93376380cdfdd13c3722a516fb/61121545183.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/e9e28912d7770265067f5bd8c8c901a3/29658456653.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/galawikeguvafuzegimuve.pdfIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/5b96f963ab861ac26fcebb42bf8e02e6/54808162630.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_off0000f13e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13E 17300 bytes
SHA-256: c3af9e2d1140119cf03b034aeb0acd36a5fa572108c822ef57189fa0c814049c
font_01_sfnt_off00011e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E10 10972 bytes
SHA-256: f0806cd9d80deaac3aba477acd3acf442db9bff8d2234ebf18928d68dda70ec3
font_02_sfnt_off00013726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13726 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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