Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a6811ab1dcf62da…

MALICIOUS

PDF

86.3 KB Created: 2021-07-22 02:43:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 7b4bd5d8a1bbb48e8de63ef1bdce9157 SHA-1: 4c59cacf66976d0ef154bd9043a973ba1a34adbe SHA-256: 8a6811ab1dcf62da91c3e50d63cd536e04553ab57a0e8be4c862c66d11957b7e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to disposable hosting or compromised CMS upload directories, indicating a link farm designed to obscure the ultimate destination. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and link farm behavior are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://attlas.center/userfiles/file/ruvonip.pdf In PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/dosunizewezomi.pdfIn PDF document text
    • http://ballard1966.com/clients/22636/File/jejin.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/37973592009.pdfIn PDF document text
    • https://arket.io/wp-content/plugins/super-forms/uploads/php/files/n0vq80j0qfhnq2la8dao5fbpmg/ronafuwonopevudemomekoto.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16072f1b6c1ac7---midag.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/fe2lsqrjvdksb9disr7jqt4avi/zagipi.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16090bdebefdef---46576356104.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/e3afb97f1b87f6436a351a591cfc7b32/futegobomokijovesaxepi.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/529673454253cb145bec8d56445c8a32/37862582635.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096c91d15b34---39197263829.pdfIn PDF document text
    • http://abwingssuffolk1.com/uploads/files/zowezivuzovuravujitusom.pdfIn PDF document text
    • http://wilkinsconnection.com/clients/9/94/94ba1e7d864c5c8af3bb481f5f9f31de/File/98891392701.pdfIn PDF document text
    • http://barrospizzadb.com/uploads/files/9384823834.pdfIn PDF document text
    • https://hirurgija.me//files/67890306478.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/d356f5666842c9c2d73beae4e7a106a0/gonaxosudewivag.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6ce8def79---nibizuredudezaveviwefobu.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c5d0a3fb4---voritekivowofikugeko.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16079ce97a810d---83997871235.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/fc0a0af1b91e12a2bb2effaf8deeb114/bukifalorigibamunojemoka.pdfIn PDF document text
    • http://bigsvatcharasith.com/userfiles/file/1225830459.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ee4b12a49f1---munujazatomanotumixefu.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/55720371239.pdfIn PDF document text
    • http://faxik.ru/ckfinder/userfiles/files/gakasuwasojunuporokufe.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/9fbc40a1bb73a9746d5cebb7767c8e02/80886582636.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d43b219bf3---69698383470.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=umbilical+hernia+for+womenPDF 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_off0000f097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF097 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AE 10568 bytes
SHA-256: be776cf55282ec6ebb5d38589c458b97d5ca7b008f177edccc29304bfde350a9
font_02_sfnt_off00012097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12097 16212 bytes
SHA-256: fd23abe97e71e5d4d22e7ad70105e3683cae6a4c416103c75c5768ec0b3de80e

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