Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb11a71293ee6c21…

MALICIOUS

PDF

64.0 KB Created: 2021-07-19 06:20:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 542ee2153468c2458970088d55213e94 SHA-1: d1aee413a42790697a35680eba9f6a3ab6e7c839 SHA-256: fb11a71293ee6c213532513633d687ca10d96a2279dcf1341c29c2d78d3a7819
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a link farm pointing to numerous disposable domains and compromised CMS upload storage, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and heuristic firings are indicative of malicious content designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8558

Heuristics 5

  • 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
  • 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://canadanur.com/resimler/files/65336952629.pdf In PDF document text
    • http://solmoda.it/userfiles/files/61290731914.pdfIn PDF document text
    • http://lovesushiscv.com/uploads/files/wopevumaburafivojewut.pdfIn PDF document text
    • http://simonide.org/userfiles/file/33268122504.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/m0i5d162vetlgbc20ll864scq8/bibikowozofitofixokupob.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606e7be16dd8a---61043982628.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/5461817658.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/rgm6ni1e60012vkegv8dddhv6n/33054917792.pdfIn PDF document text
    • http://fly.no1-yes.com/userfiles/file/97146193197.pdfIn PDF document text
    • http://barcelonahotel.vn/UpLoadFile/file/kotagopuvomumewaxisuka.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/s45iprb4gojjo6rl9gn9cti5v2/wujobazironupigu.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ade123acb6c---52162705906.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3cbc024d9d---63989374276.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/8c6d3f0f8bb248ba11e41605d5464af5/24954900793.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/gps5rqnvchq60gfj9jo7e71rkj/besojimi.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c149a28ed89---dazupijuf.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607e45d9074e6---16475278073.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/tagasuvod.pdfIn PDF document text
    • http://npi-management.com/ressource/site-image/files/tawezik.pdfIn PDF document text
    • https://vigiweb.cl/dinamicos/files/file/wamukebidopijuxajot.pdfIn PDF document text
    • http://meijialx.com/ckfinder/userfiles/files/pojibafobuxe.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/99595966975.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/08gccdckqi4nhtuaj57e4p5g44/nevovezekaloxijixuwolog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=html+coming+soon+template+freePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E7 10812 bytes
SHA-256: f2513427cc010294dccaa1b67fdc847decee17fdce5e3f0a8d84fb910750429c
font_01_sfnt_off0000e9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1