Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b6cf1c32a566cef…

MALICIOUS

PDF

73.4 KB Created: 2021-06-26 22:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 50c231b470d3bde26c88797ab86e44dd SHA-1: b8fbbc538efa144ba5c86a842ed6176e288d9231 SHA-256: 2b6cf1c32a566cef85ef6122ea5fe9a84c243e76e2c4cf097aef977f21f3b9a8
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised CMS upload directories, suggesting it's designed to lead users to malicious content or phishing sites. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the link farm nature of the document is a strong indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7043

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 https://garglob.ru/uplcv?utm_term=let%27s+have+another+cup+of+coffee+let%27s+have+another+piece+of+pie PDF link annotation
    • http://www.celso.org/download/limapedenuxe.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/30a9b4190a2366fd31abfee1c4bcfe9c/fobul.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/9b518b84d5dd57d8e5d0c0c4056b6199/dibazifakuzer.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/f44df6387e3a40de8a69bf435336a531/1273815623.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/15ae33061f09850944dfe393e938bd89/96848959954.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8dfea3033---75631783686.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/dasoze.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087158de5061---tujarefebamowi.pdfIn PDF document text
    • https://noddy.nu/images/file/sabadesoxo.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a840cb1ca96---pokawizavuvurukezib.pdfIn PDF document text
    • http://yngc.ru/admin/ckfinder/userfiles/files/7345596169.pdfIn PDF document text
    • http://frangarcia.eu/upload/file/nixila.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160722aba90bca---19374002656.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a32c10fe59---99350641895.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/18e4aa32ecc68f79d73d108ff5d567af/jamasaxig.pdfIn PDF document text
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/14619519152.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/1aqepm01r244kulhmla1l20g04/tezunux.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/l0lb2sk1keg3ik1bfve6qp417u/5044537906.pdfIn PDF document text
    • http://automozg.by/upload/editor/files/63275329461.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/sol1nool2f75ao89gfvt486009/vepesoteteni.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e4c76a65e---pefofagexajipusojag.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/b01793819219ada845f0d98e6ee7e194/nubewawu.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160700d9dcfef5---zijazepuvuzug.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607088dd913fb---38468913470.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD18 18508 bytes
SHA-256: 05c372f2a99f01f8f8e3d49b34f5f3a9b8091c465604febb0172569cbc90ed89