Malicious PDF — malware analysis report

Static analysis result for SHA-256 14a1ca12b7280fad…

MALICIOUS

PDF

57.2 KB Created: 2021-06-21 02:37:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b99275a7524723c743ad8db656e039bf SHA-1: 310b563624fa7a0604373f7fae3bd478c42aa570 SHA-256: 14a1ca12b7280fad94b035b8a5207bb070015ef559b03424a7800c694bc2b3b2
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 WordPress upload directories, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is a phishing or trojan delivery mechanism. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8253

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://infrive.ru/uplcv?utm_term=sadlier+vocabulary+workshop+level+e+unit+10+answers PDF link annotation
    • http://zaun-produzent.de/userfiles/file/vemob.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/69fa920a2d0a57cf2c56fa32b12801d5/15827753012.pdfIn PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/seputuno.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/d219f47e459fefaf3783504075c8f41b/68883827499.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160819f3fb5719---28325268980.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/5koulqvgcm1658o92lkdb4au94/87138027765.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/mofogekerugigunapu.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/86595237489.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a1519a9d2---lenes.pdfIn PDF document text
    • http://chukgoobok.com/files/fckeditor/file/11421662305.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/fa6e8540686ab5ee8246b6e48a15d15a/56525303044.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/0389a2908995f5c22f54ebe31f6e006f/ledufipebe.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/feb5f3226f574d038d81bd795144ed1a/tejozaxivurogimedipalomo.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c937d6add1---57720977225.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/d4421de61a3a6bc57c5318b5f07cc022/gobipajebi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC855 5916 bytes
SHA-256: 76db2aa99218d85158ee6409b1def4fa38f25312b563b156558773ed8c67a146

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