Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a22cbd575a39477…

MALICIOUS

PDF

66.5 KB Created: 2021-06-24 17:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d66ef31c67366ccf706544941d8f74ae SHA-1: 7df7913580a849fa65232a7dc6878fc62751316b SHA-256: 1a22cbd575a39477203fe3324ed981bf0f5d71d98210169c49fb063a37dc0a04
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm hosted on compromised WordPress sites and disposable hosting, suggesting it's designed to redirect users to malicious content. The embedded URLs, such as http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c87f05b78---81705573543.pdf, are key indicators of this redirection behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8377

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://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/5e167c71e2661feb692bd81056b1361e/70934877079.pdf In PDF document text
    • http://inwallendorf.de/userfiles/file/49342750410.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/18714943024.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/rivusurakejaw.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608358267a0d3---bebezusunu.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c87f05b78---81705573543.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/6bf8af3c0015b6b6b4579d94c06dc427/62279223071.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/supuvudamesofezel.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/7513b0372148f3f9d2b2d3c849554b8c/40827408937.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/2a3dfbdb6c87137498342c0570fff16e/61634597186.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/097494dd3d0036cb74321532aac0260c/92256316893.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/qhmoits48r530tqdv2nsp5oeb2/sibamurin.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/25924711068.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba7f9e5cd9---manuvititivipodofube.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609584117ac5f---79482605827.pdfIn PDF document text
    • https://encoregallery.us/wp-content/plugins/super-forms/uploads/php/files/b95c253b7e4442a98911c348627c38b1/75033165984.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=powerpoint+save+pdfPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC51 5156 bytes
SHA-256: 94408c759cf45dd40460bceb84e0f439f1aaa8480926ff0b5440fb131dbca7f0

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