Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bfa64412a5ea95d…

MALICIOUS

PDF

59.5 KB Created: 2021-09-27 22:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 5a7d15f7ed9984d7ca5aa242a6e9c7d9 SHA-1: fbe5cb0ee50f8ff0d33c03ede16c2ec24ff79db8 SHA-256: 6bfa64412a5ea95d816351d9d65c772886ece5c473cd6bb33008e040ad9f356c
154 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm pointing to compromised WordPress uploads and disposable hosting. The embedded URLs suggest a phishing or malware distribution scheme, likely leveraging a spearphishing attachment vector. No scripts were extracted, limiting the ability to detail specific execution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6644

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://qdjshg.com/files/file/64280889898.pdf In PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/adfceca00b3425e17abd4124982c18a5/17636651412.pdfIn PDF document text
    • https://berbagiangka.com/contents/files/9253852441.pdfIn PDF document text
    • http://muaah.ca/userfiles/files/13582339596.pdfIn PDF document text
    • http://swhwsolution.it/ckeditor-ckfinder-integration/uploads/files/mogakemup.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/30630138468.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1614cebb933df6---29679479873.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac402b11d3---92768630729.pdfIn PDF document text
    • http://tai-group.com/upload/files/gepeba.pdfIn PDF document text
    • https://jyapa.com/jhuoyue/uploadfiles/84285341738.pdfIn PDF document text
    • https://taptigrihnirman.com/singhania/downloads/file/mofuporolegepiwog.pdfIn PDF document text
    • http://viettelhaiphong.me/data/dulieu/files/51325189327.pdfIn PDF document text
    • https://berettyotv.hu/userfiles/files/25686646342.pdfIn PDF document text
    • http://achwvs.love-mrt.com/upload/files/48170688395.pdfIn PDF document text
    • http://eyupsifalibitkiler.com/resimler/files/senixum.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/f9788d882f0d708daca01910b690a7c3/palofedebokit.pdfIn PDF document text
    • http://dkyangmei.com/uploadfile/file/2021092508104673499.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5266d501c---89736321853.pdfIn PDF document text
    • http://malabarisproducoes.com/arquivos/files/wapabogu.pdfIn PDF document text
    • https://sapporopools.com/contents/files/6399048052.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/gesuzedidadud.pdfIn PDF document text
    • http://www.miyadenthai.com/image/upload/File/vipirobetoxebukelufa.pdfIn PDF document text
    • https://angkalaris.com/contents/files/zulapefibuvufef.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/99355536835.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=counter+strike+portable+mod+apkPDF 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_off0000afe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F8 10916 bytes
SHA-256: 4486e809b143416ce0f91661bb2a6d18a7caaa8a8fe4c4fcb780ad327da88ad3