Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47af57d040006c2…

MALICIOUS

PDF

95.5 KB Created: 2021-06-19 22:36:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f591318ddafc149f4a64992fcdd7b13b SHA-1: 999d4b077b1a5c441e3d8dc17f4a16369464a60b SHA-256: f47af57d040006c2528d2a7efccda1b2db6b65c848367539488a2db4457caf2f
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6859

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://krisoc.ru/uplcv?utm_term=birthday+wishes+in+tamil+sms PDF link annotation
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096afa66b3af---dalep.pdfIn PDF document text
    • https://bataretak.com/img/files/file/10517113786.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160843a0c349a9---56278605490.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d10969f101---gasunedegujedimevofikodi.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/8losd09e70q1m7a61avr8sqgd8/pexukebi.pdfIn PDF document text
    • http://accronline.com/userfiles/file/kujarolovefa.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/9d81c8c5e4a056f3fc35985799bce27a/19015769924.pdfIn PDF document text
    • http://chiengthai.com/file_media/file_image/file/pederadejuminumikopoj.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/upavqqam1t91lstr2ucb7lcp75/gubomufiriloledo.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607102e64fe83---89780794683.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/dibixeputisaxaso.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708a7223703---79623376561.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/keq5l6j8f43iu2qk9bp1u5jng2/81197074625.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a59958b208c---pifesazigubam.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/27253013536.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/salosemiti.pdfIn PDF document text
    • http://rotarylaspalmas.orgdocumentos/file/72055803509.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000147d5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x147D5 22300 bytes
SHA-256: 9659a616d4d1a6e722ea3f3b3d97cbfd28c05c30467363ddb072bf530a7fdb42
font_00_sfnt_off000135e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135E5 5308 bytes
SHA-256: 005e355a7d760c5339060fadbd1b81a2af77e529c733e218772234c4ba5a2376

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