Malicious PDF — malware analysis report

Static analysis result for SHA-256 17be75e5c6d74737…

MALICIOUS

PDF

80.4 KB Created: 2021-06-27 15:03:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: c951b77e9ae2b0d834f6aa3ca06c42b2 SHA-1: 3e431ff5ecd4f8c4a2378022615d28ac5afd4aa0 SHA-256: 17be75e5c6d74737b6a29d04be089f2e4785dea15280eaf39051c8e5b9dea780
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. Heuristics indicate it functions as a link farm, directing users to multiple distinct hosts, some of which are hosted on compromised CMS upload storage. The embedded URLs and the document's structure suggest an attempt to trick users into visiting potentially harmful websites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

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://paulsaperstein.com/userfiles/files/paralozamagifajomitafab.pdf In PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094227fe72b1---fukejoverogodobu.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/8328949242.pdfIn PDF document text
    • http://prmakeup.com/Image/files/lojodukubuvedalalu.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/vtqi3b6fbnd6ptdhe2j86otfjo/83468057668.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/31424364766.pdfIn PDF document text
    • https://avela.md/userfiles/file/31038250503.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6bcd383c6---turosofepigew.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/18f20658d72b04cfa948da0bdb790516/33077719643.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc39383273---resofiba.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/7oo8bpfn62qu8eoobdbnrs1pkv/25412191332.pdfIn PDF document text
    • https://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/358b7227ab05e9b14b4a3a7425bb3d61/wegifuvaletesur.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/24262861906.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/dff652925c8abc656d9685f468a6a669/50219768693.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16080c420c9e21---tekedajix.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/vasetupinemaxevozabazubin.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6972cde72---70468879949.pdfIn PDF document text
    • https://ntpuvoice.com/ckfinder/userfiles/files/25018268145.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/2704a1dc6b2f59ceef914d41211c62dd/69813464060.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a285d5c17a2---gidemixojizetase.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/da985c27b0d9c3d7727b8db410dca869/goxometinizemitufuxize.pdfIn PDF document text
    • https://daiichitravel.com/uploads/news_file/89152105625.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/sinamameva.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/6a44551b67329c1a7ab8ac05f7a52424/vukivaj.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb38e4da0e---20861704495.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=premier+student+loan+center+contactPDF 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_off0000eef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF0 10632 bytes
SHA-256: 341e69f3e01c209b06f59099cfe1080975d5ec59ed763d150394e68515c1a7ae
font_01_sfnt_off00010742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10742 17524 bytes
SHA-256: c0caa78bce57bee8edb3f02db2d95e24661d9730105f76fb125f39606a5db039