Malicious PDF — malware analysis report

Static analysis result for SHA-256 041ffefc829b87f2…

MALICIOUS

PDF

62.3 KB Created: 2021-08-18 02:06:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2fe2271e1b4cb624ccf9acbe420ebfc4 SHA-1: fafab0e5df7913f967c2b7850d411cae7d7fe0c1 SHA-256: 041ffefc829b87f207fdc418611c16bd58760fa0c77f6e560188d3dfccd840ad
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting. These elements suggest the document is designed to redirect users to malicious sites, likely for phishing or to download further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9043

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://nomylo.ru/uplcv?utm_term=vintage+o%27keefe+%26+merritt+stove+for+sale PDF link annotation
    • http://peach2560.xyz/js/ckfinder/userfiles/files/62843088999.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/7ce603ab0be6dec663b3d39aafa1b409/koseraramaxisuveko.pdfIn PDF document text
    • https://corpeverest.com/ckfinder/userfiles/files/34338009120.pdfIn PDF document text
    • http://traviet36.com/upload/files/11729439479.pdfIn PDF document text
    • http://xn--80ahcjevtqq.xn--p1ai/ckfinder/userfiles/files/15888193978.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0a5aa1cb8---kigafigasodixe.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/54700295999.pdfIn PDF document text
    • https://hchoanglong.vn/userfiles/file/37757844466.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/2c8e24mtkn097l155u9ecj14j6/zugirosowefewubixa.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/af6143bace8a6dec49b6046650f76801/93561518547.pdfIn PDF document text
    • https://digireg.se/upload/tokujesevaxofifusepe.pdfIn PDF document text
    • https://lesura.net/userfiles/file/bigubilemibog.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/20d4dc54873b7b63475a0efe1204405c/49892717021.pdfIn PDF document text
    • http://shs67classreunion.com/clients/b/bf/bf9552935413f2527bbee995f2dfc9b5/File/tutiju.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/1eb8d64f7311665e62fda18b95e19ed7/45625107228.pdfIn PDF document text
    • http://fatamorgana.fr/uploads/assets/file/valikisomakakasuzutesof.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a075234e99c---wudaluwurukifirebonojog.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/215e1b31d82379bec120d91fd9bab074/71447454260.pdfIn PDF document text
    • https://aviseco.ro/userfiles/file/vafeparowi.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2e9101c79---91378694801.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/187e2b4e5b1b4bf496c5a44ab03aa92f/jugezifafid.pdfIn PDF document text
    • http://eca.or.th/ckfinder/userfiles/files/xigekurepanalukip.pdfIn PDF document text
    • https://foulardfotografando.it/file/52685168106.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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