Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad307b620d71e5f4…

MALICIOUS

PDF

87.7 KB Created: 2021-08-12 08:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3b2a23283145d5485f7225366c1e37d2 SHA-1: eb4f429da9738dc834073d413ed8328c561974f1 SHA-256: ad307b620d71e5f43797efa5c029d504b8597f9a6db0ce535d2de70e2de64c55
154 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate maliciousness. It contains numerous links to external websites, many hosted on compromised CMS uploads, suggesting a link farm designed to redirect users to malicious content or phishing pages. The document body is unreadable, but the heuristics and URLs strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7161

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://laborke.ru/uplcv?utm_term=netgear+ac750+wifi+range+extender+review PDF link annotation
    • http://akifkasaboglu.com/esatfisek/images_upload/files/wufuxatulijopopujofod.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/46915652400.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/bbb3c804447ee6f160cbb4e87c10face/lunuvesamuvegowuj.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/a8b0e9e50dcf02d63aac5f00168c0027/90243325186.pdfIn PDF document text
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/lbdl8hhdpjfetosie463i1sqil/melesokitononivotu.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/12630319581.pdfIn PDF document text
    • https://twfern.org/upload/ckfinder_temp/files/20210620070433.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/judinodutikoki.pdfIn PDF document text
    • http://dichvutot99.com/webroot/img/files/12212847568.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/viriribirapimabewisek.pdfIn PDF document text
    • http://abwessex.com/uploads/files/77324587280.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a68c192d0c---40653709495.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f6e88cdf6---43414399025.pdfIn PDF document text
    • http://dailynewsodia.com/assets/ckfinder/core/connector/php/uploads/files/60432252176.pdfIn PDF document text
    • https://jagamimpi.info/contents//files/90918613515.pdfIn PDF document text
    • https://www.poolsrus.com.au/application/third_party/ckfinder/userfiles/files/83119062586.pdfIn PDF document text
    • https://cristalensi.com/public/File/97128929786.pdfIn PDF document text
    • http://biznesfishki.ru/files/userfiles/files/44238087109.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/8e4ff3a89cbab14ba04515e0718aa420/96613138638.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/de11d428f2513a40a203d0f59c25ccab/nixuwulobogesa.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb3ed417ba---vefurogasejuratin.pdfIn PDF document text
    • http://xn--aknmedcal-wpbe.com/uploads/file/sepupekofad.pdfIn PDF document text
    • https://skvacations.com/userfiles/file/97551162566.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_off00013ddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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