Malicious PDF — malware analysis report

Static analysis result for SHA-256 072e6977593249d2…

MALICIOUS

PDF

70.3 KB Created: 2021-09-06 02:29:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f006a690a624e93eec16575db03cc2a0 SHA-1: 6c7c924e4717e05beccb658fdbadb7d8a55ec2ac SHA-256: 072e6977593249d21fec269cb9c2f642e8934afa40769074586c1e94b020679e
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and other domains, indicating a link farm designed to redirect users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The ML classifier also flagged this PDF with a high probability of being malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5455

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=2017+chevrolet+suburban+service+manual PDF link annotation
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a6e8dde5b---97418934780.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612929aa3bac2---ripudanadutodedu.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/2301dc1bfc5bfad36f990ac597aa0ba9/98400823843.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/12d9ac4bb03d5f268d3e061f6b80c572/16566521378.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/99cabb1ebca62b3cb4b5062ba9f477a9/21648904401.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/piwofitevidesarusa.pdfIn PDF document text
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/52036293882.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/67069306161.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/6763a9b2b7f9e8a3b4a941a8c3646297/luzaz.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160fea115d26a7---mexogumomesoxez.pdfIn PDF document text
    • https://cosmopolitanhotelbg.com/uploads/wysiwyg/files/65462640420.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///tulifawawuwavogapapa.pdfIn PDF document text
    • http://russia-ex.com/98399357985.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/e2fa41c2642be5a367162f4112831874/xuzulajuwagatomiwa.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/23657885911.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/365926546.pdfIn PDF document text
    • http://chaukitchen.com/uploads/files/tijoza.pdfIn PDF document text
    • http://masterref.ru/editorfiles/file/gexeda.pdfIn PDF document text
    • http://vitaminyplus.eu/files/file/74469676345.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/pakut.pdfIn PDF document text
    • https://tramhuonghanoi.vn/upload/files/94837722059.pdfIn PDF document text
    • https://shuswapladystriders.ca/userfiles/file/tonizupewejow.pdfIn PDF document text
    • 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_off0000d33d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD33D 16732 bytes
SHA-256: c5d2fee9c9f9478c462ab208e7acf3cad3ae15cf36617252d738b0fc1f1607f7
font_01_sfnt_off0000fe6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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