Malicious PDF — malware analysis report

Static analysis result for SHA-256 73530e67fe7bc84f…

MALICIOUS

PDF

89.1 KB Created: 2021-07-02 07:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1f0f79ac8effb7255323e7b41b10cdd2 SHA-1: 8b972227d5b74ec31e41f7118d91ec04a36493cb SHA-256: 73530e67fe7bc84f2222cac3da19d958e22fe18994a9cbc537e2c0c99939df97
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link T1140 Deobfuscate/Decode Files or Information

This PDF document is classified as malicious by ML models and ClamAV, exhibiting characteristics of an advance-fee scam and MFA harvesting lure. It contains numerous links to potentially compromised WordPress upload storage, suggesting a phishing campaign. The document's structure and embedded links indicate it is designed to trick users into downloading further malicious content or revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c71c5547821---84810204343.pdf
    • http://dotacjedlaoze.pl/userfiles/file/folivavafufira.pdf
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8d340d531---logubapanaxusewexuzudepi.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e9aee2df3---vilebagagojawutawef.pdf
    • https://burkina-businessschool.com/business_school/uploads/file/xaxixokapemanirazop.pdf
    • http://bosch-service-center.ru/uploads/files/lonafaja.pdf
    • http://chamdure.com/DATA/files/85186485930.pdf
    • https://holocaustresearch.pl/nowy/photo/file/zogati.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/4c4d6fd5b637fe0f68e68c18f9703bb0/81789759925.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16079ce035a8f9---21523792564.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f27901eceb---30773412170.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608dad957b458---9523052566.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/fdhid0vtqrqpjdal1c8poadll6/magijibonoparipox.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091c5ddb9141---kupixikebufitogibin.pdf
    • http://parkhigh65.com/clients/4970/File/38801715392.pdf
    • http://sugarfree-gelato.com/upload/file/gozazumerokibunej.pdf
    • https://melz-feu.ru/upload/42984561203.pdf
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/23c25b6bc750b6cfb147b268f74b705a/88872410455.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/8fa4b11b9bd953e69480cc025be3ff96/lalanutofapiso.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16094ac8c856ea---65335943459.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/20ac076c08e8145c0c02a64d2c4e02a9/tagarixade.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=pan+card+form+filling+format
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa3c.bin
ccc103f4e8f472a72017bda3f6cf2c0a327a6b3fe630925b68acce1138ed21fb
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3C 17368 bytes
font_01_sfnt_off000127e1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x127E1 16792 bytes
font_02_sfnt_off00013ff8.bin
3a087d038538f521641d12f4cfc53132281e4252c3e55b04eb7a32ae672d25ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF8 10520 bytes