Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebb296aa97879f73…

MALICIOUS

PDF

88.4 KB Created: 2021-08-12 11:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b58facde1cf0e75fb9f5c75a1317264d SHA-1: 04675e59650adee3365bf11363b6c63329d57855 SHA-256: ebb296aa97879f73a254a3524cd4b1452e517497ee122858e413cf7255b43d2d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and numerous links pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious or phishing content. The presence of embedded JavaScript indicates a potential for executing malicious code within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • 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
  • 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://laborke.ru/uplcv?utm_term=can+you+mix+budesonide+with+formoterol
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c289a94ad73---54488121801.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9756495af---46862372754.pdf
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/608a2af067f752b4f97834b8ecc393e1/zijosibijefobezivitir.pdf
    • http://titusrelay.com/clients/e/ef/ef304ccc03541e9e6382bef5f13b0a7d/File/bovaxowumojupijosu.pdf
    • http://kingsauto-bar.com/js/upload/files/zekesopekujovuvumamop.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fddbc380c5d---21083377052.pdf
    • http://chono.mn/uploads/userfiles/files/raxivolesusenerajago.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/ogbc0p7mcbnkv2e166jivm38vm/84428356766.pdf
    • http://st-johnson.com/Uploadfiles/files/purepunedoxibugi.pdf
    • http://www.iece.in/userfiles/file/1950247372.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/5a5faa266b6006e6dc20222fba8d9fc0/nifapoxabizeboditof.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/j7fhsp0vks89q8h676j2i8nv3u/82409445531.pdf
    • https://anup.bo/images/files/dolukek.pdf
    • http://fioredda.com/userfiles/files/pegixazupodevedabekuzo.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/9qfp4ssrklle3thb9qb5g8het2/kimodi.pdf
    • https://10playsolutions.com/clients/softklk/documents/_articles_/file/75714811547.pdf
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a1a346b10---lizolu.pdf
    • https://www.traitagri-solutions-alternatives.fr/ckfinder/userfiles/files/jumuvefugosorifa.pdf
    • http://silesiacapital.eu/data/file/difaturukixugesuzatejufiv.pdf
    • http://shlawllc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/19988972292.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775f9bc90f6---dedapupulapiduzipadufamud.pdf
    • https://evrenmentese.com/upload/ckfinder/files/23425486875.pdf
    • https://bloomeng.com/uploads/15889726680.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b447998eb0e---72625016304.pdf
    • 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_off0000f291.bin
c1e652c611ae22e187db30f25262de7cf33b0ddec3727cdec761b2728fa2bd9a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF291 18128 bytes
font_01_sfnt_off000120db.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x120DB 16792 bytes
font_02_sfnt_off000138f2.bin
83819f508954e85472c9dd793d19f1c3650472068e6caabb5704a2cca359c86d
pdf-font-stream PDF embedded font (sfnt) at offset 0x138F2 11192 bytes