Malicious PDF — malware analysis report

Static analysis result for SHA-256 30188008053baccd…

MALICIOUS

PDF

116.0 KB Created: 2021-09-06 20:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: bf56d866c2665c4dda2eb9c2044c6599 SHA-1: 629418a6fd3f63a5572c2314f725b2ab32b966a0 SHA-256: 30188008053baccd1afad9f309ed1de3fc2d819a90c0ffcd5e6a3d79f54d4dda
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is a common technique for executing malicious code. The file also functions as a link farm, directing users to multiple compromised WordPress upload directories and disposable hosting sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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
  • 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://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b374bf42ecd---gotafunozukisofaj.pdf In PDF document text
    • http://accapierre.it/userfiles/files/temukugogukavumifepa.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/43967185192.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/42602757117.pdfIn PDF document text
    • https://darshanam.com/ckfinder/userfiles/files/6657661905.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/79ea678e08a0c9c150d9d22c3c35fdb9/76307193126.pdfIn PDF document text
    • http://www.eau-msu.ru/ckfinder/userfiles/files/27303227394.pdfIn PDF document text
    • https://izyskately.ru/foto/ck/files/tizebudezamotejofow.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/6608e87b91a34ce7cdc1828819ad8898/rimadugusofiwepanovit.pdfIn PDF document text
    • http://tipkeo.com/js/ckfinder/userfiles/files/26695160035.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/somedifabalidojiba.pdfIn PDF document text
    • http://futureinfashion.com/ckfinder/userfiles/files/8049186827.pdfIn PDF document text
    • http://talleresjpg.es/img/file/fabuxafitiwomad.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/9ujr7t819n24i996kcj5kuc287/30254751292.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/jugifazexuwuzas.pdfIn PDF document text
    • http://ndc-group.ru/uploads/files/53678488787.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16125e3fc550b2---46953706714.pdfIn PDF document text
    • http://bippex.com/filespath/files/20210807040633.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee58fde77c---38953922440.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/6e5eb4fbefaa91843be413ec53371ac3/94917249442.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/ich5t32mvti9kkk3rajjmkibgh/supuzujademumetoxix.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2977078e1---vovularunikovumeni.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/muxuniwusevi.pdfIn PDF document text
    • http://boxethai38.com/upload/file/369730274.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=ffiec+bsa+manual+msbPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000162c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162C0 18592 bytes
SHA-256: 004d8b382e9ecb8aa3c8ecec667e11f19bab35cad93f1e5ef59459c1e1e0c873
font_01_sfnt_off000192ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x192EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001ab03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB03 10396 bytes
SHA-256: c5025eec3e8b7841fa0459f59e19bc4b2be6af72c90d3c64ff99acdda69c03b7