Malicious PDF — malware analysis report

Static analysis result for SHA-256 72a4c903f496c960…

MALICIOUS

PDF

97.1 KB Created: 2021-06-25 12:34:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8a2dc490f0b330558f0727754f2fa598 SHA-1: 51ab709f1a24be54e5eeac5d68170ea37be7e5c7 SHA-256: 72a4c903f496c960835a0acff12f693db6ba835db0b6e9a447976bfec931903c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to distribute further malicious content or redirect users to phishing pages. The use of compromised CMS upload directories indicates an attempt to leverage legitimate infrastructure for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • 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 http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714eeb8869d---44024543858.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/r2d4vh6rmgiu92p2pneonst78g/63653315188.pdf
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/350a96ddd91e580b9cf860d8f23fabe7/xonaxejebilitiba.pdf
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/e29d05a020de9dbbd1284bae2fe10c82/gakanimorozugozifekugeme.pdf
    • http://extracam.es/app/webroot/arxius/file/50129450701.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba8a101023c---danigugiwuxuvodij.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/1f534367dc1eb9713b8091be33aa6c08/55681660960.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2d6b6d52a5a5318856efe84cc48dabde/50989348496.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d07c5d3fa---vakuzaxomasutegulakube.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/1d8a779695245d7365ef1484ef974954/44903382608.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608092c51b048---fovojuzuz.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f6a9eb05b---nuvub.pdf
    • http://alkanboya.com/files/file///90990523550.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee9d8dc4a1---winat.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/b2ca6828554763e2ab064e6a580c4b92/kusegejeno.pdf
    • http://aranykoronakft.hu/userfiles/file/90979714606.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=effective+communication+worksheet
    • 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_off0001180f.bin
f31af31f47a511c908262e7ea8e3f7e4b326278383f9cd8e6f52be8955cb2c02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1180F 17872 bytes
font_01_sfnt_off0001468e.bin
c033226e0b4aa5035cffddb26249655015243dfaa3e619f739471a0636c9a06e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1468E 10880 bytes
font_02_sfnt_off00015fa1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15FA1 16792 bytes

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