Malicious PDF — malware analysis report

Static analysis result for SHA-256 578024eccd9ace65…

MALICIOUS

PDF

71.7 KB Created: 2021-06-03 14:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ffea19e8254be0132652a6a833f0d09 SHA-1: af5dcb28e2a6a1e67c42e82a3115d43d88c29c8b SHA-256: 578024eccd9ace659e5b8ea1c6ce370fced32e487db258576e5c83786a9dad29
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a link farm pointing to compromised WordPress sites, suggesting an attempt to distribute malicious content. The document body, though heavily obfuscated, contains references to movie downloads, a common lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the download and execution of a second-stage payload via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bevillelecomte.ovh/ckfinder/userfiles/files/mibufimuworeni.pdf
    • http://wsm.hk/images/uploadfiles/file/61723342150.pdf
    • http://www.cddfct.com/up_files/file/mutonexajutu.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8191d904f---wugidewuwafinaguzabe.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f128067d3d---jikovu.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/0600a4acdf3afd47e6e6e9649c69efbc/bogefipeleroguwupuxo.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/0dfdc75747a95ae5fe06e7e924da561f/nasejimisuxizen.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d21abbdcf0---82058906404.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/vb2ngg983fhpiu1mqbf3u4vhe3/30036283421.pdf
    • https://a2designbg.com/userfiles/file/61911192091.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160755ba4db40d---tebonovudikunusorovux.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4bea7bc6f---77142124690.pdf
    • http://didocrosby.com/imagenes/file/71673217575.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5a8bbdb36---47711214325.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087136c2dfb1---wajulom.pdf
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/4l4o12cknlti21f0retbk23tep/xigemenuvivofi.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/17jbiderovncrk5t4ufaubuta4/20206365648.pdf
    • http://ezibra.pl/upload//file/bigubugogirofivapofu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=jack+reacher+2+full+movie+in+hindi+download+720p
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daf3.bin
dce17e2dac92dd0db2a418e732810f51c47028da2fa2eee478872915f317c4e8
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF3 5776 bytes
font_01_sfnt_off0000eea3.bin
ee51869975791d90a83482db86811c28698e1b4173b11f4dd22ce125f4034cc1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA3 10204 bytes