Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb4b6168a57b9a82…

MALICIOUS

PDF

81.7 KB Created: 2021-09-07 20:53:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 012f16dd54a2868ab9b2d6469bd15380 SHA-1: a3edf44f5152d673a0b50f6b5a5e4532ff605e2c SHA-256: fb4b6168a57b9a82f08c0642e3201db679220dd2217fae4a7b918fd5628f41b2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a link farm, directing users to multiple URLs hosted on compromised WordPress sites. The presence of numerous links on disposable or compromised hosting, coupled with the ML classifier and ClamAV detection, strongly indicates a phishing or malware distribution attempt. The document's primary function appears to be redirecting users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/d36c9f2054a0a66c580c1e6d2bf1bb81/2638208002.pdf In PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9e9c4f77f---lazosuzifagubobozoxig.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/8d090e6c0854413c96f109691e3feaee/31534638620.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/d6f666c1347073eae06aad2647daad69/43529433632.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160819cd671d0c---30814703744.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8fe3d5a90---15895744770.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/9jkphn50mkd6o7uhl81pcus4t5/sexolepufixaxavawilef.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a54fef4d4---poriselusovidalepavu.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/561db9a6adf967c52a0f7ef0c282566d/56717686282.pdfIn PDF document text
    • http://ncfc.com.tr/ckfinder/userfiles/files/nojobivogapawa.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160930c568157e---wodepukavu.pdfIn PDF document text
    • http://sunnysidehigh65.com/clients/d/d0/d00d1ad1640c45b888f5e58ac216a5d1/File/povile.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/17e5d0950ac12d377c44b0afe77ad666/11897368078.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfb6234d68b---18479007484.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/162561279223.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/she7g2j94m8qdi29b376bo5f8h/mujajusob.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/gbstjg68ekdrkgiusda0in3i5l/navikuxuperumolaxut.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16083ee8db3d6f---kozokitewetafapunavamisen.pdfIn PDF document text
    • https://efnnma.org/files/file/xolabunoxode.pdfIn PDF document text
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/4079569970.pdfIn PDF document text
    • http://emannsltd.com/userfiles/96864961561.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/25136724471.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/34712120443.pdfIn PDF document text
    • http://filtrydokoparek.pl/img/all/53837560713.pdfIn PDF document text
    • http://dmscsmartlifeblog.com/userfiles/files/19248203772.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/kotulutaxulagepidizipit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=silberberg+chemistry+2nd+edition+pdfPDF 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_off0000d8ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AD 11352 bytes
SHA-256: 73b809af0a20daf9144c9d9d1e73aac23d9f226cefd930d630b53e1f8f277f23
font_01_sfnt_off0000f2d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D9 17736 bytes
SHA-256: deb77e923cf3b8b7504280d6b4c19b1a909a049ac3d803306f63fdc8d8d0ca1d
font_02_sfnt_off0001211e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1211E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.