Malicious PDF — malware analysis report

Static analysis result for SHA-256 159166bd65d211b5…

MALICIOUS

PDF

81.3 KB Created: 2021-06-13 09:38:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 32537cd7eef00d6b320006f751d1c56e SHA-1: 6901c0cdf475151b448a5b7c748e0699e43f28b3 SHA-256: 159166bd65d211b5bcadc4057d601839856c70652668f495c3ded49c56b6a588
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The presence of 'utm_term' parameters and the 'filmywap' reference in one URL indicate a lure for pirated content, a common tactic for distributing malware. While no scripts were directly extracted, the PDF structure and link farm heuristics strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://chcial.ru/uplcv?utm_term=bollywood+movies+download+filmywap PDF link annotation
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/2f5a52346b638568ca21346e4e24c7b7/67419104651.pdfIn PDF document text
    • http://www.asslar.de/downloads/67438225719.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9fa008dd6---13618554258.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608463aad21d5---rivufamisovasiwajedasu.pdfIn PDF document text
    • https://veterinarycarefoundation.org/userfiles/file/98379136575.pdfIn PDF document text
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/3f9f56265fe43e2223182dceff8689b5/legisigitiniwolojaxe.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a62c5e9061a---masuzememomepizis.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16083455492052---1823329016.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/88871169342.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4c3177a84---pujalebamofepasidifak.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e54e4d380---favalufolagen.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/58776781481.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/foxadokavezojuxewoweja.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/j0104t3u5av41peoqst4sfukdv/laxizizefetewazifekof.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160964c5b41e29---dilupidawogudenegamo.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/0b1a7827d87562e405a18f55ead9b951/73521853859.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a59dbd349---sezakejoni.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F3 5100 bytes
SHA-256: 9a9dd6ff35ed3e0a7617a23380e5ac26334ba8c3205d44ba86819d362ab53d83
font_01_sfnt_off00010453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10453 11016 bytes
SHA-256: 1241b734762b8eb662536c1018923abc74e15212ac2aecebb78176f5f77c2a2d
font_02_sfnt_off000129ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129CE 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3