Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffb2aa2644c5969d…

MALICIOUS

PDF

71.5 KB Created: 2021-09-02 22:21:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: db3c6ae8272c5f7c6901d492ded9c86c SHA-1: bdaaa392ca58f0cd95039a08dde5fb739572ddfa SHA-256: ffb2aa2644c5969dbf5eb27e828f8e18113751c8cf5004c0f2285c5edc5427e9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links indicates an attempt to exploit users by directing them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/126368633ef86a5494906d2f2ea66975/38944603171.pdf In PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161141c12a7699---34078458977.pdfIn PDF document text
    • http://daiichihr.com/uploads/news_file/34329598708.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce190089d7---lujagosaxizumosi.pdfIn PDF document text
    • https://braus.uz/images/shared/file/61996509290.pdfIn PDF document text
    • https://taybaite.com/userfiles/file/76576804107.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/128980b74c13c58208eab90c7056ec79/tugozarut.pdfIn PDF document text
    • http://porpora.info/imagenes/imagenes_contenidos///jojezomivepoke.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/litikofurovezadob.pdfIn PDF document text
    • http://highgaincomposites.com/img/file/2021873726.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/fudaxofusevajaw.pdfIn PDF document text
    • http://byecook.com/ckupload/files/xezipixetiv.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/25ef03cf9673bdb3083ad4c5d4ad384f/82538427470.pdfIn PDF document text
    • http://bigdoughpizza.com/uploads/files/viditu.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/waxunuzaj.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/10156116203.pdfIn PDF document text
    • http://scuolascifondocortinadolomiti.it/userfiles/files/dezosoromogelegewu.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6c6bbbc97---girakaxokapu.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/33274395139.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/wuvovam.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/j9fbu1bqtsk6qqq0s2rj3r01in/14627170547.pdfIn PDF document text
    • https://affordans.com/ckfinder/userfiles/files/26728490593.pdfIn PDF document text
    • http://josephlillianmorrisfamily.com/clients/59960/File/58718761260.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=que+es+la+globalizacion+cultural+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_off0000b8ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C5 11156 bytes
SHA-256: 11d3eb23e105c9bdfcb9e7ee73c18135f338302e9a701fa12b3d27e0d568ff7d
font_02_sfnt_off0000eaae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAE 15488 bytes
SHA-256: 4f7f1fd9ef15ae658b87727ce051aa118f59473b13fb9ad94185beb2eeebc6d6

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