Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6449bbbe780de7c…

MALICIOUS

PDF

78.1 KB Created: 2021-06-26 08:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 737be13663d43805471fa9d522b02fac SHA-1: d460b9d02bf11664dedc4911c81f624d6264a5aa SHA-256: e6449bbbe780de7c63d3fa46ed0de4582f666c59a200e5d5661e8793f965c5d5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS upload storage and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL targets suggest the PDF is designed to lure users into clicking links that lead to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6957

Heuristics 5

  • 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
  • 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://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b3f58926d---gipijub.pdf In PDF document text
    • http://2ds-creations.fr/userfiles/file/jopexovavutatowase.pdfIn PDF document text
    • http://sarlampa.ru/upload_picture/4349720272.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/17134118916.pdfIn PDF document text
    • https://culturasiapamplona.com/guiarte_userfiles/files/23457508245.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/4087973091.pdfIn PDF document text
    • https://coevent.ru/upload/files/92619619144.pdfIn PDF document text
    • http://poorclarescork.ie/images/31185191018.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082980f718ff---95026717610.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944bebf4064---faxonav.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/riwemiwaseler.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/47ac2af6019f20029ac3ee105c0f3a22/pimupidefepepikeko.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606cebbd674fd---baxexabejezerelike.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf868a67ac---29682395598.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/zizorapomelo.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/d6892fe281b8ebf5217ea3f014d2cdfd/midimifididegamex.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/993e961644f7f88b86f52f5ebf45b55e/pixavasugaduwu.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/49123259476.pdfIn PDF document text
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a14bedc74---33898861102.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/5229e6d883d8241514f3d94b3851ab02/69366499727.pdfIn PDF document text
    • http://vector-luczak.pl/new/fck_user_files/file/tuxatiwataveginutew.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/7765736882.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a1b870007---6847702544.pdfIn PDF document text
    • https://esprimagroup.com/userfiles/file/27238285002.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=what+is+long+jump+measured+inPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12375 11060 bytes
SHA-256: 9b24484bc90645e0ae536f895926e72daf21d406e307972a2a9cb4070f336eaf