Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b78b5f1f9b6468f…

MALICIOUS

PDF

80.8 KB Created: 2021-09-03 00:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ed860f8ea57e42179d9724e31250f2bc SHA-1: 39498c67eeba02623e7dc2a572398b6794b1ce78 SHA-256: 2b78b5f1f9b6468fd458e1c8e3c06b323ddd749aa48c2da18bf878ff5c6d8c34
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised CMS uploads and disposable hosting, indicating a link farm designed to phish or redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/0long31ocf3k9i7h54gde0olq1/jukuverinolepelo.pdf In PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f855c5ee34---9236454464.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/9b1cfa99bc9ad68b9733a634f1ae0367/jesadaturogavobikom.pdfIn PDF document text
    • http://berbun.com/user_img/file/jifowarumi.pdfIn PDF document text
    • http://camionespanamericana.com/userfiles/file/zofixebiwupefug.pdfIn PDF document text
    • https://shreenathtechnologies.com/userfiles/file/darixugowubafij.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16107b8b249457---51890308697.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/tikobazudewusegusumetedar.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606c851b1dd55---magazixipim.pdfIn PDF document text
    • http://ijdssymposium.eu/upload/42387885987.pdfIn PDF document text
    • http://nenkin-t.com/upload_img/ck/files/12993120040.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/1a3d43a37e55ce1313672eeeba2daa81/12597844416.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/2moht2ftp9i5r4rfqu66l5a9m2/21597543241.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3a151a280---58735390737.pdfIn PDF document text
    • http://vinczeandlaszlo.com/upload/rutefafunedigigimo.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/73974928040.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd241733aa---fuwagu.pdfIn PDF document text
    • http://www.facyt.com.ar/ckfinder/userfiles/files/37216050763.pdfIn PDF document text
    • https://mm-podium.ro/userfiles/file/57768857279.pdfIn PDF document text
    • https://chrmglobal.com/userfiles/file/xuwapado.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/nanola.pdfIn PDF document text
    • http://teleserviciomalaga.com/ckfinder/userfiles/files/garuxov.pdfIn PDF document text
    • http://ingatlantv.tv/userfiles/files/dijulaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=dash+diet+plan+for+weight+loss+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_off0000d723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD723 17772 bytes
SHA-256: e879d78a25c972f566306f9dc3bdffb2cd1f9936dfbac7a3fdd870b0fd64e567
font_01_sfnt_off000104c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C0 10864 bytes
SHA-256: 1c151dfd6bf68a4284d36260485f98b6925c346fe065965bfbaf989532aa5003
font_02_sfnt_off00011da2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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