Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3a3458073936df6…

MALICIOUS

PDF

95.6 KB Created: 2021-07-26 14:01:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: be6b9cac4cc2aaf787c5720d7354c9cf SHA-1: e9dad52c033689f925a437ca46157909fa872aaf SHA-256: a3a3458073936df6783511a72849599e3e3bc591f2aecb0b7ead77b85c032a65
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a link farm pointing to potentially compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://abril.pe/wp-content/plugins/super-forms/uploads/php/files/a99rmi2mo6tkg7l3umh8pgjd32/zinokegelo.pdf In PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/sulabizog.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b5babf5c6f6---nubijuk.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/81847201029.pdfIn PDF document text
    • https://butchercurnow.com/img/shop//contents/tapenenax.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdee10826b---bajunuf.pdfIn PDF document text
    • http://15fratrowreunion.com/clients/2/2b/2b18ccadde375fd95e9ac2d5db5aaa67/File/metivodu.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/8f6752abbc79f3a6b8c4d31418d2a4ad/7647144030.pdfIn PDF document text
    • https://mastirz.com/userfiles/files/12073584688.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d4e0c3d6f84---26384776536.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/kuxivuwof.pdfIn PDF document text
    • http://77.158.216.156/ckfinder/userfiles//files/28264342062.pdfPDF link annotation
    • http://solarhomepage.ch/fckeditor/editor/images/file/55823857797.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160909f2d056ca---tepanojisododu.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/legak.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/difopiduwizisalus.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/82256229053.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/794va5mhag4jn829clnpgqfni6/zunabanopakijesofabo.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d82fce9bda---negitoki.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/f1e8b34ec7d226f5f8a1e80d14c5286e/sifoxolumakuwopeguropawod.pdfIn PDF document text
    • https://la-klamm.org/userfiles/file/78973382446.pdfIn PDF document text
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/c77c0e28211f005c2509965b5cf06624/wupeduxelerixegogaxu.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095315f78c98---butuwapo.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160715d1b6f6f8---vepis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=what+is+the+meaning+of+the+word+schatziPDF 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_off00011167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11167 11016 bytes
SHA-256: b989d1b4c6aed7ec99e5bc8d744ec84ef8f1b4a62b1eea517db2924a213b2c65
font_01_sfnt_off00012ac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC2 17208 bytes
SHA-256: 26f728185be72ca8cdd740e697de8bddfcc8c0030b1d250e8f7a30d3c6bbce79
font_02_sfnt_off0001579e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1579E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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