Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3f4bb712df21105…

MALICIOUS

PDF

82.6 KB Created: 2021-09-04 07:28:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5fce2f6cf5a4f77caf51bf77d72061a2 SHA-1: 52b913037a75b9229edc7044d05811fa2492b14a SHA-256: f3f4bb712df21105c3b98aec277c2bb9b5ae5cd5f0a0cec918ac55f2b8d3347c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites, likely for phishing or malware distribution. The embedded URLs and the PDF structure strongly suggest an attempt to exploit user trust through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dadb365743---zowemenutib.pdf In PDF document text
    • http://legalinet.eu/userfiles/files/kewasuzaw.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/potumo.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5072b162a---nalomipejogogojoruladesi.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/ppugl66kheh91nggcogsnd625p/97765147696.pdfIn PDF document text
    • http://rcot.by/pics/files/82583500849.pdfIn PDF document text
    • http://tradeweb.es/userfiles/file/xuzutoworifebigefapoje.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a37e320a3b5---gufedep.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/70455923871.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077bf4861709---52266090275.pdfIn PDF document text
    • http://phs1961.com/clients/2/29/29da8dc1278d8f1c58a3d16208bcb4e7/File/fonexesom.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca6c8ea7d4---sedanukavomenawiro.pdfIn PDF document text
    • https://micsys.in/userfiles/file/22872293149.pdfIn PDF document text
    • https://kp-bs.ru/upload/files/15300711619.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082aeb87efbf---17904178322.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/56747110785.pdfIn PDF document text
    • http://preserveproperties.com/userfiles/files/xojesofewufevamuzatu.pdfIn PDF document text
    • http://dichvuhieuchuan.com/upload/files/89001619170.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e404b47e3---goluwonetazoluj.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a3884aab234---panonixuvabuvaforavowag.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161322d76b23ac---vamoxinonul.pdfIn PDF document text
    • http://ventima.ru/userfiles/file/xejebenemexosuturiligixa.pdfIn PDF document text
    • http://web68s.com/upload/files/wowanotasomegukoxe.pdfIn PDF document text
    • http://vhktn.at/images/content/files/mefanibuzave.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=basic+electrical+circuit+diagram+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_off0000e172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE172 16296 bytes
SHA-256: 56ef59ed0676748aa75e4ac83d4f5743109f1ed5cca3594a79d464e0d874016b
font_01_sfnt_off00010b90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B90 10892 bytes
SHA-256: 952d9ce30dddccee722f1e4b05ad9b901a4ae8a38a1e6b0fc61e4669f3290e43
font_02_sfnt_off0001249c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1249C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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