Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d92d30809719136…

MALICIOUS

PDF

89.7 KB Created: 2021-06-27 15:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3623ef998564592fa710115f1b51da7f SHA-1: 5c9b9399bd6d284a7675994fafc977070840a8db SHA-256: 1d92d3080971913694567d04f47626e33b625e7e3f11739898bc1b0da7a6b77a
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier. It contains numerous links to external PDF files hosted on various domains, many of which appear to be disposable or compromised, suggesting a link farm designed to lead users to malicious content. The presence of these links and the overall structure indicate an attempt to lure users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://clubforeducation.com/FCKeditor/userfiles/file/43030842061.pdf In PDF document text
    • http://amoy-art.com/Upload/file/xegukop.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/bumonoviriso.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/gugiwadunuj.pdfIn PDF document text
    • http://thebrownsfamilyreunion2008.com/clients/81208/File/vuwebewu.pdfIn PDF document text
    • https://fundreamz.com/ckfinder/userfiles/files/gisiremafefezizurokal.pdfIn PDF document text
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/5407k6la8t1ioi69uue3ocapjn/lujofixojopuk.pdfIn PDF document text
    • https://gachbinhduong.com/upload/file/supepipon.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/nbcvd7admmt7b154c0k8d78b3c/14062458352.pdfIn PDF document text
    • http://lukasikgroup.pl/Image/files/baxadesinuwaxabudusiwibob.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/7d9d3515475dde2558e643bb80d572c9/67250023151.pdfIn PDF document text
    • http://bharatdarshan.net/rgroup/ckfinder/userfiles/files/lasenu.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/2hifnns83duhcj2h6imcsugl92/69040154397.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/69536848720.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160838e8094b9e---71496244834.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/a05e4cd72717ac5dec57bebe5f6132a5/pamilulemudiwas.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd4a120677d---musijukibilisotivaw.pdfIn PDF document text
    • http://architettoletiziamasciotta.eu/userfiles/files/48723844246.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160901728326c8---25989581762.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16088bfff21bba---xeradoputazevipobi.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/2844dec88bbaa57d97424e0357e8fa41/23130810350.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b25e6ca16af---turoxipuva.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/350017142487b123d774882b59361aea/pulug.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/ripavukujipekegezazukuxu.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16070d8b13993c---zanebifapivene.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/16097969ed520c---jeduwanasajupasojo.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/970mgia4vaj0dpqa0aojdg1nfr/97627778353.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=marzano+guaranteed+and+viable+curriculumPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DF 10904 bytes
SHA-256: 2e4ff6d81c7d484db419751d18419fa425575e1c2b4d85f4c88e0e1a64cf5c64
font_01_sfnt_off000112f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B06 17588 bytes
SHA-256: 9c0e7a8d89a8fa2337d20f10f5d2df7b29dbe26ddea74cea44b4c978fef7f5c6

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