Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b547524c363e89c…

MALICIOUS

PDF

85.6 KB Created: 2021-09-04 15:22:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f912d45f9fa16b6a39ead00f52edb2ac SHA-1: 52c9ddf5668ca931edc24a9050d550af7ab20b1d SHA-256: 4b547524c363e89c5f0cb021751af0680f84d06fe73ff102d7d7370fc408559a
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that lead to compromised WordPress upload directories and other disposable hosting sites. The primary purpose appears to be directing users to potentially harmful content, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://allytemp.ru/uplcv?utm_term=digital+marketing+book+by+seema+gupta+pdf+free+download PDF link annotation
    • http://harckocsik.hu/userfiles/file/darugemobusi.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ae4f457ffe4---18268780101.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b44af11a757---ketobakeneputarivoranu.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/ec9g3bhkpop6m391jvt4jt66id/zewadipuwuw.pdfIn PDF document text
    • https://tcremich.lu/files/files/91310941877.pdfIn PDF document text
    • http://bukharasuwanee.com/sites/default/files/file/xujukif.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a219a974aa---vofukudewumog.pdfIn PDF document text
    • https://propactionvehiclesuk.tv/userfiles/files/14634436435.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/88623568963abb3dc5e3d071097ad390/bikapuru.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/u0arpmcmadrcutv612v48cgkvq/vosuvabazujiragiboge.pdfIn PDF document text
    • https://weldingportal.it/userfiles/file/wuletipogolinuzele.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16078a74b595d8---45057086865.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/xazotafed.pdfIn PDF document text
    • https://kuni.ro/app/webroot/files/userfiles/files/25821355236.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/6cb129f83ba1da21c95086e9e770c6ac/780495471.pdfIn PDF document text
    • http://hokeypokeychallenge.com/clients/7/77/77ac66e313b6cb4bf602f1678accca72/File/87110159864.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/161182cfe2827b---pakulolipopekose.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f3e065eca0---16415794084.pdfIn PDF document text
    • https://www.ijestr.com/ckfinder/userfiles/files/vusodefozerik.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bdff6e6452b---82632915588.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080927cb6f04---24368862687.pdfIn PDF document text
    • http://hattingtoemrerogsnedker.dk/userfiles/file/mimedoreziluge.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/1eb20681bf48b25958105422d809c6f6/ruvixoremuvitefa.pdfIn PDF document text
    • https://zoorichi.com/temp/fckeditor/file/23248121120.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/kujizifezaloz.pdfIn PDF document text
    • http://dolinakrzeptowa.pl/public/upload/ckfinder//userfiles/files/rupabobijik.pdfIn PDF document text
    • 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_off0000e7a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBA 11376 bytes
SHA-256: 3c3f81c27533537806883f1bb45a5349f7898bc2bf66075c86b799e94e2ba1d8
font_02_sfnt_off00011a28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A28 17556 bytes
SHA-256: 1aacea2b1f683101ef0aa4efb9817d591e8fead2b67774ec0b6dfc3017e1a3d2

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