Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ab5b5f157611edf…

MALICIOUS

PDF

98.6 KB Created: 2021-06-27 22:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5c8cd61d0f6bbae71a9b08c3c4ba1ceb SHA-1: 2412f23b62ecaa1a8a5a1d80ef3303e2692860ec SHA-256: 2ab5b5f157611edf3adfc300184c253077a6f6d1bc660744f4a0115ee5151352
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://cructi.ru/uplcv?utm_term=volume+of+a+sphere+with+diameter+calculator PDF link annotation
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/58838fac6766b71a5d4bb5177277804f/kefojinofepak.pdfIn PDF document text
    • http://allasclub.com/campannas/file/49552108766.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/revod.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e731f0333---nipamelikofovijoje.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607207ad7f86a---zanikamirizesapo.pdfIn PDF document text
    • http://heibldr.hu/FCKfeltoltott/file/11700016007.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/632e87641d67f2c992db2faea4153b8a/vunit.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/4fea57f0e56c2bfa4d129e73759a3411/bapigaguwebisuleko.pdfIn PDF document text
    • http://sun-eko.eu/files/file/bixufenemeku.pdfIn PDF document text
    • https://kidneystonetreatment.in/userfiles/files/67564904165.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/wemixujovutekov.pdfIn PDF document text
    • https://scanclean.bg/upload/ckfinder/files/62251865610.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/1b74d135cfb4305e80d3fe9885066e44/zotapedubudekoturezujer.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd34120ca8---dulazofirakidulifiv.pdfIn PDF document text
    • http://snotlicker.com/clients/10243/File/nunixuv.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/86138909acff8ed6cf16d0400593bd1a/44218577143.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085d7514b688---30991526113.pdfIn PDF document text
    • http://didaconcept.com/admin/fckeditor/file/6730916081.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f2c5b0f20---kewukaruwogox.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/uumhnn860c41lpnbpa1epuh3k4/zalalemefibuwometu.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/f2872084781cdf14ce982e81f95c6812/tolaputekizunebikifepumuf.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/3b436fb05838909859fd4ebe41a19aa6/vagozemokiroz.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/c8f6c7b53aa8f07f1690433bb1dd88f0/33369936601.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

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_off000116ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116AE 10936 bytes
SHA-256: 5c9c014e34fdb2a9ea775448a3fbb52af15cdde1095b4e8958a86849a36e43de
font_01_sfnt_off0001301c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1301C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001482e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1482E 19016 bytes
SHA-256: f8a0317b4f7161b3b6d5a00c3c83a16cc3463a95a0412b38a235c7654bd64b61

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