Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbbb05febba3c7f5…

MALICIOUS

PDF

75.9 KB Created: 2021-07-08 04:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c2d05f50313110b35112afe087b30968 SHA-1: e4b551ca0e0d742d6e78cd8dcfd3433260c56f2e SHA-256: bbbb05febba3c7f586b2bfbf8258362f125cf3b947ceaacf10e33f5fd6534118
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm pointing to multiple disposable domains and compromised CMS upload storage, suggesting an attempt to distribute malicious content or phish users. The embedded URLs, such as http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/sj5esaakbqs87slmj0ubkmjgl5/wugonudunitoxorekuvuj.pdf, are likely used to redirect victims to further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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 http://ehomeforeclosure.org/images/file/mapoti.pdf In PDF document text
    • https://ludifrance.fr/userfiles/file/kosepule.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/xivuriluj.pdfIn PDF document text
    • http://global-insurance-broker.de/downloads/vivexovofu.pdfIn PDF document text
    • http://dchs1961.com/clients/871949/File/piloxevajevisodoguwo.pdfIn PDF document text
    • http://svazekobciorlice.cz/userfiles/file/43660593642.pdfIn PDF document text
    • http://sushistoryus.com/uploads/files/jajupisufo.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/16085485089c72---94896782758.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9aff1057e2---93708296837.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/fifobiragulidikaninezol.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607e24b5837c7---26770034850.pdfIn PDF document text
    • https://lasanisports.com/files/nuzirebivunosajep.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021052720561741.pdfIn PDF document text
    • https://ivanamihic.com//files/62842089792.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8707c2a80f---fuwoz.pdfIn PDF document text
    • https://krossi.ru/images/content/files/81969782156.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6dab8e66a---suvoxodojezog.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a2835a28b5a---xipenefaxejatelapabo.pdfIn PDF document text
    • http://studioturina.com/userfiles/files/lagofokubadedalixano.pdfIn PDF document text
    • https://study-abroad-travel.com/ckfinder/userfiles/file/10473975710.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/j8tmp969e2jo2qgqrlnqak7j6t/bujumikubovuvibonapugixem.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/iebpmnmoc2p4amnphf65de74h0/98593118018.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbdaaf3ccb---galamapilagi.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/sj5esaakbqs87slmj0ubkmjgl5/wugonudunitoxorekuvuj.pdfIn PDF document text
    • http://scro.ru/pic/file/77803005515.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609b52173e3b2---61676995691.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/gexoguradixadatesose.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=jah+cure+call+on+mePDF 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_off0000c62d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC62D 17312 bytes
SHA-256: 3370d6b3ba017c0ae95bae0c14d85dc070d1cd6d752631c426f03a1874ad8445
font_01_sfnt_off0000f3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B2 10228 bytes
SHA-256: 41d4d6b90230e61289fac7b18174ecb9adcbbe2afee2a3a1d140cbc80e743ad9
font_02_sfnt_off00010a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1