Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc77b6e66afe8600…

MALICIOUS

PDF

83.9 KB Created: 2021-09-05 03:10:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 98678644f28517b589f2171bcf777c81 SHA-1: d5627700101a4398a77e1ab4c9f5bf09be8615e8 SHA-256: bc77b6e66afe86007c26de31509d0ea769bead8ffcc2b8d48e2196d8dff49d29
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised or disposable domains. The primary purpose appears to be directing users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/69387158858.pdf In PDF document text
    • http://innovad-ltd.com/userfiles/file/waguvaferobugegoterepa.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16102f4c04f6b5---98552217454.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16082f8bf4b25c---4795214709.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5453cef29---xajalopawifurasakapi.pdfIn PDF document text
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/87368797614.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1607712f95b547---jafeneruk.pdfIn PDF document text
    • http://willbramephotography.com/pulukegodatalofawoko.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/s83df0cnsqq6746hul55vjru56/nenitavokamebefovemid.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/geganegobafogubelap.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/c3hb75e2psv6tt6fn4cqspd754/benupuwuzax.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/lolijokugigifa.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/95047464315.pdfIn PDF document text
    • http://annassteen.com/ckfinder/userfiles/files/godezinego.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/b590f1fb89294d1b827c911870cda591/47055308859.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c991a960721---66165279349.pdfIn PDF document text
    • http://thaoduocvn.com/userfiles/image/file/bosibeba.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/5e01ab018d2ba2b10b7e7ec4931a9938/gitojuv.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160a72f245e51e---fugalexo.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/47695cb7160061d07cf9cd4fa3240886/lubutodimonitime.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/fomumufel.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/e7dfe86f7970c6e8c2847cfe6ab91d4b/jodonosifokusir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=testament+of+youth+libro+en+espa%C3%B1ol+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

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_off0000e0d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D5 11284 bytes
SHA-256: 6fcea1f58f08a8809abadb32951194ecd333eea627a5865e5455edd236b3226f
font_01_sfnt_off0000faab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000112bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BD 17516 bytes
SHA-256: 6efb5c6eadbcb555b7bf9a1b096466da954889617e969ba3fbf41980de0e8b26

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