Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfd25d5bcd0f51a1…

MALICIOUS

PDF

87.7 KB Created: 2021-08-10 01:21:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e61290281a5fc6e97df219b3eedf662a SHA-1: 29957f042fae0033ec7c8fcdb0c1d3ea0fddd78f SHA-256: cfd25d5bcd0f51a1345c511151f67b15f57eb5d22cf160d4d402930bb3b19430
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised or disposable hosting, likely to lure users into downloading further malicious content or visiting phishing sites. The presence of multiple external URIs and link farm heuristics strongly suggests a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://cfi-registration.org/buzzboxgift/img/userfiles/files/badimekagubujib.pdf In PDF document text
    • https://mertlakustika.cz/images/pages/file/60225531486.pdfIn PDF document text
    • http://vuatoyen.com/uploads/userfiles/file/83712054560.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/23153658344.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/13532309d2a1d7d5fdb8761afe077cfe/55259538016.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/03dd9d712ba81c206ed6e40056688f95/kanekurisadavekipirole.pdfIn PDF document text
    • http://al-farh-iq.com/upload/userfiles/file/xuparazesapuxajekavid.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/b3v1rdq6vfbpt8vo0lrqqop0e1/94858636217.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/67cf3e7db44470724404369aa633a8aa/63769502383.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078a0979b70d---vorenodalizi.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/57lgil3amjukcvaudji2c0b0vl/zakosavizurigomin.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/52ff74c21e48f776053850c45f72c7f4/47780807494.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0dd9de633---tevosalo.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9d10b9658a---titaraxixazobenewiva.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/97533082528.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b1bf960ec---ledigizet.pdfIn PDF document text
    • http://baobianhkhang.com/upload/files/noxotolup.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/ketavisoferatarufuzo.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/53542210842.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/wikuvuwunex.pdfIn PDF document text
    • http://www.conectadoscomdeus.tv/arquivos/file/fanaketewusujajusira.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/67067534658.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/58538907882.pdfIn PDF document text
    • https://yar-net.ru/userfiles/file/8933316967.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=aws+solution+architect+certification+syllabus+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f11c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11C 11136 bytes
SHA-256: 6bec9499c69695189a21993635d6cf1d25d9c580acf31b018129e52f64ad733a
font_01_sfnt_off00010aee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEE 17232 bytes
SHA-256: c8da76e0c6824a0dd9c15a073909f395b18c22a20e3ea466f0478d91815b408c
font_02_sfnt_off000137d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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