Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb4e188b01595051…

MALICIOUS

PDF

79.5 KB Created: 2021-09-01 15:58:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0a39bda3b1df57dbf4084b002544bbb2 SHA-1: 499adf6f3ccb72317b2d8385d0a2617e2a827dc7 SHA-256: bb4e188b01595051a75e3a2eed53e4daf84dfa71dafd7e768c66c4186b22e28d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://synerhu.ru/uplcv?utm_term=cisco+valet+wireless+router+manual PDF link annotation
    • http://3suntech.com/UploadFile/file/20210619101147773.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098327647eb4---kezibovajovuvivite.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de85b5b6ce4---68524881764.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/90243147750.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/59224301555.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/nidunekob.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160b224fc66c7a---82845878195.pdfIn PDF document text
    • http://iuf.kr/pds_down/files/94025505408.pdfIn PDF document text
    • http://delshadian.com/public/userfiles/file/bikelisakusateva.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/em54ol3l5ip4i0k4qatrgvm3i8/16892973136.pdfIn PDF document text
    • http://kayamedbursa.com/userfiles/file/nuxasimubewitedelineju.pdfIn PDF document text
    • http://www.kingsmen-cmti.com/upload/files/jepino.pdfIn PDF document text
    • https://rabudiagnostic.com/userfiles/files/29453856876.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16125735768626---24126623391.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc48469218---96923078416.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/h5revnmla9h4frhu9ecnuinc2b/gugomozufafaketoxiga.pdfIn PDF document text
    • http://vizesblokk.hu/files/file/jozomidifukob.pdfIn PDF document text
    • https://jackinthegymtpe.com/uploads/files/202108202146058545.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609c061d620d2---11841386731.pdfIn PDF document text
    • http://gymostrov.org/gymostrov/userfiles/file/92815244558.pdfIn PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/63992118186.pdfIn PDF document text
    • http://mgtofubbq.com/uploads/files/vodejufi.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_off0000d3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A7 17108 bytes
SHA-256: 75c34f3981e7fd68109e4018115a896319e295c34fc4b9b2efe137fbd0b135dd
font_01_sfnt_off0000ff12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11729 10672 bytes
SHA-256: d302d707e63b4a2cef337ade68a8fcccf1aaac92a17dc7d04dd41eb0ff3275d5

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