Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2a15ca8591218b5…

MALICIOUS

PDF

88.3 KB Created: 2021-09-22 14:35:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 44e0afca1f961871e56dd2cce8b0e54a SHA-1: c4ec4e4a07717a2eb5cdd2410efdbb1135b14cce SHA-256: c2a15ca8591218b5eaef5cf1b0538c22a240eb5d9066cd8673610afaf86cea4b
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 contains numerous embedded URLs, many pointing to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users to malicious sites. The presence of 'utm_term' parameters in some URLs suggests an attempt to track user engagement with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://irlanc.ru/uplcv?utm_term=golf+clash+hack+2020 PDF link annotation
    • http://intranet.uts.edu.co/portal/app/ckfinder/userfiles/files/debob.pdfIn PDF document text
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/difomusizemitipulofak.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16144f3aab3087---51620953038.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/9j62ao0sb5ughgv88k2bkracc6/tajopitozudenisosoten.pdfIn PDF document text
    • http://tccsrl.org/userfiles/files/69687305114.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/a0375adb7e0642bc2864e2de49483db7/nofufuruboselewa.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/rokopo.pdfIn PDF document text
    • http://exim5.hu/_user/file/niguzagidoxitesa.pdfIn PDF document text
    • http://mcserpenti.com/userfiles/file/vunagisisox.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16130b20c5fe40---vetatamiborolemavujod.pdfIn PDF document text
    • http://hydrem.ru/images/file/40154048034.pdfIn PDF document text
    • http://pskov.agisinfo.ru/uploads/content/files/55153982356.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/84988c359a59bee14aefab6603d3bbee/38692323716.pdfIn PDF document text
    • http://maysoi.com/hinhanh_fckeditor/file/61459924402.pdfIn PDF document text
    • http://www.village-gaulois.org/gestion/ckfinder/userfiles/files/55480656212.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/giwusumilune.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/jaliwamim.pdfIn PDF document text
    • https://gozdekadife.com/resimler/files/rurukarawuzun.pdfIn PDF document text
    • http://jumpstart.mobi/ckfinder/userfiles/files/sokejegurunumowasuroxi.pdfIn PDF document text
    • https://keluargamimpi.com/contents/files/17235034696.pdfIn PDF document text
    • http://studiogaleazzo.eu/userfiles/files/jajimimipukukakaxe.pdfIn PDF document text
    • http://babamoleskine.com/files/file/bikixujogeketumogimosa.pdfIn PDF document text
    • http://ellissi.org/userfiles/files/75298542130.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613564a27fdee---gijidifetowidunabumisana.pdfIn PDF document text
    • http://weldingplaza.com/files/file/28705440326.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_off0000f08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001089f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089F 19280 bytes
SHA-256: e6ad2bf5d3811dcade405108407b1b6484c6555863454fd0d5ac6df000793deb
font_02_sfnt_off00013a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A87 10280 bytes
SHA-256: 1fc98e59703558a4de80f4725e0b57875c5d04fc59216c7e7efaaa472f1d9ab1

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