Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b23c1f51d92e620…

MALICIOUS

PDF

77.6 KB Created: 2021-09-05 23:34:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: b88cc7cd8182946672ee7c58e608eafe SHA-1: e0748a65ce3dce81edea817bc1d5efee10f1eafa SHA-256: 2b23c1f51d92e62009b0fe2d4a557755d4fd32041756711fe4846c93dbeac376
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards an attack pattern involving directing users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7478

Heuristics 5

  • 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
  • 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://camping-du-lac-dijon.com/fichiers/54670340998.pdf In PDF document text
    • http://quaint-house.com/images/blog//file/fanajizivu.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/29840918725.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/2d4fa284faee84c70e6f21f02bae9d31/78660469916.pdfIn PDF document text
    • https://discovercefalu.it/_data/images/file/28596958622.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf11f23d4a6---87404541537.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/bf93834434453712e8a9e8f43d264d05/xirabukenewarubozunoru.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160f35d6079755---vokijodesikugojuxosenaz.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/worivoketezijewarat.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/ginodusibomiwovibumekerim.pdfIn PDF document text
    • http://dayuntang.com/assets/uploads/ckedit/files/20210822081319.pdfIn PDF document text
    • http://perfekttorun.pl/pliki/80362869775.pdfIn PDF document text
    • https://cambodiaangkorhomestay.com/userfiles/file/jivulajidubesebes.pdfIn PDF document text
    • http://bruningfoundation.com/clients/9/99/99acc79c432c4c389b364f5b25189af3/File/91945385708.pdfIn PDF document text
    • https://gianlucabruno.it/dati/upload/file/polametejudoxajufogorutog.pdfIn PDF document text
    • http://atrsara.ir/resource/files/77667734256.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/tenomu.pdfIn PDF document text
    • https://soechi.com/userfiles/file/15396595282.pdfIn PDF document text
    • http://merwepizza.com/upload/file/tikinaposibawawimap.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/51632690338.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=function+of+nucleic+acids+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF91 10592 bytes
SHA-256: d1df7df4a1bee27c24b77029a511e6639a0142a1a68d7341ce1cd3055cf31525
font_01_sfnt_off000107df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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