Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcd1be96e7cebd63…

MALICIOUS

PDF

63.4 KB Created: 2021-09-21 23:06:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: dd2e6b2420e41503676d4672c3a2f9fb SHA-1: d756d659ff105d144826d07418660fa6dcf2003a SHA-256: dcd1be96e7cebd633267dac28434ac166295b7e03045c2311f19bf45bd4e3154
124 Risk Score

Malware Insights

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

The file was detected as Pdf.Phishing.Trojan by ClamAV, indicating malicious intent. Static analysis revealed it functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms. The document body is unreadable, but the presence of numerous URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4801

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 http://liveisagenix.com/ckfinder/userfiles/files/lumupoxabolitamiwukib.pdf In PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16135ee3b44d5a---53933883042.pdfIn PDF document text
    • https://www.edm-medical.net/ckfinder/userfiles/files/gilolofiroxutumili.pdfIn PDF document text
    • https://pannonfinanz.eu/editor_up/67271092775.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210920145440.pdfIn PDF document text
    • http://wish-pharma.com/upload/files/99428320048.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/6108628949.pdfIn PDF document text
    • http://el-system.jp/uploads/2012/files/bimefegezorur.pdfIn PDF document text
    • http://gamax-moto.cz/data/dokumenty/notosesux.pdfIn PDF document text
    • https://hattoco.vn/images/ckeditor/files/65541970607.pdfIn PDF document text
    • http://nuovojob.com/userfiles/files/44315603829.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/54250467107.pdfIn PDF document text
    • https://juniorclublivorno.com/sitonews/images_upload/files/1600330940.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7afab73cc---motuzipanotinusijazupu.pdfIn PDF document text
    • http://hissekurban.com/resimler/files/vepos.pdfIn PDF document text
    • https://komunalno.vrgorac.hr/files/vavugosipekuwuleso.pdfIn PDF document text
    • http://transdeliveris.lt/userfiles/file/98932484019.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/45162636524.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e842fc9e88---1311877446.pdfIn PDF document text
    • http://asia-test.informacittadino.net/media/files/vezun.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/2710687193.pdfIn PDF document text
    • http://bjqyms.com/filespath/files/20210903212115.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/logukoxisimadagukutazoki.pdfIn PDF document text
    • https://yifff.se/userfiles/file/39407343794.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=watermarking+apps+for+androidPDF link annotation

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