Malicious PDF — malware analysis report

Static analysis result for SHA-256 a63cb0f06ecae1ae…

MALICIOUS

PDF

54.6 KB Created: 2021-09-04 01:53:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: eeee056d80150441c590c84d061dbe0f SHA-1: 553efdcf8357c0f791d21efc92e4c217644710b4 SHA-256: a63cb0f06ecae1ae0a9a0745479c15cbe3e40b577d99416072ef7e23d2dc7460
154 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised CMS upload directories. This suggests the file is designed to act as a link farm, likely to distribute phishing content or malware. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5715

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://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/8qjsi4tq68f95kctcmfrgfm9ib/15315681740.pdf In PDF document text
    • https://vegas-shop.net/uploads/files/vivadoti.pdfIn PDF document text
    • http://thuexe7cho.vn/upload/files/4045827690.pdfIn PDF document text
    • http://bouncebodysupplements.com/newerac2c/userfiles/file/vobura.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/fawuxuxutana.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/38cee5e86d1e011e8f6a7e4f77f4f027/62096298606.pdfIn PDF document text
    • https://alyosserspneed.com/userfiles/files/gusalaperidopedirujosagib.pdfIn PDF document text
    • http://effektfilm.de/files/file/zevilesikapivexinadedo.pdfIn PDF document text
    • http://makesrealsense.com/ckfinder/userfiles/files/58653679572.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff57f5ac1c---fotitixogetebuwozetevu.pdfIn PDF document text
    • http://sgrappresentanze.eu/userfiles/files/26060998553.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/3m5pf43lc43lkrlf13d96a05b7/89258062600.pdfIn PDF document text
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/55392015156.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/731051eb8fdc215cb8aacf7f7f084071/66271717287.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/63886826594.pdfIn PDF document text
    • http://hopkinshigh1961.com/clients/878968/File/luvub.pdfIn PDF document text
    • http://j-club.eu/userfiles/file/fitanitudivagolib.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/vubos.pdfIn PDF document text
    • https://iltuosarto.com/file/ruxasafejugeduzexela.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ada0fc91342---49937663084.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/51393133156.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/voposugi.pdfIn PDF document text
    • https://luminex.pl/upload/file/nogar.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/denumofibeve.pdfIn PDF document text
    • http://textstricker.de/benutzerdateien/nisadijopaguji.pdfIn PDF document text
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/serizedojoromeli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=insert+multiple+page+pdf+in+powerpointPDF link annotation

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