Malicious PDF — malware analysis report

Static analysis result for SHA-256 59b73819d27fbcde…

MALICIOUS

PDF

132.8 KB Created: 2021-10-04 17:00:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 0afa1871db7394834825869a12bdf8f1 SHA-1: 5c84007f73d5ea0a48fd08a721d350c69c0c409e SHA-256: 59b73819d27fbcdedad0048d3cea1a1b0e9fba4fde64fe4f7159677985ba56c1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. Multiple heuristics indicate the PDF contains numerous external links, many pointing to compromised WordPress upload storage or disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7726

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://oniceh.ru/uplcv?utm_term=2+chronicles+7 PDF link annotation
    • https://heuresromantiques.com/upload/files/pamanigiditikedun.pdfIn PDF document text
    • https://lensmam.com/userfiles/file/piwomizavisalaxuliwedi.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139cf9a06d2e---zuzopuraf.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/94878247692.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/sekekapugixowop.pdfIn PDF document text
    • http://eko-gospodarstwo.eu/files/file/nivokawu.pdfIn PDF document text
    • http://sun-green.de/ckfinder/userfiles/files/65184831736.pdfIn PDF document text
    • http://ambartakip.net/belgeler/file/36708377785.pdfIn PDF document text
    • http://gcsiva.com/files/userfiles/file/19169862864.pdfIn PDF document text
    • http://loca-granderoue-montaletang.com/ckfinder/userfiles/files/28585438984.pdfIn PDF document text
    • http://087334211.kad.tw/kads/ckfinder/userfiles/files/zazixomuwimorupikarigexax.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/5j04eg4muqcgnuiqsv36lfcin6/bikiposi.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/bovife.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/viab1l28o8g9p1l04un1qv0b6q/ruxovotibovesunudosifiv.pdfIn PDF document text
    • http://studiolaviano.it/userfiles/files/21193110412.pdfIn PDF document text
    • http://01host.ru/userfiles/files/dabut.pdfIn PDF document text
    • http://gfk-schwimmbad.de/i/File/818505818.pdfIn PDF document text
    • http://associazionemillesogni.it/userfiles/files/lajagimetubusemesuxevag.pdfIn PDF document text
    • https://tukangjp.com/contents/files/82556003315.pdfIn PDF document text
    • https://10fci.net/userfiles/file/32034281717.pdfIn PDF document text
    • http://donovaly-ubytovanie-safran.sk/web/userfiles/file/89853920725.pdfIn PDF document text
    • http://cyclad.org/UserFiles/file/gibubugajogimazifajejuxob.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f326970b50---16069821812.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134a45e4fbf2---89075522407.pdfIn PDF document text
    • http://aktifithalat.com/resimlerfiles/wigemesun.pdfIn PDF document text
    • http://deborahkay.com/ckfinder/userfiles/files/gogixofibatokewidadesufun.pdfIn PDF document text

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