Malicious PDF — malware analysis report

Static analysis result for SHA-256 699597ddaed44e80…

MALICIOUS

PDF

64.0 KB Created: 2021-09-19 01:43:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2f969832046d91f07a236407448cdacd SHA-1: 238f35be5ba1aefd0350d4c67387747b3c417d44 SHA-256: 699597ddaed44e8060da4eda52b2a0167e518c42f575d4ab2d22f3bc9b9c5e44
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous embedded URLs pointing to potentially compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using many distinct hosts with few links per host, a common tactic for SEO manipulation or distributing malicious content. The presence of a compromised CMS upload link further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4829

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://aptekarynek.pl/zdjecia/fck/file/47477783074.pdf In PDF document text
    • http://affordableadobe.com/ckfinder/userfiles/files/juremugiwujotilonuv.pdfIn PDF document text
    • https://monyetjoget.com/contents/files/jubura.pdfIn PDF document text
    • http://bmfjhjk.friend-match.com/upload/files/vebowijexeforital.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ff8e1345d8---wivasenorasenonakelovumug.pdfIn PDF document text
    • https://mkontakt.com/dat/file/pelumezituwuwirewefo.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/12745101292.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/savezidewuwovof.pdfIn PDF document text
    • https://drnanemilk.com/tctt/sites/aaa/file/lezaxajisejaxuvolokom.pdfIn PDF document text
    • https://maviet.vn/upload/files/69676320734.pdfIn PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/kupejipuviwajasukozopu.pdfIn PDF document text
    • https://literie-depot.fr/UserFiles/file/xakipasofalufu.pdfIn PDF document text
    • http://sensi-leszno.pl/userfiles/file/tuvixekiza.pdfIn PDF document text
    • http://miyagi.chi-kara.net/Upload/files/mogilejeremunizilu.pdfIn PDF document text
    • https://pracowniatechart.pl/fckpliki/file/dawezepidunum.pdfIn PDF document text
    • http://omeofest.eu/userfiles/files/85434233149.pdfIn PDF document text
    • http://indianspringhomes.com/userfiles/files/sidirujepalabo.pdfIn PDF document text
    • https://www.medicalbi.com/ckfinder/userfiles/files/bomavewute.pdfIn PDF document text
    • https://cincia.ro/ckfinder/userfiles/files/nujagoluwagoxuko.pdfIn PDF document text
    • http://exteractif.fr/pictures/2/rupulefizonotogu.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d57732a52b---89222464207.pdfIn PDF document text
    • https://jairdefreitas.com/ckfinder/userfiles/files/mivosoduzuwofovubapu.pdfIn PDF document text
    • http://hmondo.com/userData/board/file/vitevivarakofofazojaji.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f34f1c0a3a---nuwibovekutonejeburiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=android+app+to+lock+phone+for+period+of+timePDF link annotation

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