Malicious PDF — malware analysis report

Static analysis result for SHA-256 e37fdfcc8930d3a4…

MALICIOUS

PDF

59.5 KB Created: 2021-07-31 03:54:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d2c7aadab0418b277201cb3623875204 SHA-1: 3189ed937ab804cff824024b37c258b0a98eb85c SHA-256: e37fdfcc8930d3a420600eaebf16092ef72177d7e2bf1d7865c336d3ed85d6b9
154 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and ML classifiers indicated maliciousness. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics confirms this behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9569

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://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/7955c813aab04e9f5ebb42ea06eb0833/31806863391.pdf In PDF document text
    • http://akinmedikal.com/uploads/file/gakuvotinaxijifa.pdfIn PDF document text
    • https://economiadecomunion.com/ckfinder/userfiles/files/wevore.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/daruziduti.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/52112663202.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc9de683ec---saxubolori.pdfIn PDF document text
    • http://edanieltour.com/FileData/ckfinder/files/20210703_1CEEDE2C2899A80D.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f11526bc86---zidunofotamunu.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160735f7c12684---38149151703.pdfIn PDF document text
    • https://nezrenweb.com/calisma2/files/uploads/zizobomexew.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/dvev091aoftjr61918jpkid9v2/92693936716.pdfIn PDF document text
    • http://bagumul.com/file_upload/spaw_upload/file/20210513101024.pdfIn PDF document text
    • http://rockhouseschool.com/rockhouse/uploads/files/velirasuxasopavarapexi.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/a6v0g0ujgbe7id96hsajoomdb1/nobodopapimegepif.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743a2d0146c---88677415793.pdfIn PDF document text
    • http://studiopetrilli.it/userfiles/files/pipememetodogetarezugefis.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/5a36e73824c4c0c3492b40f82f0e48ec/vetafupiluzabu.pdfIn PDF document text
    • http://phsbulldogs1966.com/clients/8/87/87911cb64b10f66d93d15f7b6e22d365/File/84652789836.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/8874ba35976a04ff5038c3de76cab88c/muvolidusemedatifofudete.pdfIn PDF document text
    • http://remont-elektro.eu/archiv/file/45092977973.pdfIn PDF document text
    • https://hssanesteban.cl/files/dedinitepopisilomalizure.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/55029698025.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/q354iko3u3pketveeii8hg6sep/wazevisexuridi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=what+size+file+for+husqvarna+450+rancherPDF link annotation

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