Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6910602e2f69b24…

MALICIOUS

PDF

53.3 KB Created: 2021-09-01 02:31:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: af6b4fc84c87ff1a879f6f5251ef89d9 SHA-1: ff52571811798e2fd6ba4b4d97efce27f7732418 SHA-256: b6910602e2f69b24c2c9bff549a0a0daad9b34ab129ada2f5b87b6a7022a50ac
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, several of which appear to be compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure suggests it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9331

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://vieclamkinhdoanh247.com/upload/files/31531846512.pdf In PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/3li5fjmp1fg9hmdja3sfir0naq/pareluvezokox.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/selekepaz.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ab78255e003---5829473691.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/tepejav.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/dixipavadubomaj.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/56688614173.pdfIn PDF document text
    • http://bluebirdcanada.com/FileData/ckfinder/files/20210624_E9BAC9FB823C2C48.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/48568727175.pdfIn PDF document text
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/70770073400.pdfIn PDF document text
    • http://dgkno.cn/upload/29733006002.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/9fcd1266525db3b5654ebfecf332d22b/32151771888.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/f47cf2938f10b92e859116fba84c0559/xokujaxodakurux.pdfIn PDF document text
    • https://dgssu.com/upfolder/e/files/20210817095801.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/fopep.pdfIn PDF document text
    • https://q-web.ro/wp-content/plugins/super-forms/uploads/php/files/j4cnuqfk1v28guklv3o1537sna/kadivan.pdfIn PDF document text
    • http://tivatijapan.com/uploads/userfiles/file/86485353045.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/4np2a2q263jnab7gat7t9vgv01/xajubaz.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/9e5a7c3a51641898171ef4343729d910/gupor.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/musot.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/larunifu.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16073fbef43240---37374523050.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076332ebb5b2---vibemoverezegigozab.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/kaxibanobebaka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=protein+calorie+malnutrition+cause+of+deathPDF link annotation

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