Malicious PDF — malware analysis report

Static analysis result for SHA-256 e159a5e2c19c126f…

MALICIOUS

PDF

77.6 KB Created: 2021-09-07 19:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 711cd068fbb390f8c9e660fa3474823d SHA-1: 150140d3adc9d2fe9d3353fbc024771c0d9552c4 SHA-256: e159a5e2c19c126f2d0c05a32b2741f31d08758a279ba3ddd7170d0a335098f3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as a link farm. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution through these links. The file's primary function appears to be directing users to potentially malicious or compromised external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7248

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.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bae9b0799c---95625505442.pdf In PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/e4d7aef25d7e0f3254a24a9a1267c510/vavekevalefekiten.pdfIn PDF document text
    • https://lederstuhlshop.de/ckfinder/userfiles/files/wibimejubadu.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/9949171073.pdfIn PDF document text
    • http://slippersymposium.com/clients/875641/File/kopupulido.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080287a28248---texuvivu.pdfIn PDF document text
    • https://kanalprofi.at/UserFiles/file/suporadewageverukunuwi.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/9u35infstb0nqb47eoet3i5sp2/tozefinorodisoxuwuzidu.pdfIn PDF document text
    • http://veterinariomauracotti.it/userfiles/files/fawamifawise.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16088834f5a75e---xuxafeduvawijezaxafit.pdfIn PDF document text
    • http://wanyuantemple.tw/userfiles/file/divakipobavalaxolimufo.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072decfd788a---kirikegas.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d1e700e0183---39387577277.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160771da10c540---53526574293.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16104f3a05c2fb---zanavodobenago.pdfIn PDF document text
    • http://lakesnwoodskerala.com/uploads/file/sujipexakitovodinim.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/bro9rl33s0duvtigd36ikr26k3/89339735351.pdfIn PDF document text
    • https://iaido-iaijutsu.ru/userfiles_exc/vogeluxunurudipadikig.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/7in2kidvuuk6d4kbo2p46k87dj/wimovozewenopavuromil.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/47332463119.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/52739467268.pdfIn PDF document text
    • https://armandofalconi.net/userfiles/file/1355894918.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=seakeeper+16+installation+manualPDF link annotation
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/59804927831.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA2 18824 bytes
SHA-256: f7d9cd8a533a6b8bcf04cb835cec67066ccbbc3b9c3193ced907fa7aff6c25fa

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