Malicious PDF — malware analysis report

Static analysis result for SHA-256 be792f3b4e5fae97…

MALICIOUS

PDF

64.0 KB Created: 2021-09-16 13:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 68b23c0b5e9b92653a9cfd4ae4f824f9 SHA-1: 69916451989eb4c63ef79591e5db2589193a30aa SHA-256: be792f3b4e5fae9726e014b4fff0ede07b85959365db881a978406cc0c8c48cf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's used to drive traffic to potentially malicious content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7500

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://colorsoftexas.com/ckfinder/userfiles/uploads/tesevivurivedunidu.pdf In PDF document text
    • http://struttur-arch.it/userfiles/files/keterowulefanumo.pdfIn PDF document text
    • https://nusamulticentralestari.com/Uploads/userfiles/files/17785274790.pdfIn PDF document text
    • http://www.seminariomenorvalencia.com/admin/lib/ckfinder/userfiles/files/16786036430.pdfIn PDF document text
    • http://symbolfoods.com/files/file///87979758974.pdfIn PDF document text
    • http://autokolcsonzoszolnok.hu/admin/fck_upload/file/xupesulejalalojoribune.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16135779d133af---67156103421.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/rlm19hkun3na0qlhht8qh4hjtv/jolazalalidiga.pdfIn PDF document text
    • http://www.uds-myanmar.com/image/upload/File/tisufej.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/bidow.pdfIn PDF document text
    • http://imobiliariaimperio.com/files/files/52189042651.pdfIn PDF document text
    • http://aaz.sk/editor_uploads/files/goduvav.pdfIn PDF document text
    • http://noithatlekhanh.com/Images_upload/files/76254340088.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/161375a9c7136f---wonorewogemikilifuwozenug.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/53495595394.pdfIn PDF document text
    • http://trunglam.vn/uploads/userfiles/file/78661025882.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/dazoripizikokizukimu.pdfIn PDF document text
    • http://ratchee.com/ckfinder/userfiles/files/95014076649.pdfIn PDF document text
    • http://studiostocchi.eu/userfiles/files/kojalati.pdfIn PDF document text
    • https://uleshuzatabc.hu/files/file/49604183111.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=should+i+restart+my+phonePDF link annotation

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