Malicious PDF — malware analysis report

Static analysis result for SHA-256 331d02286931f039…

MALICIOUS

PDF

58.6 KB Created: 2021-08-24 14:09:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 56b223f6145a59535d34eca2eed76ea7 SHA-1: 568559d54f860160cb0c0a6fe88f7c655b47066e SHA-256: 331d02286931f03941f6565089a087074fe50e2f62a7b48decbdd5d6666f0260
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting, designed to redirect users to malicious content. The presence of external URIs and link farm heuristics strongly suggests an attempt to lure users to external malicious sites, likely as part of a phishing campaign or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8348

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://ccswcd.com/userfiles/file/folezatarokow.pdf In PDF document text
    • https://eletvital.hu/uploads/files/66445031739.pdfIn PDF document text
    • http://cs168.tw/upfiles/editor/files/70047151507.pdfIn PDF document text
    • http://chiengthai.com/file_media/file_image/file/82639646516.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b86edb91e2---77129780097.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4d3f94a10---54507171695.pdfIn PDF document text
    • https://xn--fiqa735be48e.com/upload/files/tiguwagulepijugoke.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e58421181f8---salemogifupokefeximam.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/30433942767.pdfIn PDF document text
    • https://ptogel2.com/contents//files/kidux.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/12217084680.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bffad58f8d3---losirutebodujo.pdfIn PDF document text
    • http://xn--knstlerische-biografie-arbeit-lbd.ch/userfiles/files/2296002016.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/9244ea740d100a33bb82b6d1b901043a/powojarekafujatamonetaz.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160907159cd966---22103467608.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021063003102873499.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/094e929f15b2d6ddc585531b9e00cf1c/fekusugujixuwewa.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/xaxurolatewolar.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba76b2d41ce---14648000535.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/menapukimi.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/26817721320.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16077e6e8df2ea---49889127685.pdfIn PDF document text
    • http://ranjitabiswas.com/userfiles/files/ketoxo.pdfIn PDF document text
    • http://karunb.com/UpLoads/files/wuzulibewobijog.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/1b2e676ea5f4f2cf7aa6fdd8d20bdb63/kifetefezixiwemuzabov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=diminished+blues+scalePDF link annotation

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