Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3bab1d4bb64d5d6…

MALICIOUS

PDF

64.0 KB Created: 2021-09-21 15:33:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 730ff7247763cc698bf52088001b028a SHA-1: 6823c3b78e28fa12842e6f256d10cb5945b59df9 SHA-256: a3bab1d4bb64d5d6b14e11fd667fc0924fd79981ce34bd394d34b53af333a0d2
124 Risk Score

Malware Insights

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

The PDF file contains a large number of links, many of which point to compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The file's structure and URL distribution suggest it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4667

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://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/wigoziturenagibulonudegin.pdf In PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f0ca5a5b72---45623524146.pdfIn PDF document text
    • http://www.lasallelille.com/admin/ckfinder/userfiles/files/vitukirubogaduralezakup.pdfIn PDF document text
    • https://ideylia.fr/uploads/file/21233257998.pdfIn PDF document text
    • http://jan-fotografie.nl/upload/files/tisidanadewox.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5ef8881ea---83671485294.pdfIn PDF document text
    • http://eurekaelearning.com/upload/news/file/kowufilapabati.pdfIn PDF document text
    • http://geodavidepini.it/userfiles/files/14561822664.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16140e33eb1292---vurisaxuxok.pdfIn PDF document text
    • http://kronikarp.pl/ckfinder/userfiles/files/90349304959.pdfIn PDF document text
    • https://stancijanegrin.com/UserFiles/files/29676913308.pdfIn PDF document text
    • https://interno-kazan.ru/upload/files/57398079805.pdfIn PDF document text
    • http://downtowncincyhotels.com/core_degree/admin/images/cms_imagesfiles/7919605645.pdfIn PDF document text
    • http://azco.friend-match.com/upload/files/kugalam.pdfIn PDF document text
    • http://www.de.ruben.pl/ckfinder/userfiles/files/lilosudek.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/21508311412.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/taxuwepoxibalepuke.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/73170121580.pdfIn PDF document text
    • http://gnox.vn/upload/files/41793995511.pdfIn PDF document text
    • http://pokebarslo.com/uploads/files/7419077786.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142b2c2590b1---96147346481.pdfIn PDF document text
    • http://yonseri.org/userfiles/files/74508167975.pdfIn PDF document text
    • http://aliguoriarchitetto.eu/userfiles/files/2888921961.pdfIn PDF document text
    • http://ave-france.com/pics/files/nagejaxowenizojamerasebak.pdfIn PDF document text
    • https://inprovitargentina.com/ckfinder/userfiles/files/demilelifubeno.pdfIn PDF document text
    • http://tpokebar.com/uploads/files/nisopazijegiximuvinabugu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=widgets+smith+androidPDF link annotation

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