Malicious PDF — malware analysis report

Static analysis result for SHA-256 920c6445be49bb2e…

MALICIOUS

PDF

62.5 KB Created: 2021-09-24 22:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: fd4c49e3598335d20459186d95625699 SHA-1: 0c45544537bbafa2691d8c2f7c95a2112e711b57 SHA-256: 920c6445be49bb2ecf0b2fbebcf21751309f66ef73161d3dabb2ce9992e4297d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm directing users to various domains, many of which are hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of numerous unknown URLs suggests a broad attempt to lure victims to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6844

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://1hozain.ru/files/userfiles/files/radunovebepulamizo.pdf In PDF document text
    • https://dwitunggaljaya.com/sitefiles/file/guzim.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/161352286155d9---bobugazepogipawule.pdfIn PDF document text
    • https://fajndoktor.cz/images/file/files/xobuguwozusipixuduxes.pdfIn PDF document text
    • https://thietkeweblongan.com/upload/files/jatoserakedafa.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/161394fa4d2472---bareranososibe.pdfIn PDF document text
    • http://thenext.pk/userfiles/files/ladofud.pdfIn PDF document text
    • http://parilka.by/var/upload/file/dakazizenozejexelikep.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/b272045f7f5450011a1c10a939728f35/11230026553.pdfIn PDF document text
    • https://www.agencesramos.com/ckfinder/userfiles/files/37069144626.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/25401160277.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog/file/lokobebuse.pdfIn PDF document text
    • https://armenia4d.com/contents/files/30193825080.pdfIn PDF document text
    • https://laptopserwis.com/app/webroot/media/files/lexiwebusimadi.pdfIn PDF document text
    • https://wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/firiludexisebekav.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/68526552017.pdfIn PDF document text
    • https://tsegypt.com/file/97123585650.pdfIn PDF document text
    • https://tp-pos.com/uploads/image/files/36006240706.pdfIn PDF document text
    • http://onlinetalk.jp/app/webroot/img/fckfiles/file/21635756464.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/buzikafilisuxexoxegugejif.pdfIn PDF document text
    • http://7166867.ru/ckfinder/userfiles/files/kiginorafujafaxugevux.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/1a55497ffdc51e577d5828cb56b302ae/lixebabenadunozolalifup.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16134f8903cf58---40986210690.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/kotetotinolenewukofo.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/vigatixigalugaged.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=petta+movie+download+in+tamilrockersPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6F4 10776 bytes
SHA-256: e6170ff970266932a1b2af287855d997d1778034206ee0f81e82ac4193ed26c6
font_01_sfnt_off0000cfcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFCF 16600 bytes
SHA-256: 0dcedc4ff6d6849ee7463528a5cfc012434823856b1c6329c3a3bd5cf5ffd084