Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c83c7ff4a6e5ac7…

MALICIOUS

PDF

83.4 KB Created: 2021-09-24 01:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9eb6eb7ad15ea59b6b4f4722310df7e6 SHA-1: 6287452452252948b4c9bcc79bbc641cd841d23c SHA-256: 6c83c7ff4a6e5ac72aed0b19d579821e1229de235732587f423e66bbdb88bd22
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with one identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://maintogelonline.info/contents/files/44848922657.pdf In PDF document text
    • https://tapetcenter.ro/app/webroot/files/userfiles/files/85283879016.pdfIn PDF document text
    • http://graylegalservices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/16870324541.pdfIn PDF document text
    • http://martonaroniskola.net/userfiles/file/24228002057.pdfIn PDF document text
    • http://kelvista.lt/images/files/kasulilibesuwelebipelizuw.pdfIn PDF document text
    • http://abcbyspu.com/ckfinder/images_store/files/10649215143.pdfIn PDF document text
    • https://granitabrasive.com/editor_up/17072578535.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/161319a420948f---segop.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/55928767089.pdfIn PDF document text
    • https://mbamantra.com/ci/userfiles/files/63519321227.pdfIn PDF document text
    • http://dostavkaturov.ru/files/file/zulukidatam.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/060133582765.pdfIn PDF document text
    • http://patroha.hu/file/pilox.pdfIn PDF document text
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/10877956536.pdfIn PDF document text
    • http://i-p-p-c.com/ckfinder/userfiles/files/powupitogulefegap.pdfIn PDF document text
    • http://snp-ent.com/files/fckeditor/file/7326406856149b96c6fde9.pdfIn PDF document text
    • https://history.tlshaa.org.tw/ckfinder/userfiles/files/27111976878.pdfIn PDF document text
    • http://elitsatodorova.com/uploadfiles/file/tejanafel.pdfIn PDF document text
    • http://eaas-journal.org/survey/userfiles/files/81133241966.pdfIn PDF document text
    • https://chezgregoire.fr/userfiles/xetidilawukefedugiw.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/guledobitodemuxevedozu.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/lolozagovufenusu.pdfIn PDF document text
    • http://didula.ru/img/file/16115815347.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=grand+theft+auto+san+andreas+in+androidPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC03 10544 bytes
SHA-256: 8a80bc2ce3f963834367fec0ef28ac956d7600b014628607bb933a767d8e4f4d
font_02_sfnt_off000113fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113FD 17348 bytes
SHA-256: fcd177198e16b05c6ef17e922f292f34676524743c3296f6aa427726d59f7f58

Open this report in the interactive analyzer, or submit your own file for analysis.