Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c97540a68fff54d…

MALICIOUS

PDF

49.8 KB Created: 2021-09-11 09:43:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 0289cb035b4fdd63912fb6fe91e31dba SHA-1: 7c8b62c63a91b80133f1422ee5b30ac30eea693c SHA-256: 6c97540a68fff54debb1013332d2ed4b122ebbc35c986e65a82917cfe8e5dc0e
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8745

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 https://fereshtegan.net/basefile/fereshtegannet/files/85699798698.pdf In PDF document text
    • http://bradzo-ep.com/uploads/files/pepibofolakivexipofajux.pdfIn PDF document text
    • http://eschool365.in/js/admin/uploadfiles/file/kutaritedezifobefov.pdfIn PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/4858026001.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613724bd4ce8c---detim.pdfIn PDF document text
    • http://argyleliquidations.com/userfiles/files/lawajapojitanure.pdfIn PDF document text
    • https://clubkdo.fr/img/pics/files/23886744889.pdfIn PDF document text
    • http://pp-aqua.com/userfiles/files/838168378.pdfIn PDF document text
    • http://ih-consultant.com/ckfinder/userfiles/files/nibunirevinuse.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/lodis.pdfIn PDF document text
    • http://arrhythmiaclinic.com/userfiles/file/20210909032724.pdfIn PDF document text
    • http://markjfox.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/42920224783.pdfIn PDF document text
    • https://doitoutdoorz.com/file/FrDWnAMUqhrf3VqL.pdfIn PDF document text
    • https://andhimazhai.com/images/files/jigubufoseralopod.pdfIn PDF document text
    • http://www.uc-kushiro.net/images/library/File/95626024432.pdfIn PDF document text
    • https://eghamatsafar.ir/basefile/eghamatsafar/files/77566334804.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/5kggheuoinr3vcebjs21tq41od/jakusidox.pdfIn PDF document text
    • http://rvhifi.cz/files/file/1919976478.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/rutowipodalibute.pdfIn PDF document text
    • http://huyndaicaudien.com/upload/files/tiforere.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/25406612975.pdfIn PDF document text
    • http://www.addvanceo.info/userfiles/files/2277721330.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+play+games+from+your+phone+to+your+computerPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB36C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1