Malicious PDF — malware analysis report

Static analysis result for SHA-256 44ebd2ae88d462a7…

MALICIOUS

PDF

70.3 KB Created: 2021-09-10 13:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9e24cad8bb030d44d457f2f7a31d70d3 SHA-1: a8d7cd727b6527853e34b2b9c4d4bed75af75f6a SHA-256: 44ebd2ae88d462a72caa9bbacd6aab94b6cc22fb651b31801f4441e63b0b8279
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6717

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://alconsprom.ru/ckfinder/userfiles/files/bixivapedobudade.pdf In PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/bajalozidutopuwog.pdfIn PDF document text
    • http://thefarmatarapahoecounty.com/userimages/vuwizu.pdfIn PDF document text
    • http://koddous.com/userfiles/file/mumegokonugeputavonamo.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16131436ae58d7---71660317808.pdfIn PDF document text
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/72119120293.pdfIn PDF document text
    • https://nepalonlineexam.tisaracademy.com/userfiles/files/42486361780.pdfIn PDF document text
    • https://degardo.hollandpazsit.hu/ckfinder/userfiles/files/95296442087.pdfIn PDF document text
    • http://thaymanhinhlaptop.com/userfiles/file/wanisidavetijuru.pdfIn PDF document text
    • http://plnjl.com/userfiles/files/penepexozupodizi.pdfIn PDF document text
    • http://media-production.net/admin/ckfinder/userfiles/files/litado.pdfIn PDF document text
    • http://venkateshservices.com/uploads/53510649338.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f41239ed65---37829821583.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16137edaa492e9---muzaponibiravexudaligerak.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/iuhinm0cl6qtucki2p97com7oe/82785008133.pdfIn PDF document text
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/xiginoni.pdfIn PDF document text
    • http://fpole.ru/sadm_files/76141442837.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/wexilidisuxetaxekogikod.pdfIn PDF document text
    • http://babijie.com/upload_fck/file/2021-9-8/20210908010217969486.pdfIn PDF document text
    • http://hzqljsj.com/images/upload/File/tusovipojorosijikajot.pdfIn PDF document text
    • https://thaiwoodengames.com/files/upload/files/85717376029.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/xararilebugeta.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/kaxel.pdfIn PDF document text
    • https://postele-z-masivu.sk/ckfinder/userfiles/files/24397545124.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=transferir+contactos+android+a+iosPDF 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_off0000dde3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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