Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9d3cedf5140106a…

MALICIOUS

PDF

63.6 KB Created: 2021-07-22 05:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5418011ffe6afe8d34570f257892d308 SHA-1: 6df5af2fbab4f0e944818e1e54b40b65d9900b08 SHA-256: a9d3cedf5140106a759651a399b55c331d2bf35eb517c95b73d13c2ce7715b4c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the links and the PDF structure align with common techniques for redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9138

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 https://booknowrentalimo.ch/userfiles/files/gitebajokevoru.pdf
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/960b70c3bcc8f17ed1e92b141338ed8d/pupozoponajut.pdf
    • https://baigiangtoanhoc.com/upload/files/ravikibatotut.pdf
    • http://app8itebarandgrill.com/admin/images/file/donivurudekasikagaf.pdf
    • https://almoheetmanpower.com/public_html/userfiles/file/11205380564.pdf
    • http://ettermanenterprises.com/ckfinder/userfiles/files/31472422659.pdf
    • http://unnatiwelfareorganization.com/ckfinder/userfiles/files/27735739753.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/ccab5dcd1dbcf36ae54ae09bac814c0b/36554203319.pdf
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/c1mjnvl5c5dl4jm1pukicpagu1/46363739389.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/d9v52dj18mbr7c1v0b7lsr3ihd/77006964405.pdf
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdb8fc2cb7---sadajazumope.pdf
    • https://chameleoncoupons.com/adgprocessing/uploads/files/lowoxuvakajoropawexafes.pdf
    • http://www.deep2001.com/images/library/File/55895464948.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/5fb5442909b3ae45741ba6b4250b05e3/84600218360.pdf
    • https://yptea.com/data/fckeditor/files/bajewedujavoxijedafinon.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160efe12f45cb9---bifuzexiravotis.pdf
    • http://carrozzeriabosini.net/userfiles/files/85789324641.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0e56c82f0---sedaxajutobiruwawofo.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ad5a2d0ec---84179851392.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/d52a57744d8435311061f4e92de4f81e/67449693816.pdf
    • http://dunajecbiala.pl/upload/File/wofenutojavofeti.pdf
    • https://affordans.com/ckfinder/userfiles/files/gavezuvil.pdf
    • https://airshow-bg.com/file/xikupagokuxaretiti.pdf
    • https://e-uchebnici.com/img/file/pawuvi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+play+split+screen+zombies+on+black+ops+3+offline+xbox+one

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