Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a7630f87388902…

MALICIOUS

PDF

78.1 KB Created: 2021-08-02 14:41:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: b59cadff6c18f38f409d0f845979d23e SHA-1: c4ffaf9fe160c3267b90cbdb068eb3df8e05a65c SHA-256: 70a7630f87388902aeb1c38aa29d96d521bbd572da54dcef65f0ff42111f84a5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were directly extracted, the structure and URL patterns are consistent with phishing or malware delivery lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6118

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://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/o23jbf5k2b14elm6fukn55ar8r/vurubi.pdf In PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/dcgjl9njffvvqtihvjbl6br3n1/86055365049.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16075274e468e4---1590587880.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/6a90eebcbb5f4c4d881171aa9ec64967/76323769637.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/c6c77523e15cb9b59e9705752b0d7342/15991800286.pdfIn PDF document text
    • http://hzdsbg.com/uploadfile/1621103349.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/63191627651.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/c3fe105feea252e4fc05e2165937e5ef/75273689298.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d62f3f3d5bb---jodudorenanojisiwajaveg.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e112c945a---67134800868.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/6bab749bc2d873fdc691a6563396c5ca/mexomelizuwijikopo.pdfIn PDF document text
    • https://ourlady-schools2.com/userfiles/files/49631063349.pdfIn PDF document text
    • https://latework.cz/soubory/kegasose.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/1312b6cab0e28a0cae67e9f103177a5b/lefexigedopigotilenavun.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a56eecb7adb---zunumufilitinefiwa.pdfIn PDF document text
    • http://wuxihemei.com/ckfinder/userfiles/files/20210621_014237.pdfIn PDF document text
    • http://brukbet.com/user_images/file/xuvupopali.pdfIn PDF document text
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jagunubifezasuneb.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a48af5dfebf---36072110240.pdfIn PDF document text
    • https://doxity.ro/ckfinder/userfiles/files/16786993015.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160913de77ea5d---8596749392.pdfIn PDF document text
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/72510659739.pdfIn PDF document text
    • http://yeosingol.com/FileData/ckfinder/files/20210712_25F3156A38AB05FF.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/97903597021.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/nelepuwezuxiz.pdfIn PDF document text
    • http://www.mmalappeenranta.com/tiedostot/files/tovimod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=ap+us+history+declaration+of+independence+worksheetPDF 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_off00011631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11631 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1