Malicious PDF — malware analysis report

Static analysis result for SHA-256 5142d7a7efaa0cd3…

MALICIOUS

PDF

69.3 KB Created: 2021-09-13 15:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: bd04b42d31c29463ee1065104b116c43 SHA-1: 9e6a2e2b366ee7d4009793c068cdeae48e398f62 SHA-256: 5142d7a7efaa0cd35da71226f004cbdc8df72dad239de9cf8f6c6797d16832b1
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple URLs, including a link farm pointing to compromised WordPress upload storage. ClamAV detected this as Pdf.Phishing.Trojan, and ML classification strongly indicated maliciousness. The embedded JavaScript and link farm suggest an attempt to redirect the user to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9130

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 http://camelliafb.com/uploads/files/202109021322317332.pdf In PDF document text
    • https://asken.as/bilder/file/65815041582.pdfIn PDF document text
    • https://atkarisuli.hu/userfiles/file/39958302879.pdfIn PDF document text
    • http://archiw.gbpopatowiec.pl/img/upload/files/67586441490.pdfIn PDF document text
    • https://cakenflowersonline.com/userfiles/file/wojusidaribazo.pdfIn PDF document text
    • http://smogy.ru/files/files/josujox.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/90334731985.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16134649cb3a15---97421636060.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613bbf18f1dc1---70754109898.pdfIn PDF document text
    • https://nuttydog.hu/ckfinder/userfiles/files/kawusukizitif.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16136c5cd03699---rijutu.pdfIn PDF document text
    • http://expresskaliski.info/file/70093723318.pdfIn PDF document text
    • http://www.sas.edu.mn/ckfinder/userfiles/files/pekinovujotabafupefovobow.pdfIn PDF document text
    • http://shamayachts.com/upload/file/13408931296.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/6e4bd2191b3475b151691706feca8b23/35319957393.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/161314256412b7---kogujerawomevite.pdfIn PDF document text
    • http://sincaremedicaltour.com/js/upload/60218357443.pdfIn PDF document text
    • https://majubesar.org/contents/files/89513255526.pdfIn PDF document text
    • http://coolscape.info/images/files/18700698025.pdfIn PDF document text
    • https://mintowncoffee.net/uploads/images/files/23824272992.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613573cf03aed---gofatopekokonumosepobu.pdfIn PDF document text
    • http://freeorden.com/media/file/dogonuvugoxija.pdfIn PDF document text
    • http://szwygs.com/upload/40009048349.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/17217874339.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=watch+live+football+online+free+appPDF 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_off0000de1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1A 17588 bytes
SHA-256: 8506429a0092760faf97e9218c00ec45f4a6e495b9dfd79572ef70a30252320a

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