Malicious PDF — malware analysis report

Static analysis result for SHA-256 676202ecc13bdb1b…

MALICIOUS

PDF

72.0 KB Created: 2021-09-06 01:59:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 319de31b735a130e8e03e003821303a9 SHA-1: b1d2f4df25289f9c5cdb0f18625d2c05fea0de30 SHA-256: 676202ecc13bdb1b69791e8a2caf28d243b69b3bc9df380f9ca238697968c7a9
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to disposable or compromised hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' suggests links hosted on compromised WordPress sites. The embedded JavaScript and the nature of the links suggest an attempt to redirect users to malicious or deceptive content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8648

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://ctyrkolky-gamax.cz/data/dokumenty/vumiwonavunu.pdf In PDF document text
    • http://soft-pro.hr/upload/datoteke/nukozomorutuverolosurajo.pdfIn PDF document text
    • https://mvmdigital.gr/files/files/18830302076.pdfIn PDF document text
    • http://palaciodelosnavas.com/userfiles/file/89626567817.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/fokegatiz.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/b2e6e5797ccba87f07f7eda38434b0d8/12567971798.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/kezuvoni.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/tolepalujadofeti.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c0da449afde33e566bd4a660e8a49949/wakabizupuzokojajoz.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/damirofedix.pdfIn PDF document text
    • http://camwater.org/media/files/zudemigavukilozuvexuj.pdfIn PDF document text
    • https://florerialafloresta.com/ckfinder/userfiles/files/jobam.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160f90a66981fc---87984924146.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2a6455080---56235191662.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/tukam.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/3d9p7eufi8i75sg1p8cnfink4b/62818136068.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/c1f2ddbee6822a95d7b6ede25614bafb/lujutavofujuxagotitipim.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16091f4e907a44---97837688752.pdfIn PDF document text
    • http://joyandwowbook.com/upload/file/peloxotukivepotul.pdfIn PDF document text
    • https://landbar.com/app/webroot/js/ckfinder/core/connector/upload/files/momoz.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160970667a59f5---fagewefagute.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b3907cb7f---mololu.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16081f0be89caf---63633817029.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608200dd3dc44---17663002457.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=global+environmental+issues+book+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9E 18176 bytes
SHA-256: 24d2839ad9c6e2eabc3a43ba2cbefef41e9c942cac2cf1b56b31e85a6546c887
font_01_sfnt_off00010a99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1