Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ba895bdc478bc7d…

MALICIOUS

PDF

80.4 KB Created: 2021-07-17 11:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c11c65f9535fcfb682445fe836bc4acd SHA-1: 06c3d0cc68816bbb1c5aaa6238291e7b0b622abb SHA-256: 9ba895bdc478bc7d29c566a748c246ad37475a8009c87d6bb26d2fbd512a3af3
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm for phishing or malware distribution. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. While no scripts were explicitly extracted, the nature of the links and the heuristic firings indicate a likely attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

Heuristics 5

  • 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.
  • 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://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16080d71c25860---45213371958.pdf In PDF document text
    • https://audit-advisers.com/userfiles/file/xewimefusorutoj.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/f21ae41948d88a4e6638ffeaa694a49c/mekipir.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5362a4c16---gifefomunepa.pdfIn PDF document text
    • https://bioesteticaonline.it/file/vegijefejexedetijazesugu.pdfIn PDF document text
    • http://kleiberit.ru/files/file/zapekimenepasoninupi.pdfIn PDF document text
    • http://vogiantinhmach.com/media/ftp/file/22807118593.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/081863e860429872de9d0783b193ce61/tamid.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160a1504524e6a---tabunusefesid.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/550421b531689de312dc4a7def996a03/satodidetanavopipitoxe.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/79vdgnqfcjnhmu9phujd8diqsk/66800012933.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eea14b657a---jaloloxikovafaginazovumun.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/zopibezebeguxakula.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/8gnp89supj1eg4gg2bodg9c1nq/51497591689.pdfIn PDF document text
    • http://folientastaturen.pl/_data/file/61180764015.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/90ac534333efae79fcd72cf23bf04128/kubenowimejaxodibul.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/447023ec2f55ca2fff9fa1e3751621a3/xumitusopali.pdfIn PDF document text
    • http://come2menorca.com/images/file/dozoregapanujetowaja.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/1f40e052a954502f2c067308c9bfe779/zerudaxegofubaz.pdfIn PDF document text
    • http://k-yoga.org/file_upload/spaw_upload/file/20210515092323.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/78349692376.pdfIn PDF document text
    • http://sl1971.com/clients/5/51/517263f0417f9379c67e6eba0e0bdfe8/File/sazazevukezilapudeva.pdfIn PDF document text
    • http://mirai-kankyo.com/userfiles/files/gurikuli.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/32765463698.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/5f830267a61a1d5cc51d950026ef8e8a/xavagemosoti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=word+and+excel+to+pdf+converter+free+downloadPDF 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_off0000f326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF326 17112 bytes
SHA-256: 4dff6b0fd13464ac0e461b545c4d4bcc63e51c79b5adeb46ae604a6473822678
font_01_sfnt_off00011fe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE7 10600 bytes
SHA-256: b5c1e961593405523bfb280e1c4e651d191d223f2e25ff818773a3bb90eb23b2