Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8c317c5d65983bc…

MALICIOUS

PDF

85.3 KB Created: 2021-09-05 13:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bfe69fee9d726f9da438bd58c1108cf0 SHA-1: 56a1bb923450f7a8c787229386a50778109df222 SHA-256: a8c317c5d65983bcb38a090dc3f532627a7ee1d7f9a57a388d92d2f857943505
154 Risk Score

Malware Insights

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

The file is detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to potentially compromised WordPress sites and disposable hosting, likely intended to lure users to malicious content. The PDF's structure and embedded links suggest it's part of a phishing campaign, possibly delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6240

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://pixomot.ru/uplcv?utm_term=iccpr+and+icescr+pdf PDF link annotation
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/f1a42c5eb881381de622bce81a0edaf6/tebikoxozuma.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/14247514824.pdfIn PDF document text
    • http://393citizen.com/upload/files/69032038645.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609c96a4c2818---lotamox.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/4c9200620d5b2ba6a9bb3b7b0f102d6b/rizodadenofu.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/6l0qabe7sbehim29svob86uhm5/jerifubuwopore.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/87764af0f92e033ed25e83c4ee2e35ac/luxosebe.pdfIn PDF document text
    • http://alituncer.net/userfiles/file/54307852701.pdfIn PDF document text
    • https://aspit.ro/imagini_ws/wudakejawotarenubeg.pdfIn PDF document text
    • http://kazuma.ru/ckfinder/userfiles/files/zudisixusag.pdfIn PDF document text
    • http://teraval.cz/res/file/difokijawaxexifafasebasa.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16070953da9960---72968414224.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/1ddda39f03243356dbfec2440c646311/90384749531.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/da8obmj29fge6n7a7g78ckf0ch/lujunemudopar.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/faroduge.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/88c3495b3f069804217bdc2628a8638c/78969844546.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/6b530487e67a700df70f6752cd645a09/valigozulovuzatoronejajuv.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/amskiouqop3ro47att3ptu8sdt/rikoramutuduwe.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/6cc3b301f08f62a6871adea077c2c6bf/mojeburek.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610edbe850282---parafaket.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc8c665b61---12533722400.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/foxagu.pdfIn PDF document text
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/9982806091.pdfIn PDF document text
    • 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_off0001251b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1251B 19876 bytes
SHA-256: eb37b38ca72bd17492b87082b6063d2aec967de7979b6ec5cba7d1eda6360813

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