Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9a6c6d9869b5340…

MALICIOUS

PDF

70.0 KB Created: 2021-09-02 17:34:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bbca5f07179d378fbf30022c16b789e3 SHA-1: 7815fc934facdb90cb97c17ec9eb8aee4b3cf518 SHA-256: d9a6c6d9869b534085a6241d7332c1bb6fe073b11777de20f4e551a858fc0a48
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or potentially disposable hosting. The ClamAV detection and ML classifier indicate malicious content, and the heuristic firings specifically highlight the link farm nature of the PDF. The presence of multiple external URIs and links to compromised CMS uploads suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6630

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://wastran.ru/uplcv?utm_term=certified+six+sigma+green+belt+question+bank+pdf PDF link annotation
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/mskp26up0pje2jokv1pablk000/58502460736.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e248333bd---86345224955.pdfIn PDF document text
    • https://emons-verlag.com/testarea/cwsCMSlight/media/files/30218458853.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6b72481609---43437126452.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/9edaa8c99ee5d313372d704acd692bb7/76934345349.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608e175c7685d---95216126328.pdfPDF link annotation
    • http://dogable.de/userfiles/file/31553907119.pdfIn PDF document text
    • https://paroles-vives.com/ckfinder/userfiles/files/71840944549.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/31301994545.pdfIn PDF document text
    • https://igescanada.com/ckfinder/userfiles/files/27708293357.pdfIn PDF document text
    • http://burragebrothers.org/demo/jolie/beta/userfiles/files/lurewa.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/1d05872d45b37c4f467b386441031d1e/71186195300.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/19676720941.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16110f1dbe0e44---lazititidutupatodawasudaz.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b08ced2e18---tixixazizimamusuzinokutaw.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16083e2a496a24---pemilixagevopav.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/soputejukidenidokeritun.pdfIn PDF document text
    • http://anpo.vn/upload/files/tozokoriwegolokawolumax.pdfIn PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/74652910399.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/f83bc9ac2be8fdc065d2f029d52706c1/xutiwuj.pdfIn PDF document text
    • http://xn--h1aaebbkfib4a.xn--p1ai/sadm_files/49575239951.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16076cc24dfe7f---befofewofulositeno.pdfIn PDF document text
    • https://gute-reise.ru/i/files/files/46200586608.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/6e41b3e477cee671fafd24c466937105/63591783514.pdfIn PDF document text
    • http://restorationteleconference.com/clients/73716/File/9826373646.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_off0000dab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB5 11452 bytes
SHA-256: 3625677a73051d8d2a1b4df5dec9c2f3195253bdaea840ca79373e3aedffd104