Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd90d009e6268029…

MALICIOUS

PDF

74.9 KB Created: 2021-04-30 05:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 78edac83dea1fe70f09528070fc5ff21 SHA-1: ab707ff9cd81c72a44b9496a0fd22e6debe6a80b SHA-256: cd90d009e6268029d6fab3a378d6ceeb6b6c21b0816980ae8314e7d11c0c4ac6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. The ClamAV detection as 'Pdf.Phishing.Trojan' further confirms its malicious nature, likely serving as a lure for phishing attacks or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8924

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 http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607b74c6c940a---zeselajomuf.pdf In PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608350b5f2ca5---lawirovaxotebu.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/7d4635867b970cf837c8e55ea883fbcb/79099461346.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607b31af29f15---kuvud.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca019bb5aa---bositotixawadox.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/86b44ed6dbde4379e362a62579891738/83955143089.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6358e14f0---gubexot.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/4b5cdc8f68799984dd02edacd34a68ef/falot.pdfIn PDF document text
    • http://amandamaitland.com/images/file/1957250266.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/8a3fe551bfc11bd36fc831c312758334/jakafeva.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/b18953786c195b74fed8168b45ba32a0/zopamotiwawetadowodepimad.pdfIn PDF document text
    • http://allnatureint.com/userfiles/file/87219784072.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/vhv17hfvccg6j6m9nrs811oh9a/bopizelanularebivokonel.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160726e257c039---63460745093.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/9d09137042b790642f96c829e59d8408/wejov.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607891fc98247---wuxaw.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c67380c51d---lodojujesudevoxesebugeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=conservatism+accounting+guidelinePDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001081d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081D 5224 bytes
SHA-256: 1168d52283cf2626abd7fe921148c4ec6819d590491938bfa2fed511ac14e006

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