Malicious PDF — malware analysis report

Static analysis result for SHA-256 432fdbf377652995…

MALICIOUS

PDF

69.5 KB Created: 2021-06-01 14:53:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28a380f279d7e73a8449eadcd781627f SHA-1: 664078a0f9d4f592634736a9f667702a89d66756 SHA-256: 432fdbf37765299535d1d493f425d38c010278ceb63a35d9ea35513dff92c00d
154 Risk Score

Malware Insights

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

The PDF contains a link farm hosted on compromised CMS upload directories, suggesting an attempt to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution scheme, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8302

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://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16083b54109fe4---74743961230.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a63a283b191---35496893998.pdf
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/10038ffd2b20839aeb0e6d3bc17dfcd9/vivawibababagis.pdf
    • https://xo-sound.ru/userfiles/file/44271016073.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607be52910e98---jebenotufetomef.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/427fa41ac51d3845d6ea1b3880f5bee9/sojarazilisodegexiz.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608ded49b5e9a---65722495699.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160942114816f1---49706600470.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb1d026055---sifoxukopexu.pdf
    • https://aashianarealty.com/file/namipegibikojokowez.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a45e170237---jusodufolutupepemobafi.pdf
    • http://ldbell1965.net/clients/85689/File/11756835715.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0f05281ff---bezuwobopanigujo.pdf
    • http://allycatering.com/userfiles/82922395105.pdf
    • https://dimensioninteractive.com/WYSIWYGImage/file/70669109213.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/f62d2d11f2af8fcaa747825bb98ccca1/49483071142.pdf
    • http://www.pzkexie.com/up_files/file/zijepasaz.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b046baa2369---josivipuxajakizolitofaj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=king+kong+skull+island+full+movie+in+hindi+download+720p+filmyzilla
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000febc.bin
1d03411ae733ffa168ffcac7bed750c938ac69142ae3491085fb0247bb72c4e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBC 6048 bytes

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