Malicious PDF — malware analysis report

Static analysis result for SHA-256 758677a15ce1cb67…

MALICIOUS

PDF

219.8 KB Created: 2021-06-19 03:47:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 95d73b47feb76d7e08ad90ec130bfc36 SHA-1: 1d88599cceee6e17de8dce9ded50ce80d2599dc1 SHA-256: 758677a15ce1cb679498ec479b1d896b57363ffcc7b0bf89a5fb56a422f6edac
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple links pointing to compromised WordPress sites, suggesting an attempt to host and distribute malicious files. The heuristic 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly indicates this malicious intent. The embedded JavaScript is likely used to facilitate the download or execution of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/4jv648vqum4amppaa8qk852jrf/volijemofanasefumosezagut.pdf In PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b42ff433bc---23684311942.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/nkhp44li957sg9q2llebb6ice0/lasowakoramo.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1608e26d4699d9---nasilixikul.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e678743a53---gulajuzajavafefigimipiguv.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/41827188124.pdfIn PDF document text
    • http://musclecar-taps.com/js/upload/files/kurad.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb054c9b5e---dotogewolesusida.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/du4d49au012hmtapd1lnfletvm/tesasotomujefari.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0d4ac7e58---15895215743.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/44511320894.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b441e715d77---rotefitabi.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/jilaro.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/51c54025827687de49c9c97cf928e46f/69814788143.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ac01b881aac---53165271750.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa58528e81---88302549733.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=forge+of+empires+botPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00031781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31781 4756 bytes
SHA-256: 9379c5476fb610ae34e59e85e285dcbff75c059999261eadd7c5c7684c8aac3d
font_01_sfnt_off000327b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x327B5 13152 bytes
SHA-256: 62517d3a004c7d7b71e77e2caadfb96b3017d237f04d242d3d99109a1d01ad3c
font_02_sfnt_off00035294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35294 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230