Malicious PDF — malware analysis report

Static analysis result for SHA-256 732f41b32be3ce51…

MALICIOUS

PDF

88.1 KB Created: 2021-09-15 14:20:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 47cbcc02530758217d854aaed5999681 SHA-1: e1e9116e53684af901a562639a1b62a88cc0925a SHA-256: 732f41b32be3ce5168b916b6bdf30bfaee4c3cde1758aac960e3a1d6e54a7ed0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. It also features a link farm pointing to multiple distinct hosts, some of which are identified as compromised WordPress upload storage. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/58818807427.pdf In PDF document text
    • http://garagehayashi.com/js/upload/files/95030572660.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/6ba8c27ecc05ac27a4068aab8fbb6456/85301539452.pdfIn PDF document text
    • https://27061010.com/uploads/files/202109020351162074.pdfIn PDF document text
    • http://assytekservizi.com/userfiles/files/buvigitasul.pdfIn PDF document text
    • http://idroter.org/userfiles/files/vazeke.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a3febaf3d4---50094420567.pdfIn PDF document text
    • https://wanfutemple.urwaydesign.com/data/file/userfiles/files/69179698407.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161382ed521d09---35438739155.pdfIn PDF document text
    • http://vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/desozukamimo.pdfIn PDF document text
    • https://webaprint.be/img/file/bebuzowi.pdfIn PDF document text
    • https://comillaspostgrado.es/userfiles/file/19588080200.pdfIn PDF document text
    • https://12shio3.com/contents/files/68257485690.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/60814064048.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613f84fed645e---46557599225.pdfIn PDF document text
    • http://hzdsbg.cn/uploadfile/1631164408.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/60555463105.pdfIn PDF document text
    • http://purplebyanki-com.bvirani.com/ckfinder/userfiles/files/65492677845.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/juvefezonefopanurafa.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/161395404406c3---sosodidedogik.pdfIn PDF document text
    • https://12shio1.com/contents/files/ruxivuxeku.pdfIn PDF document text
    • http://dblbtech.com/userfiles/file/ribur.pdfIn PDF document text
    • https://delaneyllc.com/ckfinder/userfiles/files/51094264591.pdfIn PDF document text
    • http://stin-verdon.fr/assets/Image/files/pubufazejupuloxuje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=toca+life+world+1.29PDF 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A5 22208 bytes
SHA-256: 5592fc533b89334ca979d78fdb757ee23e8be4a2f404740eeb64aa6da247d4bb
font_01_sfnt_off0001226a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1226A 10552 bytes
SHA-256: 782d973be57aab709e9597e697c09cf1007b1970d35388984479d31c78153c93
font_02_sfnt_off00013ac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1