Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fe9cbef0275ed03…

MALICIOUS

PDF

68.5 KB Created: 2021-10-01 11:00:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: d49a505148087d27396365a60527c182 SHA-1: 6fea9a3bf87fac37a1abdba68a17ce4606e29f8e SHA-256: 5fe9cbef0275ed038c52cb0f1e7d8ad3b1163e0ba075ef8490c600ef0d364b68
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous external URIs pointing to compromised websites and link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of JavaScript suggests an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=naruto+akatsuki+ppsspp PDF link annotation
    • http://zhengfutz.com/v15/Upload/file/2021921950374196.pdfIn PDF document text
    • http://sanzmendia.com/userfiles/files/92370950273.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/448de7de2bb07c8c6bdf9fada1b5aa99/53693625923.pdfIn PDF document text
    • http://scouttautomotive.com/editor_uploads/system/files/fivavazoxetuxir.pdfIn PDF document text
    • http://leguido.net/files/zenefi.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/wekobinukaxupiragis.pdfIn PDF document text
    • http://www.skk.com.hk/admin/ckfinder/userfiles/files/76796843786.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/fefulojevul.pdfIn PDF document text
    • https://inprovitpuertorico.com/ckfinder/userfiles/files/wizazalujojuvajo.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/63664171944.pdfIn PDF document text
    • http://wasserentkalkung.at/ckfinder/userfiles/files/1996406824.pdfIn PDF document text
    • http://whatdwellswithin.com/file/19792739694.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/24073827253.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143a59e9ba45---51232987285.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/divetiporowegatopum.pdfIn PDF document text
    • http://leadingedgecorporate.com/user_images/file/xifubefejowuwavolof.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/161382f54b35b0---5240632195.pdfIn PDF document text
    • https://5a.ro/ckfinder/userfiles/files/wutixe.pdfIn PDF document text
    • http://indcms.testingmachines.com/images/file/rirerikinazolumowukuj.pdfIn PDF document text
    • https://arabadvertise.com/userfiles/files/97650937693.pdfIn PDF document text
    • http://keacg.com/upload/files/23013127531.pdfIn PDF document text
    • http://maezawa-jidousha.com/js/upload/files/26629958428.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/files/files/lakawugakum.pdfIn PDF document text
    • 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_off0000ae0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE0B 10132 bytes
SHA-256: b94c6bcd1722b421d7228955b3a6da82c5c9bebad0f881d989abbbef6bd708fe
font_01_sfnt_off0000c4da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4DA 16004 bytes
SHA-256: 66eb41477e25e5bf9f1f4fe0f2f30aaf8b82f6f7bb4ce0fab3c2a4269068a1c5
font_02_sfnt_off0000ecd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1