Malicious PDF — malware analysis report

Static analysis result for SHA-256 04e5244df9f02bfa…

MALICIOUS

PDF

74.2 KB Created: 2021-06-28 17:46:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 41b1ce188eb097207701eafeb6950f8f SHA-1: c26697e1e907536bd45244d1cde0bee37c4733ee SHA-256: 04e5244df9f02bfa65a836ef5b7e6221ec1e08cba7b5698c1823278a7b464db7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, many pointing to websites hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://catamma.ru/uplcv?utm_term=open+the+face
    • http://adabaskimerkezi.com/upload/file/wosevibekapubukugenuf.pdf
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/c26e0f3a75a19386a9566d670292668b/99528271558.pdf
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/147ccb8b1be34156c7bb8200c0460133/fileredujuvakotafipede.pdf
    • http://azizolace.cz/images/file/fumobov.pdf
    • http://mmdplus.com/userfiles/files/20210613_155857.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609787b476891---lefazozukegifi.pdf
    • http://enjoy.sk/editor_uploads/system/files/7839178596.pdf
    • https://planet-for-events.de/userfiles/file/pezalazerelozonupibejaxav.pdf
    • http://nature-revive.org/files/file/likavusijolexibu.pdf
    • http://munnarinfo.in/userfiles/file/36694994138.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077cbe619733---62343675489.pdf
    • https://aawyx.com/sites/default/imageuser/file/72893879170.pdf
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/645f09293fff493d70fde33bfd0e6cec/29722233221.pdf
    • https://1877painters.com/FCKeditor/file/butelexapiwawikugixelaf.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/091f2b793d810d1975fca78ff4262f7c/zufot.pdf
    • https://almondzwealth.com/administrator/imagetemp/file/zabinepumiwotegijozadude.pdf
    • https://muzeumkonstancina.pl/attachments/file/jewid.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/u7cml8g3rn78vftkt3qm98nf70/nonawokofexisozopatosajeg.pdf
    • https://ahha.az/userfiles/file/72070403980.pdf
    • http://sva-jeanroze.com/xmedia/file/35994325217.pdf
    • https://didacostruzioni.it/userfiles/file/pebumebew.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b269fb00274---potonit.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3ea.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC3EA 16792 bytes
font_01_sfnt_off0000dc01.bin
fd9d393e8a3133112587a2a1933082e0a75a3debfe36a0dd9eb52f7ebc43a7aa
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC01 10076 bytes
font_02_sfnt_off0000f26d.bin
5d213128e01ac74a68fc3e1d4037d1df71e967e08989a01e2e9e17a57371e51d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF26D 16260 bytes