Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eedcccf7032da90…

MALICIOUS

PDF

85.6 KB Created: 2021-09-07 17:19:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5808ef26e409176140afd6636fbaa14f SHA-1: 2e5223ae69a311f0a84ad5eee32b55bf7eb13355 SHA-256: 3eedcccf7032da906b1cfd5f267b98262477b8dd15ff5371918624e00b621922
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the heuristic findings and URL analysis are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • 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
  • 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://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d531e15b341---72882581276.pdf In PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085c1331003d---10522558495.pdfIn PDF document text
    • http://cloverdiamond.com/file/bapazibosinapezixiref.pdfIn PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/56793806762.pdfIn PDF document text
    • https://arerp.kr/data/file///tasixa.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/8c8cff95c8d15de86f3cf92575722f30/funevapuwokozavalumuxit.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/98837915026.pdfIn PDF document text
    • http://predit.ru/admin/ckfinder/userfiles/files/gamurigorilazibaxenoli.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c812f5a73d---vuguvebikixuwalanewinize.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b26c0538588---47991367385.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/derefav.pdfIn PDF document text
    • http://abnicum.ru/files/file/34310681992.pdfIn PDF document text
    • http://crm333.com/documentos/file/rapax.pdfIn PDF document text
    • http://micdelhi.in/userfiles/file/tafevomomijawupizuwijon.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/sscgeo2ja99epvlresp3o9fnl3/6872627511.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/vizakuditovud.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/d08cce5ba029d31870cb92f0c9f9be52/suwonaxelabid.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/cbea4ba5ab93e771331cb70f97b191b0/viduwafiwelol.pdfIn PDF document text
    • https://vongtaytramhuong.vn/upload/files/43818041223.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/b7ccu81rqs41p0mdh70blmldmm/sekovonarabixu.pdfIn PDF document text
    • https://evpersoneli.net/ev-personeli/file/gevawezonesajizu.pdfIn PDF document text
    • http://alfadent-volg.ru/images_uploads/files/ginabizavufajojelewipon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=athens+vs+sparta+worksheet+pdfPDF 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_off0000e798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE798 10680 bytes
SHA-256: df69a466d01282b0d1acd8211bcc76db3b7ba225919de8745cd2abccd88e30e8
font_01_sfnt_off00010024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10024 18804 bytes
SHA-256: 1ece9baa92a93f0fff05ed7cf1c7a7f3d76a00ce6db256cb461d7f246a572a21
font_02_sfnt_off000130c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1