Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fdee213d6944cee…

MALICIOUS

PDF

86.5 KB Created: 2021-09-07 15:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 59240b80245ffe3ee6c5fe44f0d98d03 SHA-1: 6222cab11f3d3ee86a41d9947a6b11a87f4a9175 SHA-256: 0fdee213d6944cee2d9705983ffdc04b75e57893435f3c7db8545cec595e0f0b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of multiple compromised CMS upload links further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097c9052915e---58856639937.pdf In PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/926005939717c1738cbdb85a54739ad8/getodefuzigegowekag.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/19316997740.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611cb86dded3f---xuvami.pdfIn PDF document text
    • https://didacostruzioni.it/userfiles/file/metufefevinedifimab.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/gisibuxewumofep.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/1be6ab2a8c8a2f62cfde7bd54bf1e718/82096535106.pdfIn PDF document text
    • https://nevisnews.com/userfiles/27903854366.pdfIn PDF document text
    • https://eliteplacementagency.com/uploads/files/72712728132.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a2751794234---20899023087.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160971b2071694---76216349238.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/81088167818.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/6a99b0bad5bd3f4dfbd1180944054623/fekoretoluvijoxalabiva.pdfIn PDF document text
    • https://agrocare.ro/ckfinder/userfiles/files/tuzunowelelevogar.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-16/20210516232026279218.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/73142481974.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/7bf22bedcb74d1a256d608ad32063bc8/pikafajeg.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/23884871263.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076f9a8d4e98---pivesumekewotinava.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/tiberus.pdfIn PDF document text
    • https://aquarell.ro/userfiles/file/gekogorirajidaduvutefa.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/xuxebab.pdfIn PDF document text
    • http://unseretochter.com/images/file/4920744470.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=aplicaciones+de+la+funcion+cuadratica+en+la+vida+cotidiana+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_off0000e727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE727 10760 bytes
SHA-256: f8d96ea03f8b02378580b0a47c26a5b822f5d4666c03d90d820e67e0b052181b
font_01_sfnt_off0001001c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001C 20548 bytes
SHA-256: e9e399e3b44ba2f8eedc84ba176a84b4069c6556e5c0196ba19f6449c2b9a752
font_02_sfnt_off00013429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13429 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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