Malicious PDF — malware analysis report

Static analysis result for SHA-256 db25fe49272b47ce…

MALICIOUS

PDF

70.1 KB Created: 2021-08-30 03:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ca9255751e461970c419f70db7a2d8ce SHA-1: d033a41654f8b7b8edabe3129f4390d9d206429a SHA-256: db25fe49272b47ce1de07732d6fedb1ec00ff761ba489df78a1da4f23f9eac6d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, directing users to numerous URLs hosted on compromised CMS uploads, indicating a phishing or malware distribution attempt. The presence of many distinct hosts and the use of 'utm_term' parameters suggest an effort to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bfr-bialapodlaska.pl/userfiles/file/82794403752.pdf In PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610446b05f106---47630472413.pdfIn PDF document text
    • http://nutricion-intravenosa.com/wp-content/plugins/super-forms/uploads/php/files/87ddb0baea6e8c986674047fea93a025/5805994142.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160a00514067c6---visamodubojinifag.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/161188719e48b9---mebonaxazedogon.pdfIn PDF document text
    • https://dcimx.com/files/95799122665.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/b8t2anr01e60lhs6rhjsjgsjjr/kadesotepafebutupekefu.pdfIn PDF document text
    • http://hwayoung.kr/upfile/files/gevurabifuditibuto.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a85752587---15828232376.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/161027c84c36e3---gosatomipadagogivu.pdfIn PDF document text
    • http://abpaluso.com/upload/file/masugagegokagubefu.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160845fb68a219---fifipimab.pdfIn PDF document text
    • https://sealordhotels.com/ckfinder/userfiles/files/89996345691.pdfIn PDF document text
    • http://quick-thailand.com/images/uploads/file/86346478412.pdfIn PDF document text
    • https://msvadba.ru/files/file/vipagamiz.pdfIn PDF document text
    • https://highrise.pl/file/lokabojupizaremi.pdfIn PDF document text
    • https://actor-conseil.com/files/file/19589960000.pdfIn PDF document text
    • https://jesssmithtri.com/jesssmith/ckfinder/userfiles/files/megedopekuxenori.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf2bb0570c---95550213176.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/dfp9nh3tce1n4ldbr1oq5378u0/pugabalatibukilakesumiv.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/kv2ef5r285jlthm2vesjggjmh5/49077014534.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=hunter+thermostat+44550+manualPDF 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_off0000b5dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cdee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDEE 14596 bytes
SHA-256: f7e40fcba5da09f4384e19e127e167d5d2750fcf78212d591a1875f0ae8c96d8
font_02_sfnt_off0000f231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF231 10704 bytes
SHA-256: dc2c3d637a4682000d6a9d776f215ce3f2d0a5a3abbd619374f0973458ce70e3

Open this report in the interactive analyzer, or submit your own file for analysis.