Malicious PDF — malware analysis report

Static analysis result for SHA-256 2edd786ebb60a641…

MALICIOUS

PDF

94.3 KB Created: 2021-09-06 09:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f9bf9952109b6a0bb5582a515ec02985 SHA-1: 902f75707bcd55e931ecfd84ebd3cf20cc8e1583 SHA-256: 2edd786ebb60a641db36a96f76174b05d89d1e98c6a9f38f4faec4d1535feb99
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to potentially compromised websites, suggesting a phishing or malware distribution scheme. The presence of a link farm on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://mientaytourist.com/uploads/files/medozumimataremitozatinux.pdf In PDF document text
    • http://4bx.pl/public/file/gegagiki.pdfIn PDF document text
    • http://caythuocdangian.net/images/files/1759557929.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7a9343923---27266845852.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/98442427796.pdfIn PDF document text
    • http://silmalogistics.com/sitename/app/webroot/uploads/ckuploads/files/fetewuve.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/f55c90ef338b9648a054ce5415beac91/tizuputuxomonasa.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/b38a13fcd6e323e48564c4be6fa978a9/37723629650.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/xalofumijekaditusigoduko.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/30be2e0d3ea10868378a3dea63745419/domalidaxaxivobovarizamar.pdfIn PDF document text
    • http://bjbtrh.com/files/pic/file/79870760762.pdfIn PDF document text
    • https://camphacement.vn/upload/files/24638034756.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/jd2nq562chdnm22mohnudagb1c/pawonosuw.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160a056ba67da5---jomebafagowewosutorer.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/bac2559b80329461da40619ad240dec2/xarufaginoledalelufos.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/mipinanixub.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609915283b748---56489016974.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/le4q0q488pgu0oftacfd5l6io2/16619724998.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=electrical+bushing+pdfPDF link annotation
    • http://cluster006.ovh.net/~greeters/be/ckfinder/userfiles/files/dukexomanajikemekujagav.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_off00010d06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D06 17684 bytes
SHA-256: f4de980078be4d4e9e4661d00f3686910730f0d04ad1bd9c86fcae3fffc85a01
font_01_sfnt_off00013add.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ADD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000152f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152F4 11000 bytes
SHA-256: 6a08978eb3f114e87fe08c805b8803f1759bea249434b5d44c0c9a48a965d722