Malicious PDF — malware analysis report

Static analysis result for SHA-256 362fd4a9aed80589…

MALICIOUS

PDF

84.3 KB Created: 2021-09-04 17:29:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3f4e3eb40e7cd8d77d7dc7f036539829 SHA-1: ffe8eeedb4c43efd4d2fc50f0b419fd81fb5409b SHA-256: 362fd4a9aed8058976637adda811ee56fdf238d9d7a6ff3dd6d71017143b2185
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains JavaScript actions and a high number of embedded URLs, many of which point to compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of JavaScript suggests an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://dlzhrjd.com/images/uploadfile/files/butab.pdf In PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160effd0164d65---19098936470.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9429e08df---nuwumexosul.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/34443775587.pdfIn PDF document text
    • http://maurovalleferroarchitetto.eu/userfiles/files/zenexefozejevokuzomogiviv.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/fe5d369f7358541568fa343423ea4b31/4029607269.pdfIn PDF document text
    • http://workcoop.org/fckeditor/userimages/file/20210601062633.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/gedajugo.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/c5520d1c7c39ab9da3940e6fe5f72f8a/kufezalisanejisofux.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/sivaton.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/3574499247.pdfIn PDF document text
    • http://dafangtour.com/fckeditor/userimages/file/gutun.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/mebiposu.pdfIn PDF document text
    • http://mxm-hosting.nl/img/editor/file/3681277209.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/pemakogige.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/fezopet.pdfIn PDF document text
    • http://from.ua/upload/articles/2021/06/16/files/pazigajinogi.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/5578156149.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/3b2caco123ipuh2ieig5fkadb4/36663664108.pdfIn PDF document text
    • https://churchofgodinjamaica.org/app/webroot/files/diwaxoxekeruvel.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/79707003787.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/pizetarirosezijuvi.pdfIn PDF document text
    • http://bowlingkillers.com/imgdb/files/18696767020.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611cdb2160220---95590074993.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=stationery+business+profile+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_off0000e32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32D 18004 bytes
SHA-256: be68caad5554819aae7e9fc784d66f1e9cead2c2c3f43630c3e6396ca3b99d74
font_01_sfnt_off000111ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111EF 10920 bytes
SHA-256: 345acf3305ecf8783407be8126501aa98e8c7ea65f6d08c07c4feea5ef8abbde
font_02_sfnt_off00012b25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1