Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ee59ed540038a06…

MALICIOUS

PDF

104.0 KB Created: 2021-09-07 22:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7ea6774df9bf061d7dfbaf686f7e0000 SHA-1: a7f2aa3a3a3d9526a42deb856cc51a5be7f13133 SHA-256: 9ee59ed540038a06882d279981ea5ee30880102ff2376dd26e24c2e1710821ee
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of embedded URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to lure victims to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://archism.ru/uplcv?utm_term=theory+of+reasoned+action+and+planned+behavior+pdf PDF link annotation
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160911aa913454---15391065690.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/44220166761.pdfIn PDF document text
    • https://funbugs.ie/userfiles/file/28879242200.pdfIn PDF document text
    • http://morgancountyoh.com/userimages/26360814469.pdfIn PDF document text
    • http://boracayg.com/FileData/ckfinder/files/20210808_A4F6F6E7F50363F6.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f105aa2157---mukixubopirujapiwav.pdfPDF link annotation
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/42f6aa7787bf8ae74ef8663a24c7d7d1/81807184356.pdfIn PDF document text
    • http://hondasushi.com/uploads/files/zizabekaderadimijejotodi.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/44fa3a7fcc8c847017477b495cadc7e3/98516353541.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/dadonajemitowibufegamalir.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c145a60043a---90753671621.pdfIn PDF document text
    • http://dorapeyzaj.com/userfiles/file/32343795209.pdfIn PDF document text
    • http://dogable.de/userfiles/file/vulilux.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/1c0144821a67d11f477c088d086db3b3/70751440354.pdfIn PDF document text
    • http://veoguidecostarica.com/ci/userfiles/files/24108377133.pdfIn PDF document text
    • https://aiwatopup.com/ckfinder/userfiles/files/24397695128.pdfIn PDF document text
    • https://nullemont.fr/nullemont/ckfinder/userfiles/files/tisogexotibumalam.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/127d683c9832347ec9ad2ca70a9f0dce/82797738716.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/mipiseb.pdfIn PDF document text
    • https://olterus.info/contents/files/42978151257.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078cd5c5f2e3---77575969315.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/30af43a90991d93ebc9d0150eb7f8d4c/nitevufikanenomuba.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_off00012e7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E7C 19220 bytes
SHA-256: 7a307214ec1641ea86bf4958ad4be84211e0ee06cf5979024c7d86568e014fc1
font_01_sfnt_off00016087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16087 11000 bytes
SHA-256: b473fe9c77ac8d68853c0911d53743e9d86a9315d88778176ff61ab2e9383fd0
font_02_sfnt_off000179d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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