Malicious PDF — malware analysis report

Static analysis result for SHA-256 2504f0e7ae75ae47…

MALICIOUS

PDF

82.9 KB Created: 2021-09-02 12:22:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c2caa8871a89d7227356e09745b3ea14 SHA-1: 745940124624eb3963cc6abc5062a400d2f1bd10 SHA-256: 2504f0e7ae75ae47f206559198218b630433545f4c3406ae040dc866b0a0d614
164 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL analysis point to a common tactic of using link farms to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://eagleegg5k.com/ckfinder/triplebuserfiles/file/naluzuwise.pdf In PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/bea4a93f2810e4026ff5bbcf2d83ea70/782759489.pdfIn PDF document text
    • http://pmrs.ps/userfiles/file/nulipajala.pdfIn PDF document text
    • http://mariangelesorrico.com/galeria/files/72238675413.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3d2e707571---nidujolinegexopag.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/34842353041.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee02e7f3ed---65590751364.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/kiwus.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/suzapexobotepajukariki.pdfIn PDF document text
    • http://bulmarconsult.com/files/62428509822.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ccef8aa5a32---pifagajipafidesefifok.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/915bc6249cf893ecb9d80a11699ab91e/waxudodipuwuzagawozala.pdfIn PDF document text
    • http://cukiernia.eu/upload/files/6613986111.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c77ca309225---30098346605.pdfIn PDF document text
    • http://mingzhicc.com/userfiles/files/zanupafujopanufotovobo.pdfIn PDF document text
    • http://charivne.info/images/file/filituvosajovuruwatawur.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/rimegubosirekifaz.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba9febd1f64---68196506305.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d424025d7e---51067008033.pdfIn PDF document text
    • http://dorapeyzaj.com/userfiles/file/kuluxepubafu.pdfIn PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/80455962470.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100b65883601---teputulemajawap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=tet+paper+1+answer+key+2019+pdf+downloadPDF 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_off0000dc1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1D 17940 bytes
SHA-256: d8aa6b79a0466de98c285cae8070b1e1e3f603d99cdec0bb8461c1362e19a1bb
font_01_sfnt_off00010a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001226d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1226D 11116 bytes
SHA-256: 00f76021ef2612f010ab232ad4e22cfd72207f7bd828d125028f47da4149bf57

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