Malicious PDF — malware analysis report

Static analysis result for SHA-256 24eb859875e25eba…

MALICIOUS

PDF

84.9 KB Created: 2021-09-06 07:33:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a5b8218caa999765dd27845d95f5cefa SHA-1: 000f8aea22ea8a8a122e9ab660d74e89c65facb9 SHA-256: 24eb859875e25eba9911b08da8960b95db77bebae0eed0a232fbb37d2b8680f4
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 and an ML classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to multiple compromised websites, suggesting an attempt to redirect users to malicious content. The presence of numerous external URIs and link farms indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://northjerseyseniormenssoftballleague.com/clients/2/22/22e10641a135963e7b476298ec508c3c/File/wadarilafeno.pdf In PDF document text
    • https://ceccarbotosani.ro/userfiles/file/vexukizepumukowe.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b55b8a17046---roxinaler.pdfIn PDF document text
    • http://grafosaleservice.cz/images/fck_editor/file/91074554856.pdfIn PDF document text
    • http://siembra.me/uploads/files/nokifalop.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/78053b051d01c864568afc69a966cdd9/65295212267.pdfIn PDF document text
    • http://ruresept.ru/files/file/pokenuvagasal.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/l429524lsi0b1gcdbbkdmlhost/28251654845.pdfIn PDF document text
    • http://pogologistics.com/ckfinder/userfiles/files/tusarotumij.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086c69b23615---tovovabufivutesigolabab.pdfIn PDF document text
    • https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/vupomarigelakew.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/rarigimimego.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/970661a691c2b7702c2b98958f9f17f8/zuloxo.pdfIn PDF document text
    • http://sumtinathholidays.com/admin/uploadfiles/file/64370927601.pdfIn PDF document text
    • http://csptech.net/admin/userfiles/file/danafulepupepepup.pdfIn PDF document text
    • http://techbis.pl/files/file/pojetaluxolokez.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/8tbvojr2i2v6lqapiajs2n9ai6/83754647738.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/7pl4tf5701jcelrl57cc6esit6/11427401482.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/70phb3atodn2emevin948cnmk5/rikuwuzagibopulire.pdfIn PDF document text
    • https://circolodelpistone.ch/userfiles/file/46293596238.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/jekukovonuvum.pdfIn PDF document text
    • https://himarco.ir/basefile/himarcoir/files/pekeximafomaloxafera.pdfIn PDF document text
    • http://universalthailand.com/images/uploads/ckfinder/files/51202905063.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=fifa+world+cup+2018+match+list+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_off0000e467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE467 17852 bytes
SHA-256: 3b5d540e12d8e7cd822709e1a7c0ffb482a9d0797db04c31bb5bca601f327ea7
font_01_sfnt_off000112f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F8 11316 bytes
SHA-256: 8ccc32951087456776c6f09063470289d8c286ce32ea0d31ff02085ea5ef7d65
font_02_sfnt_off00012db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1