Malicious PDF — malware analysis report

Static analysis result for SHA-256 02eb32490152561c…

MALICIOUS

PDF

83.2 KB Created: 2021-09-04 07:36:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 3a7e71652df2689c06fdd3641817f39b SHA-1: 6aae5cd16be1c2592099eb5ddddf96fa722df796 SHA-256: 02eb32490152561c4e9cc86202b6f6697d50c70ea422f0507bf726640e02a446
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. It contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure the true destination. No scripts were extracted, but the overall structure points to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://premiumcsp.com/uploads/files/26816587954.pdf In PDF document text
    • http://freetourscadiz.com//ckfinder/userfiles/files/71729015050.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/fuzomekevem.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b870947de---81297126656.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/n3c68a2ca1gap860647uos134m/fuxorelomozamakox.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/443a3b9b3251567df17f52c56621279f/22045552502.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/02a9f1d0b90d721b9e0ef42a33548499/84383406416.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c837d4a457---wegefuzixevojufopuko.pdfIn PDF document text
    • http://ladakhtripmaker.com/userfiles/files/28053497772.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c877b22e97c---lusijatovo.pdfIn PDF document text
    • http://babyindex.nl/images/uploads/takevasulekimonikozokuzez.pdfIn PDF document text
    • http://www.syrahresources.com.au/application/third_party/ckfinder/userfiles/files/sotezut.pdfIn PDF document text
    • http://nceed.kr/pds/userfiles/files/gerakisolulumuwazowipofob.pdfIn PDF document text
    • https://www.singaporemedicalclinic.com/ckfinder/userfiles/files/10516509560.pdfIn PDF document text
    • https://pharmnet.cz/ckfiles/files/files/kikitipatomuxejir.pdfIn PDF document text
    • http://acquadiqualita.it/ckfinder/userfiles/files/tiresixogiwog.pdfIn PDF document text
    • http://rexant.by/upload/editor/files/50087211390.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/990cb5196a062cd227b4c63989113ead/96808247287.pdfIn PDF document text
    • http://maihome.hu/admin1/file/14585603760.pdfIn PDF document text
    • http://geodeslaboratori.eu/userfiles/files/resesitefuxemigazunoze.pdfIn PDF document text
    • https://taxiparga.com/wp-content/plugins/super-forms/uploads/php/files/dc95d6b7ae4e5ffadafaf3fc58087e7e/49099621135.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/9970799064.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/73330954916.pdfIn PDF document text
    • https://zoldlepes.hu/userfiles/file/kuzeruforeso.pdfIn PDF document text
    • http://packturf.fr/files/dixutugikifujaxaxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=interlineal+hebreo+espa%C3%B1ol+pdf+gratisPDF 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_off0000dc30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF447 11072 bytes
SHA-256: f2712b8a6ad5956d77b0d2f9efef490013a34814d8ee6899c3eba4f98419178b
font_02_sfnt_off00010d44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D44 18524 bytes
SHA-256: d3dc5d7ddac32fe46020be58e5e093795275ae167b356daf57b995884ba40615

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