Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c02f1ec09269e3f…

MALICIOUS

PDF

85.8 KB Created: 2021-09-23 03:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: d9fcbd5c0f7edffa321bc616d27f6009 SHA-1: e65fa119b80babd5c19fa5da14c171cc5e352621 SHA-256: 4c02f1ec09269e3fd4602699e4a241ab3732f5b51715f8b1a176b9f8bbf4d588
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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://espressobuilders.com/app/webroot/files/userfiles/files/11737235572.pdf In PDF document text
    • http://abwplazaview.com/uploads/files/kulolurugo.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/mibur.pdfIn PDF document text
    • https://kemxoithanhhang.vn/app/webroot/files/images/pages/files/81316912067.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/37412869038.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143a735d73d3---doradawaluwoj.pdfIn PDF document text
    • https://maritime-models.com/userfiles/file/ximenetavuragoxi.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/161489b257b3f0---rosixezaponufoxudu.pdfIn PDF document text
    • http://kemmurad.com/webroot/img/files/pideguwuwaxaxonijole.pdfIn PDF document text
    • http://dzirerealtors.com/uploads/veramebaj.pdfIn PDF document text
    • http://noithatmfc.com/media/ftp/file/54903881874.pdfIn PDF document text
    • http://himalayakebab.irafbrothers.com/shipinc/userfiles/files/92521634270.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/9052f5ca40811800fca3a1c145ecd47c/77445342625.pdfIn PDF document text
    • http://mamaskitchenorder.com/uploads/files/71750950468.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/87703422870.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/28ec750b7ecfaea8a8166b83699b22da/guperoduzabemorixu.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/36371854487.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/99203968578.pdfIn PDF document text
    • http://theeultimatenetworker.com/ckfinder/userfiles/files/satakiwamodipasoga.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140f06f3efba---zadurifolatubonopoguz.pdfIn PDF document text
    • http://newworldss.com/uploads/file/fuziwetosaxotutiseta.pdfIn PDF document text
    • https://maintogelonline2.org/contents/files/libabumojujenar.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/kubolujubikafixamatol.pdfIn PDF document text
    • https://graveyards-fuj.ae/userfiles/files/gafuweleliko.pdfIn PDF document text
    • http://joyerialaplaza.com/ckfinder/userfiles/files/bamekigiwixatiliso.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16145d35f16c32---36483316248.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/1bc0a4664f35cf46531af82fb64cb7c9/78180933256.pdfIn PDF document text
    • http://www.huntsvillepr.com/files/files/xuwiziletikewiwigebiba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=kingroot+5.1+1+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_off0000ed9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9E 17032 bytes
SHA-256: 64af771ca8feede1f60601707e74b92ed8573a490194642959815414ea1eef06
font_01_sfnt_off000119b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B6 10452 bytes
SHA-256: 5073fb686b75df2ed916854d7278c5fe87fa02338218bf9db13feb0bbdca1ee7
font_02_sfnt_off0001316b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1