Malicious PDF — malware analysis report

Static analysis result for SHA-256 483f62cfd48f223c…

MALICIOUS

PDF

72.8 KB Created: 2021-09-15 23:34:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1e307ff4eb8f3f580e60eaae0b258969 SHA-1: f57a143fb7aaaf4e0a4466d53e48b550c9870e09 SHA-256: 483f62cfd48f223c6230b885a11d066b6966ddf3bea1973ff5466e94388a44f4
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of multiple external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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 https://horkolas-gatlas.hu/ufiles/file/guxewavivakejobefimas.pdf In PDF document text
    • https://standsimulator.com/ckfinder/userfiles/files/gagebeduje.pdfIn PDF document text
    • https://indikino.com/ckfinder/userfiles/files/suzijidoginepotakimi.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613100fa1aa01---90224008711.pdfIn PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/72160815665.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/15269382048.pdfIn PDF document text
    • http://kondicionery-shodnya.ru/upload_picture/file/mibepirijurusubivumorel.pdfIn PDF document text
    • https://truckforceone.com/upload/editor/file/5500016693.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/e1e61265f9dffdeb9cda918730d61657/rakiwuvedanezolol.pdfIn PDF document text
    • https://qfuse.it/images/uploaded_files/ckfinder/files/1630648885_c2b6c30901.pdfIn PDF document text
    • https://repairbase.net/FCKeditor/editor/filemanager/connectors/php/images/file/45833623665.pdfIn PDF document text
    • http://luxlustry.ru/img/upload/22929605543.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc6e3843a9---ridijazejutafebadaguwogob.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/396a6fd800f221f7db9bfa1b40d2728e/19569493155.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/didisipimagufamubog.pdfIn PDF document text
    • http://sungwoo-n.com/userfiles/file/pokimikinuku.pdfIn PDF document text
    • http://tecniagua.es/uploads/ckfinder/files/61993900612.pdfIn PDF document text
    • https://ottopianos.nl/files/ripatodupuxid.pdfIn PDF document text
    • https://almentispharma.com/ckfinder/userfiles/files/pafulofosizuno.pdfIn PDF document text
    • https://cpsguffanti.com/uploads/file/44123774393.pdfIn PDF document text
    • http://sanzmendia.com/userfiles/files/fibapo.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/47438307015.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/06773fbb92cf9bf2688430055b46e6d5/jekesubulilezixadex.pdfIn PDF document text
    • http://pegasomeeting.medcoast.net/ckfinder/userfiles/files/4108306413.pdfIn PDF document text
    • https://ecoolteh.eu/galeria/file/wofelef.pdfIn PDF document text
    • http://solarwindependence.com/ckfinder/userfiles/files/mifitutunesamofefesufe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=phone+keeps+shutting+downPDF 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_off0000bc09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC09 10644 bytes
SHA-256: 2bde0b4a327ce44eeba408adb454067455d65e2670a21dda7932889c7543104a
font_01_sfnt_off0000d430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD430 16056 bytes
SHA-256: 3120c6e9099deca5038b4749ffc5648c6760adec309b0328ab8e832aaa321849
font_02_sfnt_off0000fd60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1