Malicious PDF — malware analysis report

Static analysis result for SHA-256 fefb964752f5b19e…

MALICIOUS

PDF

78.1 KB Created: 2021-09-18 02:08:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f62d9f25ed31b170be3205410bbec8ea SHA-1: e62585b31833fb2a2d18bca7272db539239e2626 SHA-256: fefb964752f5b19eb8abe8bb91fcc2161997e519e77fcf5601159fb06068c71a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting it's designed to redirect users to malicious sites. While no scripts were explicitly extracted, the nature of the links and the PDF structure imply potential for JavaScript execution or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://petpetmates.com/files/editor/file/rexabufuvakos.pdf In PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d58ea6ae44---10571923894.pdfIn PDF document text
    • http://avandcie-energy.com/ckfinder/userfiles/files/49144792096.pdfIn PDF document text
    • http://astmasme.com/userData/board/file/55693172097.pdfIn PDF document text
    • https://paardenwelzijnscheck.nl/app/webroot/files/ckeditor_files/files/tederakag.pdfIn PDF document text
    • http://diadiemvui.com/upload/files/jibakufi.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/41758106934.pdfIn PDF document text
    • https://htlexpress.com/ckfinder/userfiles/files/26701628106.pdfIn PDF document text
    • https://optimuselearningschool.aels.edu/learning/site/images/uploadfiles/44730048268.pdfIn PDF document text
    • http://nonstopsushi.com/uploads/files/pezodifomikubodofiwi.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/soxunoloditowomat.pdfIn PDF document text
    • http://warwick-ems.org/userfiles/file/zatamobigulub.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/589312597.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/555d25961024751c04601f103bcc827d/xijupef.pdfIn PDF document text
    • https://robodom.si/files_vsebine/sexubilat.pdfIn PDF document text
    • http://ilink.pl/userfiles/file/23266262958.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613810442931f---32658735926.pdfIn PDF document text
    • https://tanhaithanhvalves.com/quangcao/admin/file/16989060752.pdfIn PDF document text
    • http://rimini-portal.de/bilderarchiv/file/gozilerasukagaj.pdfIn PDF document text
    • http://stefanourso.com/public/userfiles/file/74907457332.pdfIn PDF document text
    • http://manenshop.com/upload/files/jetonumudatudadizirigebo.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/70386816501.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=gta+san+andreas+new+modsPDF link annotation
    • http://irodori.kir.jp/files/file/22416183149.pdfIn PDF document text
    • 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_off0000ccea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCEA 18184 bytes
SHA-256: 45dae40b069c1fc1d9995af4f13123a4ac95ee1e6ad4baf466c6668f54ddbd18
font_01_sfnt_off0000fb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB83 10396 bytes
SHA-256: 6b57d502c4249bec8be70b53e9a40a762bef79ae310814f2e497871dea6057ef
font_02_sfnt_off00011323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11323 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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