Malicious PDF — malware analysis report

Static analysis result for SHA-256 863aadda9320c2d4…

MALICIOUS

PDF

72.6 KB Created: 2021-09-28 08:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 30ff28be135113e052b561b578fdd1d6 SHA-1: 001be5c5b9891af9b923848c4b8552c7c76fb35c SHA-256: 863aadda9320c2d425c1f8bb7fb092c35d738ed82d0676c2040719a6481f25df
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to distribute malicious content. The URLs indicate a pattern of hosting PDF files that likely serve as lures for further downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://e-motorcycle.tw/upload/emotorcycle/files/7013788011.pdf In PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161523e1b94c07---bipepomowigugonalovakeno.pdfIn PDF document text
    • https://mauspro.net/upload/files/27591014299.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136e7a3078a3---zuwitexivaxeserugi.pdfIn PDF document text
    • http://skyrybupaslaugos.lt/uploads/files/fevesevu.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/74210676103.pdfIn PDF document text
    • http://brlairport.com/images/file/93345500757.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16151253b95782---89434601604.pdfIn PDF document text
    • http://rucodelniza.ru/userfiles/file/27690737776.pdfIn PDF document text
    • https://livbiopharma.com/userfiles/file/mezupoduledi.pdfIn PDF document text
    • https://vasutaszeneiskola.hu/ckfinder/userfiles/files/11243919646.pdfIn PDF document text
    • https://bozoklar.org/ckfinder/userfiles/files/8119969087.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/6g9e6qvdg2ee8gcppelmjjgto4/puwunomutetu.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16135812a0ffbc---rofopoxivos.pdfIn PDF document text
    • http://salukool.ee/upload/userfiles/file/xenut.pdfIn PDF document text
    • https://electroagro.es/pub/files/koxuxazesegubur.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/borurudowu.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613de46f4cf7d---74740455249.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/tonepogaf.pdfIn PDF document text
    • https://simorgh.it/uploads/file/gifut.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/zurazot.pdfIn PDF document text
    • http://tuecpa.com/file_media/file_image/file/19767442836.pdfIn PDF document text
    • http://hosungtour.net/FileData/ckfinder/files/20210905_5BE9C88B00300D90.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=samsung+galaxy+theme+store+apk+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_off0000b37a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB37A 11316 bytes
SHA-256: b99073ed888c674021c6d324268808595b6447a322080e749ffeb1705d9b9d45
font_01_sfnt_off0000cdc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC5 17780 bytes
SHA-256: b591f31b66bf7a070d9d2afbc935d23a795ebe82d7924379fd1c492bcff39a1d
font_02_sfnt_off0000facb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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