Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c0d9a10354ceace…

MALICIOUS

PDF

73.2 KB Created: 2021-09-04 09:37:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 56269848cb589078004a068581ea2410 SHA-1: 5227cdc5b490c663a1939fb2007847892d2fd05f SHA-256: 4c0d9a10354ceace62370780447241263d3ed0502b30dec27a09b59400fd0829
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to obscure the ultimate destination. While no scripts were directly extracted, the PDF structure and heuristic firings indicate it's designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://suksesunited.com/contents//files/17770611532.pdf In PDF document text
    • http://bright-mineral.com/uploadfile/file/2021061520210114.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/ek2lac4kgsls7facfgl8bticca/43201102324.pdfIn PDF document text
    • https://butterfly-propertymanagement.com/userfiles/file/xikirawij.pdfIn PDF document text
    • http://rosniyom.com/userfiles/files/rasabukogunebuzewofubumi.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/67a004da857536a6ad7744f1d21230ed/jelotimasefanak.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607c03441b451---20853093284.pdfIn PDF document text
    • https://bestcaps99.com/ckfinder/userfiles/files/15211112993.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/5096064258.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/98c1996243578845ac8ec7dbde828386/95587960762.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ca4d1f69d---46595843327.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/xeviwugazar.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed920c871b---betenozetageb.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/4jo1u9iups0houg2oejt3m8u1c/pizoduxaroripeb.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/4092202241.pdfIn PDF document text
    • https://fiscalonline.ro/app/webroot/files/userfiles/files/pudijoxinolutukigenikonox.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///fiwivix.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1608038107e690---90000185691.pdfIn PDF document text
    • https://magyar-logyogyasz.hu/fileok/file/buroxiselikevil.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/vscon0jjgiirf6lvbsigld3k6o/netudibaribij.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/9ktpitpnkrpj5dj2q2mfmvqggj/96042924315.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/76701796768.pdfIn PDF document text
    • https://rockyhotelsgroup.com/uploaded/files/63764882297.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=electrotechnics+n6+study+guide+pdfPDF 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_off0000ba62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA62 16488 bytes
SHA-256: 70ba07c77315ec329fdbcb21efc981ba384fcca7e1e4bea3ca89dd7baec703db
font_01_sfnt_off0000e530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE530 11104 bytes
SHA-256: b694e56949518dee5f81adf33366681233e8b10d0dab4251308f6d9785d5d202
font_02_sfnt_off0000fed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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