Malicious PDF — malware analysis report

Static analysis result for SHA-256 623023443f386c5f…

MALICIOUS

PDF

82.0 KB Created: 2021-09-02 23:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 493ec70364fc6b2b20da4cb8ff8baa72 SHA-1: b22f8d096546c7684d50c3fca12226be38b36681 SHA-256: 623023443f386c5feea4dab785597bc24285ac5945b77ad173be1dd21a416649
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous compromised websites, suggesting an attempt to redirect users to malicious content. The presence of external URI indicators and compromised CMS upload links further supports its role as a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a1801397f---ferolulukinijinexekeruj.pdf In PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/v5eht4ioklee4dhn2r6c9gif4u/69124196028.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/dususelidad.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610e0b55b829a---29264261903.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/43341417897.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/34c6f538817294fd626e5236a448d563/4064434901.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/mutulabasovezapomekami.pdfIn PDF document text
    • http://www.santabriganti.org/admin/ckfinder/userfiles/files/66912130546.pdfIn PDF document text
    • https://pmfegypt.com/userfiles/files/tilekumevajajokerabeda.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087e1bf72ffe---53886996622.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a19af0c1b4b---72878974737.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1612eece438051---29887219178.pdfIn PDF document text
    • http://abwlargo.com/uploads/files/lofavopeguzigitatimizomos.pdfIn PDF document text
    • http://sylvianapoles.com/clients/e/e6/e63d90d46a840f0b3195f531cec11f6e/File/41872812453.pdfIn PDF document text
    • http://transgusto.ch/userfiles/file/jegetubafizevixuzo.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4aed6ae699---46545937345.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/vejufuzotatopukefiwe.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad42d87064a---tojobupolibaji.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/3bv64akcjblfrbs2ml1vauqk6d/xeratorobebiwi.pdfIn PDF document text
    • http://mishor-uvk.com/uploads/files/39044668999.pdfIn PDF document text
    • https://havadisname.com/upload/ckfinder/files/xapuxifelakesezisel.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/fa55hb8ofatcain3muer3q34jl/fizebevixupowenin.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083d49f52f2d---lazamosod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=surah+ad+duha+pdf+downloadPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/d1f547eb20127e9d4a9088eb649ab501/zojuguxurujoxupo.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_off0000db36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB36 18428 bytes
SHA-256: 786eba2faf2f1748c5fd8251d48d61816b1f2e93efe697420e62283fea086cd1
font_01_sfnt_off00010ada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F1 10368 bytes
SHA-256: 225f1865f4764920fcbaec7fab723a1d03cce25d7828a287234922560aaf7cab

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