Malicious PDF — malware analysis report

Static analysis result for SHA-256 a302b43706256a29…

MALICIOUS

PDF

159.9 KB Created: 2021-09-06 04:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7012fa33e9a4a887c433332176fff704 SHA-1: 71b32c886e9b9a1e460c007d6c713def012df6d0 SHA-256: a302b43706256a2960c970e783be899bf1e1f6cf6c9fecabb5731665fe691afb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress uploads or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9903

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://jatyn.cn/upfiles/202105/file/1620289336.pdf In PDF document text
    • http://kuppersbusch.hu/userfiles/files/jowakitin.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/74974953038.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/jupojiseguxuposetedaginu.pdfIn PDF document text
    • https://avistravel.ro/userfiles/file/woxapum.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/vilipa.pdfIn PDF document text
    • http://palazzodiaz.com/userfiles/files/3499998280.pdfIn PDF document text
    • http://hefei.chinatupai.com/web/js/ckfinder/userfiles/files/tajadifipixukepijib.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/a4tsmraebtd9sv3uirons1u0bq/46073325748.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097ddf076389---60082782118.pdfIn PDF document text
    • http://fisioterapiasuzzara.it/userfiles/files/nojonek.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/fvk0eh08soc1tllmvcbabvnfc3/lusimimedovolijitiderixid.pdfIn PDF document text
    • http://cozycornerexpress.com/uploads/files/48411779749.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/25193678632.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/nisinakuwezomipudakop.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160efd2396ab14---62436050346.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/14317049163.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cccbdee661---botur.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076fc397fbe6---pilotesuponapedizudedanew.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/6adc43cf4a081855a34087639dbfa5d9/xawaxefopani.pdfIn PDF document text
    • http://kiszelyugyvediiroda.hu/docs/file/26273890008.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/kolazabazaxofuxadexomeril.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/29858323319.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce0cb9dd42---17230309447.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/8ckqeev0on4ata26o5vdr17erj/24509165700.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=particle+model+of+solids+liquids+and+gases+worksheetPDF 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_off00021060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21060 11348 bytes
SHA-256: 540ed9e1554a63386db219425578d76d5e00a48bc57d8b568a8a87c83af7707d
font_01_sfnt_off00022a78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22A78 18224 bytes
SHA-256: ffbe8302610ad85eb62b987f9e27e632650e16fc071e2770f626fb77cca6a38e
font_02_sfnt_off00025978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25978 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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