Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e02ccc9b4c3ef8f…

MALICIOUS

PDF

87.2 KB Created: 2021-09-09 03:00:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7de8937c510d3d3dd958a9f5e20ce7e7 SHA-1: 41ca79020e4ccc1b9879e479caf8934461b757eb SHA-256: 9e02ccc9b4c3ef8f37464fd3a741a8e934350cf340cac345538fde6ff15a93bf
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript suggests it may be used to further obfuscate the redirection or initiate a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://pistant.ru/uplcv?utm_term=reverse+a+video+android PDF link annotation
    • https://bem-sa.com/img/file/gugagib.pdfIn PDF document text
    • http://think6.net/ckfinder/userfiles/files/20210907120809.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/bakerobadanakugisir.pdfIn PDF document text
    • http://kustari.net/userfiles/file/30555350146.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613850ad86da5---72833467412.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/divenunu.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/44746635200.pdfIn PDF document text
    • https://nasikampung.info/contents/files/gipowejonubisimoniparor.pdfIn PDF document text
    • http://bachova-terapia.sk/images/file/70042548922.pdfIn PDF document text
    • http://novichiha.ru/pic/file/98022411790.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/58697521195.pdfIn PDF document text
    • http://medicalproduct.hu/images/files/jawija.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/febosikuxumezijutivi.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136e8650dbf5---moribowekegexaluzawo.pdfIn PDF document text
    • http://b40555.handyfriendship.com/upload/files/38166720293.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/kibitipokuboruvomumi.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/20081215960.pdfIn PDF document text
    • https://khambenhxahoi115.com/images/files/lutorowudut.pdfIn PDF document text
    • http://thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/43757394372.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/faropad.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/2tuac8bpagoht6v7r17900rmdv/kuzugegiluzipimav.pdfIn PDF document text
    • https://impeka.lt/components/com_mijoshop/opencart/image/data/files/letutomanokimiwumenu.pdfIn PDF document text
    • http://dhleisure.com/ckupload/files/boxewegideme.pdfIn PDF document text
    • http://kleinschadenexpert.com/userfiles/file/masesavisaxorinoxufaruja.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_off0000f162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF162 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10979 10208 bytes
SHA-256: 963c8037c55cb3f723f452dc77182291149d9c44f29559938b2baba00218e8bc
font_02_sfnt_off0001207a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207A 17840 bytes
SHA-256: 831a5932856a5d58dd8b76adfee9f673e947e5c3c44056eee254f6931c8b2cb3

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