Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d08484c30c1db08…

MALICIOUS

PDF

87.6 KB Created: 2021-09-14 06:28:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c6cf234e2e405d17d2f0e35e8f51bf1d SHA-1: 770eace8d9f1966a3aaa918173e304c92834b44d SHA-256: 1d08484c30c1db088055950062456165231a0e25549437c67da3819c8eb0c390
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, which is a common technique for delivering malicious payloads or redirecting users to phishing sites. Several heuristics indicate the presence of link farms and compromised CMS uploads, suggesting the PDF is part of a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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://queure.ru/uplcv?utm_term=bubble+shooter+windows PDF link annotation
    • http://unipsyclinic.com/userfiles/file/20210912032259.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/libov.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1630747405.pdfIn PDF document text
    • https://lifesmart.lifesmart.ro/ckfinder/userfiles/files/35397375395.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/64885484631.pdfIn PDF document text
    • http://winso.tw/userfiles/file/tenuzeveduzobiriwosan.pdfIn PDF document text
    • https://suncables.co/images/file/jumabifawabilelonoga.pdfIn PDF document text
    • http://lokalsport.no/userfiles/file/bozukerubijamusuwajabe.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138129d4f5b4---15196486147.pdfIn PDF document text
    • http://xn----dtbhwhggdaoqfh3d.xn--p1ai/media/file/kegitibila.pdfIn PDF document text
    • https://kolorubursztynu.kolorubursztynu.pl/web/uploads/files/nilujixukitolorudozepesaw.pdfIn PDF document text
    • http://ihanzao.com/userfiles/file/20210914083244_513049282.pdfIn PDF document text
    • https://dukupahit.com/contents/files/82795209969.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/tlks6ajdv4t1ae8ukro0tlirc9/91200202960.pdfIn PDF document text
    • http://wadirumshootingstars.com/userfiles/file///94359793457.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d7bb07dd09---49512387933.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/qa0fcsftcqf2h7j78p4luagd57/5713420181.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/20707693188.pdfIn PDF document text
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/jasave.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/76346069619.pdfIn PDF document text
    • http://luisacortesearchitetto.it/userfiles/files/wapobadezu.pdfIn PDF document text
    • http://pc580.cn/upload_fck/file/2021-9-1/20210901225117254808.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613a2e9037f71---59536315001.pdfIn PDF document text
    • http://basketaci.cz/UserFiles/File/rusoxatikedanoni.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1612fa009e48a9---bixefalubiduwizamapufila.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_off0000ef8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8E 10564 bytes
SHA-256: 239eda3c65258b8b1c3ef38d45320463cd4987c797e31a84545ca1ae4e505cc3
font_01_sfnt_off000107ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBD 18840 bytes
SHA-256: 5cb404bf651fb9c99b13fdbc030567212bd0baa024bcd3dbe7597f3e06c3afbe

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