Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c115d4e7e2c6dd7…

MALICIOUS

PDF

71.0 KB Created: 2021-09-26 04:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: ce8a8c1d458d055c0c5812a1fe1950b4 SHA-1: 6d3f27e6587370ebe4894aebdbf68f61b3199462 SHA-256: 2c115d4e7e2c6dd7cbaafbb9c7e717da15322e75d21f8fdd9721e2bd06254cd7
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to host malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://crysiq.ru/uplcv?utm_term=how+to+get+free+episode+passes+2021 PDF link annotation
    • http://tribo.kz/userfiles/File/wadid.pdfIn PDF document text
    • https://fizjolech.pl/userfiles/file/8132773437.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/43438521037.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/161408a9d3107a---58562537126.pdfIn PDF document text
    • http://asqcert.net/files/files/23444930439.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16136816ac012c---39713994059.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/ravewutinaperewirino.pdfIn PDF document text
    • https://marugame.hk/editor_upload/file/rowosajosu.pdfIn PDF document text
    • https://megalight.lv/uploads/files/53235378436.pdfIn PDF document text
    • https://rosebankprimary.co.za/inc/ckfinder/userfiles/files/luweg.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/rurojikun.pdfPDF link annotation
    • https://ahreco.com/uploads/news_file/18863297669.pdfIn PDF document text
    • http://klientskazona.radeton.sk/ckfinder/userfiles/files/55214046669.pdfIn PDF document text
    • http://stmrcstvm.com/userfiles/file/16955343626.pdfIn PDF document text
    • https://yomadesign.com/userfiles/Proj_Name/files/xetune.pdfIn PDF document text
    • http://geoscan.it/userfiles/files/5684927710.pdfIn PDF document text
    • https://peiitw.com/Upload/ckeditor/files/fifasapeta.pdfIn PDF document text
    • http://www.aragonemprendedor.com/userfiles/files/24338800559.pdfIn PDF document text
    • https://wolfgang-photography.com/userfiles/files/mawil.pdfIn PDF document text
    • http://mylodge-naoshima.com/80225805908.pdfIn PDF document text
    • http://candientu24h.vn/webroot/img/files/ritabavegutajeletipil.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/tepajifadowazapineja.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/57126982379.pdfIn PDF document text
    • http://qdsenfeng.com/data/files/31300546046.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613a23bd9da93---zuvakesepegojara.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_off0000b32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB32D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB3F 16256 bytes
SHA-256: 0d23786aa72f7940d68bf089f4870b487b83866da94bc670cbbbf78365ff166a
font_02_sfnt_off0000f508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF508 10896 bytes
SHA-256: 71321bac0b897339d52025247c3a5fe1ba0f9d31419ee4fb158e36d691b24327

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