Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0077197e95fbca0…

MALICIOUS

PDF

70.7 KB Created: 2021-09-29 11:22:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5f62969d20ea6978480ed6cd0cf596d1 SHA-1: 5fcbfa62cd50fe5406c901cc70743713dc554693 SHA-256: d0077197e95fbca0e22a33c6c030c3dab60072eb3bcaac142d0731bd44adc124
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised WordPress sites. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://cructi.ru/uplcv?utm_term=aus+v+nz+rugby+today PDF link annotation
    • https://resulgame.com/calisma2/files/uploads/18572573475.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/7191384494.pdfIn PDF document text
    • http://hoilhpnqbthanh.com/upload/file/67559980058.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d8cf60cf3b---rulifixerawesevojop.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/fa6062d3606d4d2ae7504dbc96dbe7b0/82428209575.pdfIn PDF document text
    • http://fijiembajak.com/uploads/ck_uploads/files/58985069795.pdfIn PDF document text
    • http://l-max.ru/userfiles/file/81961310588.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/161511f252dcda---foripuzer.pdfIn PDF document text
    • https://indiantalentjunction.com/milan/media/roronamigi.pdfIn PDF document text
    • http://shangyi-pump.com/uploads/file/050649372520.pdfIn PDF document text
    • https://namkhoasaigon.vn/web/images/files/jupefamanemeko.pdfIn PDF document text
    • https://www.domosystem.gr/ckfinder/userfiles/files/jawuzurulin.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee3ce36543---77793368864.pdfIn PDF document text
    • https://economiadecomunion.com/ckfinder/userfiles/files/tuzalu.pdfIn PDF document text
    • http://gzsjlt.cn/userfiles/file/10803227110.pdfIn PDF document text
    • https://buffinvestment.com/upload/ckfinder/files/78101956306.pdfIn PDF document text
    • http://ghibms.com/userfiles/files/64157194258.pdfIn PDF document text
    • http://optikametuje.cz/userfiles/file/wunuw.pdfIn PDF document text
    • http://alanaf.ru/userfiles/files/nevemizav.pdfIn PDF document text
    • https://easternresources.net/ckfinder/userfiles/files/rokanewexikojowugamosasu.pdfIn PDF document text
    • http://yetisirkaucuk.com/firma/files/subuwubasixitod.pdfIn PDF document text
    • http://www.hermosabeachbungalows.com/userfiles/files/webofigeziviparokew.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161420c9e085fb---rebikumebajabaneteb.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/vexemurotagijagewemutela.pdfIn PDF document text
    • https://manhremhoangvan.vn/wp-content/uploads/files/55458425054.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613f1255044cb---vozurilaxadifapukin.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_off0000b530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB530 15420 bytes
SHA-256: a6106664239a09eee46c5ffcd720e866ae28d93c273acefe1a9d495f1753da4a
font_01_sfnt_off0000dc8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8D 10616 bytes
SHA-256: 2600930e986ad43dffb470cc25ecce68f83fb936befc41dd94b892b54e835d37
font_02_sfnt_off0000f4d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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