Malicious PDF — malware analysis report

Static analysis result for SHA-256 3645da0afbcda05f…

MALICIOUS

PDF

90.2 KB Created: 2021-07-26 05:57:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2a691f112054dd81c5c9066cf16e7207 SHA-1: d25386265de73cdb52e3833747d72fe07aa49f0d SHA-256: 3645da0afbcda05fab5d5ac8e23640b011c16f552dc79d964e371c4535c4b20c
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The PDF's structure and embedded links point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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.
  • 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://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a364978918---4463512103.pdf In PDF document text
    • http://www.findvoters.com/userfiles/file/22565532222.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16084857ed7254---vinitanegox.pdfIn PDF document text
    • http://planbmedia.hu/files/sokiboruputefemuguniz.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/316e49cdc688dc035281a60e76b6e41a/19804516841.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/32508824670.pdfIn PDF document text
    • http://dahchen.tw/userfiles/file/tekefipebemete.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d04d221e6b---vomakolisupiboje.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608babc79eb56---36415905592.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a99fe21de1f---27102266655.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16083b2b3c80c1---fagatadekakamogasopidew.pdfIn PDF document text
    • http://wamer.org/userfiles/file/fugojapomuwixewi.pdfIn PDF document text
    • https://tiguan-wiki.ru/file/42315332013.pdfIn PDF document text
    • http://tlproduct.com/userfiles/file/nulixadigobi.pdfIn PDF document text
    • http://sattamatkapatti.com/userfiles/file/fuxegunu.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/xobojupaledig.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095bde8de5c8---85264567624.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/4d54fb1047cd73ad311cb24e728da68c/3468791177.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/xubosaredijor.pdfIn PDF document text
    • https://markmont.eu/editor_uploads/system/files/sixilazul.pdfIn PDF document text
    • http://vnationwide.com/userfiles/files/89924101228.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/rozajuvefujedevowudotofe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=ejemplos+del+signo+linguistico+articuladoPDF 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_off0000f5ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010dc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC5 11068 bytes
SHA-256: 01d831ca7ff4a0ed2e061c32bedc3e4046b3132792a85e00b6e23963ffc91f60
font_02_sfnt_off00012740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12740 19724 bytes
SHA-256: 64190192a931566d1d147a5d0adc7dcbe9c3719fc19c21f0c3f3c493ed7ccdc0

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