Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c1c21417c363007…

MALICIOUS

PDF

79.0 KB Created: 2021-09-06 16:42:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ed4272189167781aca94a6ebc7eacdc7 SHA-1: b4e6fc13dbeb24e22935b5778111c3ae7e1f0ff0 SHA-256: 7c1c21417c363007fce6d627b81f3eef8566e4636e4825a8d5fe4ad310bd4464
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. The PDF also features a link farm pointing to multiple compromised WordPress sites, likely serving as a distribution point for further malicious content. ClamAV and ML classifiers strongly indicate malicious intent, consistent with a phishing or malware delivery scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f480eba6711---50208338099.pdf In PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/55pcosl9tlsbe7c6lvi5m3avd7/wirakigokomanaxefalu.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb5ad6afd3---natedunexedexizo.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/10912070747.pdfIn PDF document text
    • https://appfacile.it/file/65916729381.pdfIn PDF document text
    • https://nada70.org/userfiles/file/kikibetoxovezup.pdfIn PDF document text
    • http://tipkeo.com/js/ckfinder/userfiles/files/mabonababomuwovorawolo.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/b83aeb3bdc0ca34b5c31fb4ebe17ec73/21084535390.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/fenitumuvusedadifi.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/dutiweme.pdfIn PDF document text
    • http://kbchina.de/upload/89022128370.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4e7eb3f16---75155320034.pdfIn PDF document text
    • http://klimagra.pl/images/wysiwyg_img/file/38028631147.pdfIn PDF document text
    • http://renovfab-menuiserie.com/userfiles/file/10748960905.pdfIn PDF document text
    • http://hyundaidongdo3s.com/images/files/92581825022.pdfIn PDF document text
    • https://nhanloc.net/userfiles/file/32420208178.pdfIn PDF document text
    • http://www.pvvc.cz/files/39026630696.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/84808526771.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9e187f4a5---66294342893.pdfIn PDF document text
    • http://waltwhitmanclassof1965.com/clients/c/cc/ccbfa8a87e297cd67510599b8aebcb74/File/94039425509.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16078ccd0c8b6f---dexamine.pdfIn PDF document text
    • https://giga-tronics.com/userfiles/files/44597896109.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607829cbaedc9---60048978987.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/238e7380d3664e0c1b4e9d6fa08b35a9/lovokugebogu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=thermal+power+plant+report+pdfPDF 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_off0000d132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD132 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE944 17432 bytes
SHA-256: 27e4733b7962b6644fc95c7c23b175bfe81a2a061417614b0b93d4a5af3d5b9a
font_02_sfnt_off000116d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D3 10552 bytes
SHA-256: 03db337b385a5e63f43e79b593beacff6c080d88b81cca949e99fd4be321880d

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