Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7879123f1672ff…

MALICIOUS

PDF

107.7 KB Created: 2021-08-03 07:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 36ea1e56c5392e9ee90b9f4cb54de598 SHA-1: 281f3cc700852b87f06e603496427ce3bce2ed8c SHA-256: ee7879123f1672ff96de8c4ec8cd121d672690d34ef0b98b8e386ea3ed7512a8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a phishing lure or a distribution point for further malware. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://huntic.ru/uplcv?utm_term=words+to+describe+a+sunny+day PDF link annotation
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160acf60ba31d4---98914539355.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071a30932db5---71916841110.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/d17707277cfcd45fdaf7d3956badfe65/tavagugawuvub.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/c0a76feec88664d21e1f77fb02713130/68720729255.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c588677285c---fomijijupufamijoxosivaz.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16082365b9ef5f---gevodasomamakute.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607854d1925f8---83434282712.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1623126510.pdfIn PDF document text
    • https://finatwork.com/userfiles/file/nuvifuf.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf031955841---wopiwelagefuziduzegetu.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088e5692a151---22936252027.pdfIn PDF document text
    • http://hotstamping.pl/files/file/83358186907.pdfIn PDF document text
    • https://laser123.com/geektic/files/jorajofoda.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/jn18rpcsfsuhrmbcufqq5rdsk3/zunekoziniguji.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec514cc9e6---zesises.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/7a7840099c48e6bf31c8ff6778d5fc17/tomaxuvezijogozuwubijen.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/41412955759.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/wujobopojuserolufip.pdfIn PDF document text
    • http://shiksha24.com/userfiles/files/32987312413.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/zanaz.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/c2fd2fd54cc4c6e0aa798205c8c9329d/xaxuzuzogakutikumakam.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1ff0d0a228---69306341478.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/79571614844.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_off00013dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DBF 18316 bytes
SHA-256: 986f5d963d18716eb5a6ff3ee1b00c7f9e8f433427f9e396efe100b1ea31e755
font_01_sfnt_off00016d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001856a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1856A 10664 bytes
SHA-256: 88b2829d0aa7bd8893a4d1d668d3ec18e5a8d3dd3f0dada0a70f514440e0fbb5

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