Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3287b03178b1f3e…

MALICIOUS

PDF

82.5 KB Created: 2021-07-02 12:32:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 253c2d655b7bef57b694ba721b1fe1e4 SHA-1: 4ca961b913761ab8cccc4f8459d84fff9fabab36 SHA-256: e3287b03178b1f3ef5cc1f306f2b5884d93d510867aea999c576935f1bb571ab
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 https://huntic.ru/uplcv?utm_term=sexy+bunny+woman PDF link annotation
    • http://eastcoastbiker.de/sites/default/files/file/20463869921.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/4cdefff5795ac4902c20551171656121/39855927395.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/d4dd327204f3636905937390a505ed13/sakebivadufifusoriwi.pdfIn PDF document text
    • http://ayhancevik.com/images_upload/files/kizopulejikumebelov.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/4bc533ff6b518da6e0db7a4fb38d2b87/nomewefe.pdfIn PDF document text
    • http://anvlaw.com/userfiles/file/33207441508.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b23451b5cd6---87701299782.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/somovinanusawez.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094b1603e86c---gagijaletapowulugexufe.pdfIn PDF document text
    • http://premsaktidal.in/userfiles/file/3987353651.pdfIn PDF document text
    • http://roxburyhs1987.com/clients/63080/File/wilovunedupuvimofak.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc01cc26513---dibazulujufuditob.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/b117ef375f5428008c0279e1e9d87b28/getizotujebegovilerakal.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/vmnnuaujp6p0tfpbi33bqlu70a/45558032188.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/4798439ce3fff6b217a6cd37cada46b2/zogapuboru.pdfIn PDF document text
    • http://happy-travel089.com/CKEdit/upload/files/fipobubenepesapuxim.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/06519c9d09881de6e5bb4bf433840f60/57579236698.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/e2uqffpnfji06b4ed4uiinj5q7/nejuxijalamupo.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/pegm8qva6fr0g13dior044g2ls/27660536992.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/c0e7da10a0ea4218dbb8a239ad30f55f/legulutawewamukar.pdfIn PDF document text
    • http://plncse.hu/php_data/file/wibefopofagorixe.pdfIn PDF document text
    • http://cosmik-kinoteatr.ru/sadm_files/zevasotutusadelite.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/futuwudeselusoguwutu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f90f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90F 17012 bytes
SHA-256: 4ea2b470a6967245d2df2a45a5a9d02acd06eee734e48c319c99a83d2903cf86
font_02_sfnt_off0001259c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1259C 10380 bytes
SHA-256: c6e46c381bcbbfae1daf8529b6822b87a98455c3590a88cb6afb47dbfc3bbacb

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