Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc1d731e5bb478f6…

MALICIOUS

PDF

87.0 KB Created: 2021-07-02 12:56:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 5f5d9c88f5c24c38ef2dd016189bc479 SHA-1: ec2b2c367743e5850b82eff0bd2786f8ad102237 SHA-256: fc1d731e5bb478f69c5114c52933a0cdf2b76e52155e12ca79dc1b8b8a11e553
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ML classification and ClamAV detection as a phishing trojan. It contains embedded JavaScript and numerous links pointing to compromised websites, suggesting it is designed to redirect users to malicious content or facilitate further infection. The presence of embedded JavaScript indicates an attempt to execute code within the user's browser or PDF reader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • 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 https://pistant.ru/uplcv?utm_term=stage+fatality+mk11 PDF link annotation
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160a38e7e10458---44644870956.pdfIn PDF document text
    • http://maraulsan.com/ckfinder/userfiles/files/97426625583.pdfIn PDF document text
    • http://vencedor.coop/images/admin/file/5490038827.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/gukugodovuluver.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16079c736b18fc---67405953908.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/jmcot98sb3hk9cftd10lf7r763/bujeludiguri.pdfIn PDF document text
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/fn98k47o70bildnqfa7kqqqbmj/visavutukigelunuziriloguk.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/87769946484.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/zefasipuwubajuxo.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/mapuxomomuz.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/cdd695bf91b64ed53a8e1e3b0941ad55/78750968018.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/98546814109.pdfIn PDF document text
    • http://chroscina.com/userfiles/file/dosax.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd32baba33---42445456810.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d9809ab55c8---danatojugux.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/4101349afbe6fb9988490c6abdf4af8b/61026163049.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/84d2880a4fbd4f07dd026f35141246a8/13459067452.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/tamokiragerew.pdfIn PDF document text
    • https://octvads.site/js/ckfinder/userfiles/files/99554178514.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16082d7c08bb5f---zejozeniduwisuwexifexu.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/408630cb0342c0825cfcfe28a84fad61/majozajukabidekalisotebi.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607601030bb4e---30061005390.pdfIn PDF document text
    • http://stattus.com/assets/file/83767019755.pdfIn PDF document text
    • https://chachachat.info/js/ckfinder/userfiles/files/62796611505.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_off0000ed1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1B 19528 bytes
SHA-256: 58433a8b15d2f47d0f22433d7e63bf3bb38756110fd7fe59d02233d5a7d01af3
font_01_sfnt_off00011db5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000135cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135CC 10400 bytes
SHA-256: 25caee6345de3c64f71e0c27accbe36349f34de9254f2d3075738d8475e8b5f1