Malicious PDF — malware analysis report

Static analysis result for SHA-256 0683d3c9a2fad66a…

MALICIOUS

PDF

84.8 KB Created: 2021-07-10 13:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: d0593e56af4456b2164a3df8b23bda4e SHA-1: bbfbba67acd8eb514eb5925e897837842bdd868f SHA-256: 0683d3c9a2fad66a2cd9a7a84b1cefdc881eca54ca735412f18b5b9e424ad474
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a large number of external URIs, many of which point to compromised CMS uploads or disposable hosting, forming a link farm. The primary purpose appears to be redirecting users to malicious sites, likely for phishing or malware delivery, consistent with a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 https://garglob.ru/uplcv?utm_term=my+ding+a+ling+chords+and+lyrics PDF link annotation
    • https://sfasg.jp/js/ckfinder/userfiles/files/63784892202.pdfIn PDF document text
    • http://annamsaigonlaw.com/upload/files/kizagapa.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c84d309f6f8---zobumu.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/21893227078.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/bixidokeluzagufef.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607040c86acaf---44717321835.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b7cd45a0433---87172839020.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/dadatarapem.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160be475f35837---sobeduxiranaxudimusog.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/35978212902.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077572a650ba---72441370461.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e3d08cd766030c6c523835c3b3369d64/30867567839.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/lawovifara.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/72586b29edddaf9e5b8ce3a0566688c0/lekexirodemiviwuxis.pdfIn PDF document text
    • https://drlanda.hu/user/file/bivakuvolu.pdfIn PDF document text
    • http://hondatayho.top/img-ngocbao/files/sojusu.pdfIn PDF document text
    • http://eng.sut.ac.th/tce/2016/administrator/ckfinder/userfiles/files/pumizisavosiwaxu.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/ca29d58ea1a81eae189eda2c5375f5ec/88924771584.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc9265fc8a---gavilotavamuposizuvobevuw.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/bf9e2579974829810ddac5467008f59e/zavatezuvas.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/kmjgvemt1thsm1dfq7jbs56e7l/kewiseloguvubujedidigafof.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_off0000e59a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59A 10524 bytes
SHA-256: fb96565241aa5e4c19eb6ff68f8bee4dac1e4c5bccc6f55d8dfedf9a07d9fabd
font_01_sfnt_off0000fd3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11550 18556 bytes
SHA-256: 4d12de3df14958aa8f7fe5c2c058e734a3fa60ba4ff1218029c54e12f59702f1

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