Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb0373b429d2beec…

MALICIOUS

PDF

85.2 KB Created: 2021-06-26 16:37:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 2e967dff158323e21b5ed211452f1daf SHA-1: 6252934778fb2a7ecf6be453eae1963214e1f216 SHA-256: fb0373b429d2beec346fffce13d89a19446acf89952d133d7117a67615b5fe0d
196 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection, indicating malicious intent. The 'SE_BROWSER_INSTALL_LURE' heuristic strongly suggests a social engineering tactic to trick users into installing malicious browser components. The presence of numerous URLs, many pointing to compromised WordPress sites, further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d57e59b51d9---kibatod.pdf In PDF document text
    • https://empirepin.com/calisma2/files/uploads/davufubamepiwunipated.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/4ea0a985b3b2bca903a9c190cf36f503/70193783805.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/romusexoluxozumaper.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4e501e85a---vasuzomo.pdfIn PDF document text
    • http://rainbowcaterers.in/userfiles/file/koxelotunibelulavidanoza.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/defezalupuzovipilebi.pdfIn PDF document text
    • https://unitjaya.com/contents//files/5998640508.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b65cbd389c---84975741151.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5e1bb9874---6169677844.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1b9bb0dff88a495e21c1ea96d0dfec0a/43816465080.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/80257497762.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/6hdmfst6nu54v919net12shcaa/manedaj.pdfIn PDF document text
    • http://stalmont.eu/userfiles/file/kiwabiluwizajesotek.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/wifesezaruzugefubegusobuf.pdfIn PDF document text
    • http://tomnhenryanderson.com/clients/8/8a/8a1068334c160bb49438aafe8043afff/File/mulasuwivaz.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/cruhfaqp505sh47o6hraikpugd/labezavukava.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/b10a34a1b00b7a2b5c4835efc6d5a560/31290116644.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e656bc3d4---gugarebodu.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/4cq7o8f6h03j0odrkso9sivvmd/jofokip.pdfIn PDF document text
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607727d80a0dc---64649335432.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=copy+from+secured+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_off0000ed33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED33 16532 bytes
SHA-256: dcd8566c598b73288a9ccefba910758f2b773283b78779c6c54b0b3469283254
font_01_sfnt_off00011805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11805 10524 bytes
SHA-256: f94f149d4d958a0eff2c2b04a8db648e279ac1ec87d61ea269f26113f23dba2b
font_02_sfnt_off0001300c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1300C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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