Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9016e5fc11e0c88…

MALICIOUS

PDF

82.9 KB Created: 2021-07-08 09:38:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 5a33f68cbf0dc1e365470b985f73450e SHA-1: 14e5ff47a74f1c466769c1e7ac6c1f4e246cc498 SHA-256: c9016e5fc11e0c882e1fe7c96ce3e51fbbfccfa2a5a16d31ea5bccf3e8a61ab4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. Heuristics reveal it functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The presence of multiple external URIs and link farm indicators suggests an attempt to redirect users to malicious content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://healthmatters.me/userfiles/file/28969353335.pdf In PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16084b3734619d---91288139549.pdfIn PDF document text
    • http://sooclose.eu/upload/File/14490647885.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/88c00e80ae92f67619a6239eae01e03c/demosilarubaduxenasex.pdfIn PDF document text
    • http://macap.nl/app/webroot/files/userfiles/files/1587670729.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/jlv8ui1mv5uodagj49sjuoriv0/lugul.pdfIn PDF document text
    • https://ecohort.com/userfiles/files/lixemopowoponurezodom.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles//file/kikonu.pdfIn PDF document text
    • http://shreyaghoshal.com/konadnew/userfiles/file/65569041661.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/91593859103.pdfIn PDF document text
    • http://yasairamenbar.com/uploads/files/xoligenukunuje.pdfIn PDF document text
    • https://ibeguiristain.com/userfiles/files/dekuganogusivumilogudo.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160961d2dd2cb9---momadefaramolemazurefar.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/e8cbf5345e1e5a47248c984c3e206812/35223447345.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6c802b7a5---66778965195.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608255411a7ab---kivobidu.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/mowalana.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2c4c0c024---tejeju.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/8dde11a6e7a7d25a3cb39aaeaa1f5e35/80351528881.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160c20cf1efebf---78409979154.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/35649972231.pdfIn PDF document text
    • http://envisystem.com/upload/userfile/files/99930167880.pdfIn PDF document text
    • https://service-panev.com/userfiles/jukip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=150+dollars+to+philippine+pesoPDF 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_off0000e0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D7 10700 bytes
SHA-256: 114ff498ec05b260a630e2e0d1c1fdaf20d46959a91bffc582b4a37f66982749
font_01_sfnt_off0000f951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF951 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11163 17076 bytes
SHA-256: 11229630c7b6c5a2c9b544a4540f377d7432cc66bf6c6951298baca8f423d3b1

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