Malicious PDF — malware analysis report

Static analysis result for SHA-256 d565a43169a92eb5…

MALICIOUS

PDF

73.5 KB Created: 2021-06-26 12:45:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a77ef14f47eacf81ad181962c37d02a1 SHA-1: 52e444083701c810dcb103485a1bdc34d24ec454 SHA-256: d565a43169a92eb554b4f8d163918a636b0543bbfb6db873d9e9879156eaa808
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to external websites, many of which are hosted on compromised WordPress installations or disposable domains. This behavior is characteristic of a link farm used to distribute phishing content or malware. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607da0bc5dec8---7614452368.pdf In PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878556c96fa---64815892191.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/qm145k9dbgj3rn8cb2hkrsqged/59466124182.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e95bf99cc4---5011017658.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b92be527821---bepukewogenevep.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff3af7d7c1---fokas.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160a09deab3b64---dipagodazuzixif.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16077c0cda6bba---saruwemorinezux.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/jajizezasuxomuw.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160996f861bc48---sabezivezi.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8ad2d0479---tigapamed.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/27160698562.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/6c7231c46fa9288273cc8c2ddbacea73/geratafigizaditola.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b00a815c3---85494326036.pdfIn PDF document text
    • http://novelinternationalschool.com/ckfinder/userfiles/files/45682767007.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/dmatlak91u6q1lrsvdv9bdkc31/56201216379.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/4b177a55f6682cc558cefb582ace3f47/51592738517.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160966564ac0a6---totalodejavajasu.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/10bc27ad48b2b4395a8bf56669f6f1bc/73367853843.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/pinavivusaweseko.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16095eada0e48c---34466152888.pdfIn PDF document text
    • http://thesnowmanicecream.com/ckfinder/userfiles/files/96002042690.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609baba689637---pizoludu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=radius+of+semicircle+inscribed+in+trianglePDF 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_off0000bbd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBD8 11104 bytes
SHA-256: 1aa5759576235d95b05cfc3afc2950c66910946b59c251ac71b345f8c0f42999
font_01_sfnt_off0000d589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD589 16468 bytes
SHA-256: 440bff0b86e65687993c2d80466e09ba568858b387c07c29710b5f0658013480
font_02_sfnt_off00010085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10085 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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