Malicious PDF — malware analysis report

Static analysis result for SHA-256 59124f6c4e567ee7…

MALICIOUS

PDF

88.7 KB Created: 2021-07-02 11:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 459c2a1ac20d663eba28d634de4cc2db SHA-1: 8ddeba6c71d2042ad0961c1f166bdfa54b517817 SHA-256: 59124f6c4e567ee7c9514d4dc9a70d7a6fd4766e40fe49de686b67b8770a1fd6
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress installations, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites for further exploitation or credential harvesting. No scripts were extracted, but the structure and URL analysis point to a link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • 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.
  • 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.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/m7gdceq76hfnrk330h0qtnl3g2/waxewetinuzonozonid.pdf In PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160c2635016e0d---geninawotoxirovagodo.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074008b4aeab---nipujezinuzuzatukovomez.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/b7fbfb18dc3af7858fd8a144f1970f8c/tovizikolos.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff5337380a---gobilan.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad460950d5e---rowonivafuxanuxivazani.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0c06812b55---34318366445.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160741ba44133b---70548855931.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/80410028321.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/e38b8747f930faf02d810f9cfb0ea64f/40767055279.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/gamegetorepezowafe.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/447b9459ba8194b51cb2a77341a4b844/24951707973.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/63ff328411d9ba45d0a86dad1af9f66f/duzerotavasoneg.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/011f8254d66c395e4bce063547e3bb27/53232618034.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a499ea9e3e2---14113353899.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16070334d92b4f---95883202725.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/m9m9d95cjjivj014kqtpjhdhv0/66613092355.pdfIn PDF document text
    • http://texasstatealphaxialumnae.com/clients/f/fe/fe72632f573fdc77cca6b85875c63e8a/File/wagibunumelevumadusudeb.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/fivisadeziv.pdfIn PDF document text
    • http://wawabed.pl/uploads/userfiles/file/guwup.pdfIn PDF document text
    • https://istanbulbalbir.com/upload/ckfinder/files/mewofem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=antwerp+is+located+in+which+countryPDF 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_off0000f6cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CC 10892 bytes
SHA-256: 8e42153feb7e50b36a6e0a305f68723acf7f6e8c5d78a1c4a40ceffbba958509
font_01_sfnt_off0001100d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001281f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1281F 17344 bytes
SHA-256: ae1479ec3a622eeccb1938cf03993c26cc0e6035c6c27499d9af051d5fa68057

Open this report in the interactive analyzer, or submit your own file for analysis.