Malicious PDF — malware analysis report

Static analysis result for SHA-256 e00be786ebc4c5fc…

MALICIOUS

PDF

86.6 KB Created: 2021-06-28 05:35:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 06a76cd88360b164c00d4e8366f4a92e SHA-1: ea3a11083ad24c239052c7b79a185925ad35bb6e SHA-256: e00be786ebc4c5fc21f4a6aa61b36a74c9eb29e32ce083abccc90c2bb6da35c6
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF identified by ClamAV as Pdf.Phishing.Trojan. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely contains instructions for accessing a password-protected archive, a common tactic to evade initial security checks. The PDF also contains numerous embedded URLs, many hosted on compromised WordPress sites, suggesting a link farm or distribution point for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9881

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/rurfub2cs32j4d9nchqba74a2j/13509989420.pdf In PDF document text
    • http://daugiavanthienphuoc.com/media/ftp/file/22503909143.pdfIn PDF document text
    • http://prosquash.by/data/53000413708.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16079e53fd9add---26339428072.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc50087a72---nawoxuxuwunezikalunese.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607d304d5158b---wiludaxamukamapuwodim.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210527212245_1734373280.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/jujisuvevakufedefalix.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/vewuwonakivisij.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/6d59f70b8369b3a77b32fc2045bae613/74286491470.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/51e2b46923d046c65683ec5b868ef4eb/88088506169.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/54033325408.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d9459b90a---36677966968.pdfIn PDF document text
    • http://digemnd.com/UserFiles/file/xoluwakusiluwogu.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c521a29c25c---moxuzifonuxatiposumugomu.pdfIn PDF document text
    • https://blindnow.com/userfiles/file/luzudulazivasejit.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/5f0eb327ad80f1e1b035585a8b51f90d/65031461965.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948b13d5903---77574604986.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9161992fc---fuzopamezikegurifak.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b98c8cce56c---9904803472.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/o5e2vg5udchdc1l82j5rupl951/wazilewadozimoruko.pdfIn PDF document text
    • http://charivne.info/images/file/52091134275.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c444a8942e---5509565525.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=mussels+with+butter+and+garlicPDF 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://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_off0000ed45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10557 18296 bytes
SHA-256: 1ffb44326048b8d91e8a968bb055e1e7f3f4f1256fdbd9a8df168f2c9438bfb8
font_02_sfnt_off000135ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135CA 10848 bytes
SHA-256: a2a2b82735e479ca5a0ff2e8d5f71c1522672621a1c2e7c56f4197cafdaeaf41

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