Malicious PDF — malware analysis report

Static analysis result for SHA-256 6390e132cc6cd073…

MALICIOUS

PDF

74.6 KB Created: 2021-08-31 12:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ffcfabb540c89e1602f07280066f366b SHA-1: 46e58537a5be99385ba75d4226ab52b0cfe85cb0 SHA-256: 6390e132cc6cd073385d1ea713dff4a2200df98885c894e4d5a0440c9c15bc11
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting it functions as a link farm to direct users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest an attempt to lure users to phishing sites or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://pixomot.ru/uplcv?utm_term=import+a+pdf+to+excel PDF link annotation
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16128fe2be0df5---satudi.pdfIn PDF document text
    • http://cnpair.com/userfiles/file/vubuwuronikise.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/tevanebizusax.pdfIn PDF document text
    • https://kalitelivideoizle.com/resimler/files/79480630882.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/b9fa8d7315553bb93799556cfbb462ed/51775963499.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202105201623.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/93f603ed3a27bc53805b5eae5876fef0/dalelizivoguxesupu.pdfIn PDF document text
    • http://intergeored.com/upload/File/70664999979.pdfIn PDF document text
    • http://teraval.cz/res/file/97746241560.pdfIn PDF document text
    • https://mides.vn/images/ckeditor/files/40106717477.pdfIn PDF document text
    • http://romangruszecki.com/uploaded/file/72200166873.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/lipixofigato.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/splqk7s2fr91hauin2ss86p900/baporewanobopab.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/6383da802d4f84e6e05590a890c57cef/54040548325.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9e6f1810d---43679393082.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/287978a9040ef4bc2bddf03dc0632c54/paxekogenemivipovegekozu.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/49222335407.pdfIn PDF document text
    • https://samoinstitute.mn/uploads/assets/file/sevika.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/29156753886.pdfIn PDF document text
    • http://icmasistemas.com/userfiles/files/govuzulaxideki.pdfIn PDF document text
    • http://studiopassarotti.it/userfiles/files/duwefufanuvupajamole.pdfIn PDF document text
    • http://cck-brno.cz/ckfinder/userfiles/files/bavatomegixadut.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b4084b1c752---19390879422.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/3992ee7f3168c52914bcf9f8bbd9af98/39448229744.pdfIn PDF document text
    • 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_off0000c3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC08 10468 bytes
SHA-256: c488180809d234d6304c88964dc0fb99a27eaa59e0fb826e110fb976ed2c42c4
font_02_sfnt_off0000f3cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CF 15888 bytes
SHA-256: 921d4679ab8b5aab651c25978826b1aaa55ae13b713762376c8a5c9abcc4ed0b