Malicious PDF — malware analysis report

Static analysis result for SHA-256 36afc8a0a3424f56…

MALICIOUS

PDF

196.3 KB Created: 2021-07-02 09:25:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: be0ad86b32d9dbcc4eabd35eab8d9d8c SHA-1: 6cca0306b0195d123d1feeb1b46f16fe411164ec SHA-256: 36afc8a0a3424f56ee17b20a9c755ff5ac7fccb0b4660b3586f82a0d5dfea429
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristic firings point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9863

Heuristics 5

  • 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.
  • 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://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/1588c7b97ec12b3e5abe98414ffbdc61/21025904713.pdf In PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16082a61b1997e---55939539693.pdfIn PDF document text
    • https://senhewood.com/d/files/52209640565.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c070ceda800---kabiro.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1620900494.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/dibewoku.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160968f1ad0c38---mugozazedepulojeb.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16073a8a565761---gumowovesefos.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160838cd2d21fe---71141256682.pdfIn PDF document text
    • http://k-souz.com/userfiles/file/42201284633.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608478046bc13---fubapibe.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/pimufuwoj.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/41277531695.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/n5uj5dcdk81rk93ujtj4pvdnr2/52215315795.pdfIn PDF document text
    • http://alrehabourhome.com/userfiles/files/95862583213.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/69056709126.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091fbccbc951---20756147061.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/84a64b555caac17bb472384874e7365d/62532625815.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/61a80c6e0d2eecdf075e6f7f5e8e7795/rojavujo.pdfIn PDF document text
    • http://france-ex.com/images/blog//file/57242161444.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/2f034ace790decd48c37170f79814e70/wafijunidida.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d24c3e24d27---wokomadomewaf.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/1b3a9d27e4cc8f33da66680cccff581c/wufabu.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/6c843c0ca44bce9eba65b8abfba5a7b6/97581164016.pdfIn PDF document text
    • http://maristaslardero.es/userfiles/file/rosademiwamut.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3344b732a---24082320141.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=the+witcher+pngPDF 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_off0002a3c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A3C9 10204 bytes
SHA-256: d98f9c8f2320d287572595f35271ca472b3a704ee6d8a4fbd6cbab165cf336e2
font_01_sfnt_off0002baa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BAA7 19804 bytes
SHA-256: 49ec483f874fc0f51e630512d6f9c7d760ead78b6777e987a0582106da8a9e8f
font_02_sfnt_off0002eb27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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