Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e69f54d3dc07755…

MALICIOUS

PDF

81.4 KB Created: 2021-08-27 15:44:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8a978413c5f17c55a37c6de4f2ebeb84 SHA-1: 4ce09733754e55f0f2a087d00c82079f96437be5 SHA-256: 2e69f54d3dc07755d646b1b0dacc5aa13247fdea220e4bde2de166f120dd9478
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to potentially compromised WordPress upload directories and other disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The PDF structure and embedded URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/b8330f14a7a8e395e63fbc6ea5857b23/wivisex.pdf In PDF document text
    • http://banphimchuot.com/userfiles/file/gubujajode.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/50897689791.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/8284e778ba101eb6b6c4e11c12e7be22/87146864727.pdfIn PDF document text
    • http://cloverpark1961.com/clients/6/6a/6a73a08bb68f643008adb5efbbb44e43/File/riguxela.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/161006b60ca65d---foxalefurorenuwamufa.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/4qp1vvihjbp268ufl2p7ddvi99/69261991149.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/2i8ek2iugflv4irkrpbloht5t0/38933636341.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/34805122529.pdfIn PDF document text
    • http://oembag.com/uploads/files/202108142050388068.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0e86afd65---tovatuw.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b356966d753---97756988747.pdfIn PDF document text
    • http://myphammonly.com/luutru/files/gikamuvowewironewolan.pdfIn PDF document text
    • http://loscogliodifavignana.it/userfiles/files/3791703382.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d60e9b27ab---6224469008.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/fizetokeman.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/4519185824.pdfIn PDF document text
    • http://hanboo.cn/Uploads/file/2021082323372170554.pdfIn PDF document text
    • http://buckleyfamilyofdarling.net/clients/0/01/017bf228c8331327bdfb67b1798bff80/File/totezetupufalimeniwedepo.pdfIn PDF document text
    • http://sonsuadogo.org/Images_upload/files/39558273572.pdfIn PDF document text
    • http://startmatbaa.com/userfiles/file/35962225107.pdfIn PDF document text
    • http://kingtonkatsu.com/uploads/files/vovadizo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=why+will+a+dog+eat+grassPDF 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_off0000da57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF269 17232 bytes
SHA-256: 4292c9f8f4052548f0068892861c8c99c5588c4a8947bc83f5af0e90d767ddad
font_02_sfnt_off00011ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC0 10616 bytes
SHA-256: 01e56b5b06bd341463d73f00f133619fd1c9b57bf4ee78994a156734f9c29b31

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