Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e340789749ed03c…

MALICIOUS

PDF

77.4 KB Created: 2021-09-02 22:30:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f60a889e9fe8589994a5f4882f84172d SHA-1: 56915b7e9a180bb9c4977d9c1df61f9630889fa6 SHA-256: 2e340789749ed03cba74d8a9f076914ea81edd00a126034c8deb151f64a5e9f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many of which point to websites hosted on compromised CMS platforms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL findings are sufficient to classify it as a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://shaplaconsulting.com/app/webroot/ckfinder/userfiles/files/xejufegopazofigup.pdf In PDF document text
    • http://kxnjl.com/userfiles/files/lonobutomoximetomifukabir.pdfIn PDF document text
    • http://densayhongngoai.com/uploads/userfiles/file/wajidajeb.pdfIn PDF document text
    • https://anyimaker.com/upload/users/files/59300604087.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e009823ec6f---vowegufifaxoge.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/tuxokirev.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/zelagobevodafopesomal.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/rfbj51fcj9ftq3h20eodihsls0/78037845656.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/95974705886.pdfIn PDF document text
    • http://exosushi.com/uploads/files/zarodugajulapavazakerifa.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160cfe06fa2484---futuduvuwaterogero.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/c2bad934046330ae2791f1030724d7df/71534709509.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/ripelera.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/uqn5q04cqisjc99mignarprjuh/37673342948.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609000d670f30---vifidotosuliwaf.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7d17cbff3---fodezavibi.pdfIn PDF document text
    • http://rungruangsteel.com/public/upload/userfiles/files/1737071004.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9ac8a94140e03d641dc4747e76080d82/97119566727.pdfIn PDF document text
    • http://huiking.cn/uploads/file/12084935769.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/785381ce9a1df5ea8b6413c065f1b343/66159232208.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/043r7rbbeqbjj0kfl71k73ipt7/11822538612.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/9a59a4f456e4bd2f354e5bdf3cf6bb87/siwegezobuxide.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/58331118130.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=the+french+revolution+timeline+worksheetPDF 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_off0000c954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC954 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE166 17852 bytes
SHA-256: 4ef8562c3eb89fabfad3530412ef1c8348f5680608f0bd3ada1fb1cfd127d9c7
font_02_sfnt_off00010f91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F91 10744 bytes
SHA-256: 720b0aa941272a78aba7683b8273809f66cc4fc7a442761adfb00db2975a6045

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