Malicious PDF — malware analysis report

Static analysis result for SHA-256 b702da9ea5f6ed94…

MALICIOUS

PDF

86.1 KB Created: 2021-08-25 13:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4fc617cd102bd92564585aafd3344264 SHA-1: a9cddcd16a77021f748adeb70c8adec431133ee3 SHA-256: b702da9ea5f6ed943fbb53e6810a2747c71e42d194fccfdf3175b65d2a29889b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely intended to redirect users to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate attempt to obscure the true destination through a network of low-reputation links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://agendatourvietnam.com/hinhanh/file/94849094738.pdf In PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7027a13065---35512890791.pdfIn PDF document text
    • https://itandem.net/ckfinder/userfiles/files/sutikew.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/78359819485.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4244879ccf---kimuxowojiditukajatotu.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dafe6dcec8---81043289636.pdfIn PDF document text
    • http://seibyou-koujien.com/files/files/57236999542.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dcea2e40800---90121512248.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/49642652601.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/dopafamifimenamu.pdfIn PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210726_0469F38DB0DD75B7.pdfIn PDF document text
    • http://domusanna.it/userfiles/files/783953996.pdfIn PDF document text
    • https://nhathuydesign.com/wp-content/plugins/super-forms/uploads/php/files/2i1k894n8jcqjnai9fl9kdbm5k/78688484967.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/cd5109e4b431b22346348bc8184ec520/gatusewozusowibenufe.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/0345355506174c52307ca9c7f873fb96/66597864999.pdfIn PDF document text
    • https://ottopianos.nl/files/xatepufitonejilas.pdfIn PDF document text
    • http://slsnn.ru/content/file/95769975322.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160985cbd73d2a---38461900020.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/zonikizogubi.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/damitobem.pdfIn PDF document text
    • http://accapierre.it/userfiles/files/24110332130.pdfIn PDF document text
    • http://geose.ru/userfiles/file/nakoluginakosapakuzorani.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160b609e736cbd---71337509011.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=the+mary+magdalenePDF 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_off0000effe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10815 10292 bytes
SHA-256: c357d5d0aa7eb3ae56b3145814c1975a5f3a77e99b25ddd36cc5708f3776e89e
font_02_sfnt_off00011eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECA 16968 bytes
SHA-256: cac039345ef92bcd66aff6092f16078684594469347929b40be5681e2dc25e55

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