Malicious PDF — malware analysis report

Static analysis result for SHA-256 63038649143acafb…

MALICIOUS

PDF

78.2 KB Created: 2021-07-23 15:06:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8d6dee0d27aaf880560d40f4218e33af SHA-1: cb53e7d1016c6eada31a9afa3714d5b78b4df95f SHA-256: 63038649143acafbc5279fbe32307d876226b6e957dfe1bb22791346dea11a1a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which point to compromised WordPress sites or are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution via these links. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic suggest it's designed to lure users to malicious content.

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://divinenine.net/userfiles/file/fagunenojolamabatowevara.pdf In PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a649ea01dac---36910380242.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/46c3e8402c05b38e86079eda77edee46/zinibi.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/11936500347.pdfIn PDF document text
    • https://abeess.com/userfiles/file/54285253416.pdfIn PDF document text
    • http://globalquestconsulting.com/userfiles/files/jiwobeg.pdfIn PDF document text
    • https://noddy.nu/images/file/purizuveji.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/1521c4684bb0b291341bfec55d267255/37992113683.pdfIn PDF document text
    • http://rapet.hu/files/votilut.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa5529c6700---82691210376.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/18294201911.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a1e5ebe41---13925282951.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/tt849oif8nqqdvfoo6unfbfc7d/83976396776.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/tssgbbm55k6acklng8fen9beao/susufirebodule.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/ltc8pb33rj248aktmu6r8knscc/mabalimazanimoma.pdfIn PDF document text
    • http://mosjob.ru/images/file/70707282258.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9869372a4f---jezepejiganununewimoze.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/3926343797.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5cc6742a86---nisej.pdfIn PDF document text
    • http://nakajima-ya.com/upload/save_image/files/18371761264.pdfIn PDF document text
    • https://bmat.mn/uploads/ckfinder/files/27001151868.pdfIn PDF document text
    • http://lawrence-spruill.com/clients/42275/File/jenafematuledazapuxak.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/52773929168.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d7a0e7e62---bonakun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=beauty+instrument+manual+en+espa%C3%B1olPDF 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_off0000c9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E2 10884 bytes
SHA-256: 4d8d9432879512aea8c22adccbcd09d0455497de952778b3b8253e354b3c02cd
font_01_sfnt_off0000e2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D4 18236 bytes
SHA-256: ef39d36d0323f730d35bbff6e21ae73421c3c032a0fc123342f4b0248d11a20f
font_02_sfnt_off00011142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11142 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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