Malicious PDF — malware analysis report

Static analysis result for SHA-256 05dbea60b361a0d2…

MALICIOUS

PDF

87.4 KB Created: 2021-06-26 20:18:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 4877e7ace881b979fb6eb0f8488db0d6 SHA-1: f03d72558353936a863ea3b1ab3259ea3c00f103 SHA-256: 05dbea60b361a0d270a185326c90f3f1971a50061c33d84b1a389ea150874237
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to distribute malicious content or conduct phishing. The presence of numerous unknown URLs hosted on potentially compromised sites reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d7a74e56b9---53872245861.pdf In PDF document text
    • http://dui-antidote.com/images/userfiles/file/mizovefexozajurefuveb.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2a46d20a1---42132093639.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/2ed81418f49516eec38769ef086d7311/48623977676.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd369c1c02---28986468708.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f9ca5225c---kelonitafisimux.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/lupamuzome.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/o6ttvh911mibp5n0b85ldfq4lk/wefamasolunivosaza.pdfIn PDF document text
    • http://ccforum.kr/uploads/file/1622418283.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bff248e1b14---jafenivegukuzekaxap.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094993000c6a---84813013318.pdfIn PDF document text
    • http://abpaluso.com/upload/file/2096047075.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/9096254116.pdfIn PDF document text
    • http://phayaotechno.com/UserFiles/File/69420649135.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/924bc5089a871372ecbbebb4492336b0/xudijemobavi.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/do43e8q0kuqe2n7763io3vbmeo/judofoteloteli.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/maxifaxi.pdfIn PDF document text
    • https://bloomeng.com/uploads/43080496772.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16076a58e1bf16---kixin.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/vuwurukam.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ecdcf3dcd---97886658345.pdfIn PDF document text
    • https://vieiras.pt/imagensprodutos/file/33841173826.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5e821f441---vakopatorunala.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/s87i3jeus8buopk2a4kpmeapf0/midopa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=oven+baked+cutletsPDF 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_off0000f2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F4 17864 bytes
SHA-256: 13a556ed29061f9adbe9114bc5df6a8e128e571c913aae6f60aa6b9c930131af
font_01_sfnt_off00012076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12076 10472 bytes
SHA-256: 7cf01aad66f5e17ab6fc43a9b906a8d2303596d1d30d78677d2d5ad421546be3
font_02_sfnt_off00013883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13883 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1