Malicious PDF — malware analysis report

Static analysis result for SHA-256 299a88b7790b5149…

MALICIOUS

PDF

87.0 KB Created: 2021-07-07 12:12:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 79877bc44cb604ebf1d3c466a3b9541d SHA-1: 8776afe1eb313593b8dea2510fe0b6bc18c4da90 SHA-256: 299a88b7790b51495a3e7fbdc4de767d8155e7b1f37b147aae7884a65dd42ce0
172 Risk Score

Malware Insights

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

This PDF document contains embedded JavaScript and a link farm pointing to multiple compromised websites, suggesting an attempt to deliver a malicious payload. The presence of a "download button" heuristic further supports a phishing or social engineering attack vector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nomylo.ru/uplcv?utm_term=convert+word+to+pdf+with+copy+protection PDF link annotation
    • http://inarchengineering.it/userfiles/files/tijula.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/e6f1694d3f48f4146f1db60252a4d671/pogigezibavalivalat.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a90cec3804b---48931819923.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/3b25e60bd61e3f2f678b8cff70c7e790/6011779826.pdfIn PDF document text
    • http://carnow.jp/js/upload/files/58366312479.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160728d19e399f---2885511513.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/5a2c9f5a0cc2a45f6682dfd0ef44cda5/puluminizekawoli.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/87414827291.pdfIn PDF document text
    • http://landia-print.com/pdir/file/siwixobetusomu.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/wamodifugu.pdfIn PDF document text
    • http://ohstigers66.com/clients/d/da/da15611725e7ba20b6827cbf2e24f87d/File/57369981399.pdfIn PDF document text
    • https://kompaspt2.com/contents//files/44127859660.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/bmotcmiko1fjc8lu2mvml3l7rd/36999283799.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///29550101949.pdfIn PDF document text
    • http://halaljones.com/uploads/files/29130336147.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/d6v8glmqvc564c0vbnu148ftpu/zapovividoxojusipovikowib.pdfIn PDF document text
    • http://nexxosrealty.com/userfiles/files/88025389435.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/7765457642.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/f9be149a71d12d148b49781517b9bcee/32173589525.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd8a58d184---povifebixodutagixo.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/81730696937.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/5ee5324895da4fa1757aa75ddc211f3e/42444498642.pdfIn PDF document text
    • http://planbmedia.hufiles/58014002410.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9639dc46c---wakuxik.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/zuxufufojep.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/fuxifazexexakerufaxis.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8650e6c1e---pegelasigimiwum.pdfIn PDF document text
    • 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_off0000ef8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8A 10636 bytes
SHA-256: d9b9b1f8b0490205544cb05b7833eb1bcd39823fe62843352b1050c1756e23aa
font_01_sfnt_off000107ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FFE 17832 bytes
SHA-256: e5dec282121f621db6765371577cc0e706d3a102ec5ea7405cd1e2fe76c1264c