Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea2f028147a1637…

MALICIOUS

PDF

96.0 KB Created: 2021-08-23 09:34:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 13f6ef3a6c1b604f682ac5758a831736 SHA-1: 8be71753d1a4855df7d007c2afeb79ac21f1a466 SHA-256: 0ea2f028147a1637ed12d71a4e876db824989f9354fd17bcbcb6dac39955a710
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

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://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/lodig2o4potrf6lc50hsjhmh7q/88599447656.pdf In PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/284d38680fb3670c675a276a328bde88/42327783385.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c88007eb516---zuzemisefuboguzevaw.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/pefobaramixezilijeremisuk.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/qvkkd807blvleem0b3mpebd3m4/33607186210.pdfIn PDF document text
    • http://farmaciafici.com/userfiles/files/10294556996.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/r652are653sagp6o10312l7el9/85108677255.pdfIn PDF document text
    • http://frutapacargentina.com/ckfinder/userfiles/files/xixodawunutivoji.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/74699916646.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/fd0946f63d2af061473d31f7f43d73d2/dobaxowodadili.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160837f0025384---joledubemanasoroniditajuv.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/6suitgcjq5ita5fp50vgj02kq1/kozofakezekevolodapegelam.pdfIn PDF document text
    • http://attlas.center/userfiles/file/kigiwe.pdfIn PDF document text
    • https://perfecthospital.org/ckfinder/userfiles/files/16224346520.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/0jtmveoob3fhk8um7ee7j4sc0s/66778632152.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/a54fd9010b749da661d619c41a5875ce/sebowofomomeket.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/22303265972.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160856145e70a6---61084167663.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/sapudadoditufeposabu.pdfIn PDF document text
    • http://slstudio.it/userfiles/files/4893691368.pdfIn PDF document text
    • http://ettorebelfioreliutaio.it/userfiles/files/kapinireniginosebadibugop.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b0fcc8df208---gexifobotilovuputu.pdfIn PDF document text
    • http://cokhixnktientien.com/Images_upload/files/rifugixe.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/3caec05a4f613713d62778785d0724a3/58339773616.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/8ede8eb896bomp6mcf25f22fu4/8698423394.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=yield+strength+at+a+strain+offset+of+0.002PDF 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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD632 17028 bytes
SHA-256: 7d4f390ea7cc34af016e99f6ab167bcdbf0a271d52ad64cfcd6b187a195d6a6c
font_01_sfnt_off0000ef3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3F 3972 bytes
SHA-256: 6ddabcfd2bf9c3a07fbe0195158adb362173f03177763b19aa54164312d80950
font_02_sfnt_off0000fe3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3A 10924 bytes
SHA-256: 02d0e8ffaa74c798ec95c117ddd12b05e4f621c72d52f8c0fc6411b20b4aa4c6
font_03_sfnt_off00011740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11740 20388 bytes
SHA-256: 80091da5fe116b186febe5d68371f862b24286b03e3f74579c78a038d655c679
font_04_sfnt_off00014d03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_05_sfnt_off000164e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164E3 1492 bytes
SHA-256: 1f098fa836e698ee66abfb5a2a0684d98f518a343e6910fb85346d180a41db8d

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