Malicious PDF — malware analysis report

Static analysis result for SHA-256 0793e56bd3f36189…

MALICIOUS

PDF

88.4 KB Created: 2021-07-31 16:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 3bf3271ceb202b13c2529d319224f933 SHA-1: 1262de9ad564e974dd1304f9e5dacd1783ec34f0 SHA-256: 0793e56bd3f361895898362845adffbc62ae49e1eb014539e241bbe585baba1b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting a phishing or redirection attempt. The PDF structure and embedded URLs indicate it's designed to lure users to external, potentially malicious, resources.

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://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee5fee9d104---zofowuraxi.pdf In PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/c58c3ef719ad11896df8b036b4d03a5a/50492298447.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079e8aa74962---subilowamixifawuvetive.pdfIn PDF document text
    • http://industra.sk/userfiles/file/77221259251.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/4e010916033b9e8bb670cf9fedb8e97a/dafir.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609814bad74d4---surilitowakakajefaken.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160be06c9b3aef---midezu.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607870591e488---jonebudabuz.pdfIn PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/545549b89e76ea8c6e7a7e65afad62ce/jatafotek.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2448db540d---bijavelujemuxedatuxe.pdfIn PDF document text
    • http://rauvuonsach.net/images/uploads/files/fafixenoxiva.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/280211586894.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/fikobopopebas.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/919f3c3188a5042959f9372531ab60a8/28357808688.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608444c3267b6---rivovafufaxegedezu.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/3ff99389dc70742eecf76155786f29d6/gasabivodoso.pdfIn PDF document text
    • http://angelofthewinds.org/ckfinder/userfiles/files/revoribopigavibuvev.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/717cd352696da968708fc74192162a0b/kiwafekatopel.pdfIn PDF document text
    • http://derma-dts.de/files/file/leladenonikoguza.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c493bd578c6---xomimivigete.pdfIn PDF document text
    • https://selltoob.in/ci/userfiles/files/49555809506.pdfIn PDF document text
    • http://apsencollege.org/test/fckeditor/file/jupulupefumip.pdfIn PDF document text
    • http://horizonpestservices.com/userfile/58651986314.pdfIn PDF document text
    • https://aslplastic.com/ckfinder/userfiles/files/zuvini.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=%D0%BA%D0%BE%D0%BD%D1%82%D1%80%D0%BE%D0%BB%D1%8C%D0%BD%D0%B0%D1%8F+%D1%80%D0%B0%D0%B1%D0%BE%D1%82%D0%B0+%D0%BF%D0%BE+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%BE%D0%BC%D1%83+%D1%8F%D0%B7%D1%8B%D0%BA%D1%83+8+%D0%BA%D0%BB%D0%B0%D1%81%D1%81+%D0%B2%D0%B0%D1%80%D0%B8%D0%B0%D0%BD%D1%82+1PDF 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_off0000e818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE818 21292 bytes
SHA-256: 6cd738c223676715d966851f8451fb6a31db1941fb804859d4b2923ecb9d95e3
font_01_sfnt_off00011d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13542 11440 bytes
SHA-256: 3fe4fd69b4dfb6451883a0483f9fcdeb270c6b967a23b11a11863c9136e09952