Malicious PDF — malware analysis report

Static analysis result for SHA-256 5269b62d13707d82…

MALICIOUS

PDF

156.4 KB Created: 2021-06-13 15:02:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 93af6ce993eb7d9c6e507957a8079bb6 SHA-1: 278ea8703bcd00cc58a1985b6b1986d3bb6a4cef SHA-256: 5269b62d13707d823004fe018474be76e7aabc3bbd0bf9878b754904c18c4ea4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The presence of 'Harrius Potter pdf' in the document body and URLs suggests a lure to entice users to click on these links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://nomylo.ru/uplcv?utm_term=harrius+potter+pdf PDF link annotation
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8dfe14bf5c---senixovigudir.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/ea1e10e244ebffea4b866d689fc5d5b9/zajuseta.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/36f609ee53fe45f0f522c8d281a906f5/93629353508.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074082f2e79b---marewuvisebogoj.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b840d6960---topitomuv.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7cbab4408---25286898028.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/5op5gpp90kdpia3hvn7k7lobuf/86441035957.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/c98cfda02e70385459558172d63d2712/gipizun.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a497333c868---47864632376.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ceea23bb9---kelerubeduzi.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/dfc628de9c93c2498f48d7920209fe3d/50097025711.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/tatusof.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/017eacaef512390ef709024b2c0d738a/siduvolik.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/5d0d8a5d8d56e4dbe89c02f8e91164c4/37462386891.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/54836008644.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/c8734dc607fe21c54f813deb13158907/44750466279.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/9e3add048e5a4bbcff49db664aa2b972/799507378.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/46021172348.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001fa2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FA2D 4740 bytes
SHA-256: b5a35149f286761a8e6d63e0f6814ce0a53f02f1505343ea10a1e1ef90e2dfe6
font_01_sfnt_off00020a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20A51 8596 bytes
SHA-256: eb4989e10b1203c84539fb591010e63cc1c32c2b694ae90c374d08ce763421cf
font_02_sfnt_off0002227b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2227B 17840 bytes
SHA-256: 983d5f6bfa88934c92bf49ea590ea0bf461be968e2ae171ca2ae8ad0f8bbed0f
font_03_sfnt_off0002547c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2547C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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