Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2083294c4c3b5f2…

MALICIOUS

PDF

99.9 KB Created: 2021-09-07 17:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 304c339a53dd499c4046875e509c069b SHA-1: 1adac8ba9c7729f0ffbcfaf7d9961ed77545c4c5 SHA-256: d2083294c4c3b5f2c5da04d000414b537afec4d579ad729c3cfc707afda5d64f
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are consistent with attempts to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://medvor.ru/uplcv?utm_term=contract+law+pdf+noun PDF link annotation
    • https://clumba-indoor.ru/files/files/lobirupipuluzuwoj.pdfIn PDF document text
    • http://anhhieu.vn/hinhanh/file/gagoxanemasuxivu.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/50464630647.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/3452ff37945f58ee6c7c9e750cee2d86/gaxewojurodasosuvovinevo.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/f8e988345e0203e1d7e3859dcc96626e/ratugusezim.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4a499deea---pebitidevinizasotabebe.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612c4b685456a---kutebifivibudavoje.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/ggpiivca33vmpvhhql5dbk71d7/sejoleguleferelozaluf.pdfIn PDF document text
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/tazupipuvaresawizij.pdfIn PDF document text
    • http://denki-shonan.com/uploadsfile/dafuritamori.pdfIn PDF document text
    • http://mojahotels.com/ckfinder/userfiles/files/jubezijezeb.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c92985a82---didijewisofusavujisuna.pdfIn PDF document text
    • http://zzquansu.cn/d/files/4927928118.pdfIn PDF document text
    • https://www.stjohnhomelessshelter.org/wp-content/plugins/super-forms/uploads/php/files/20028766fbe20ee3d0289b923443d903/jabamabisubanel.pdfIn PDF document text
    • http://sushi-belovo.ru/files/40631776712.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e1f5e983f---6690552582.pdfIn PDF document text
    • https://morganmethod.com/ci/userfiles/files/kedikig.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c02d428146b---gabipuvesafisojivel.pdfIn PDF document text
    • http://indexone.ru/upload/file/runovovezuxadifumisozivim.pdfIn PDF document text
    • http://autoscuolepintozzi.it/userfiles/files/521853917.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/maredere.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160a283b829993---mozejadikoxema.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_off00011dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFC 10436 bytes
SHA-256: 09e4fe119021aaaa77a05430ba93e913ee0a8adb2de7e6cfeaef834d5f6366a1
font_01_sfnt_off000135e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135E5 19948 bytes
SHA-256: db6f41cdfe82806c9d9fa75b401a9c23fc5403923409eb6a63c70166032b4a50
font_02_sfnt_off00016a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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