Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9502711a0d81e5e…

MALICIOUS

PDF

70.4 KB Created: 2021-10-04 11:04:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 71995a709de95f53a782a21e7678c727 SHA-1: 713791907a55bac52ba6c5dece155768747b8cf6 SHA-256: e9502711a0d81e5e143a563de7ccdeea51405fdaf02a3b0403071c1d83e3aed2
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that point to various websites, many of which are hosting other PDF files. This behavior is indicative of a link farm designed to distribute malicious content or conduct phishing. The ClamAV detection and ML classifier further support its malicious nature, suggesting it's a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://archism.ru/uplcv?utm_term=god+of+war+2+iso+highly+compressed+for+pcsx2 PDF link annotation
    • http://mini-garden.ru/userfiles/file/nozevuketurukibeva.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/sojeji.pdfIn PDF document text
    • http://maaramachandifpo.com/admin/userfiles/file/kawotejumireza.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/161462a749da40---56695468186.pdfIn PDF document text
    • http://dsagco.com/Upload/file/natunijijujuxusowexodu.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea7a5e2945---wurotema.pdfIn PDF document text
    • http://ciatic.saintelserver.com/archivos_editor/file/wuvupugumudi.pdfIn PDF document text
    • http://stowarzyszeniemalyksiaze.eu/img/upload/files/47030678294.pdfIn PDF document text
    • http://classtool.info/upload/files/53063372179.pdfIn PDF document text
    • https://softnettechno.com/sribati/editor/uploadfiles/guberufagu.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16159ab8b7c56a---4179536805.pdfIn PDF document text
    • https://slide-bearing.com/d/files/biletukegunadugenidekile.pdfIn PDF document text
    • http://circolonauticofavignana.it/userfiles/files/ganeraxutezed.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/31175146988.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16156d4271738e---gotajiboramoliw.pdfIn PDF document text
    • http://embody.box8websites.com/ckfinder/userfiles/files/jiwutenirujibofolumilu.pdfIn PDF document text
    • http://yangpupark.com/uploadfile/files/vugiv.pdfIn PDF document text
    • http://architettipassarinmarzotto.com/userfiles/files/torusepimilet.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/bidedodevawebe.pdfIn PDF document text
    • http://77owship.netsociality.com/upload/files/32922350435.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614a1031deb8a---74370081908.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146fd9a925ea---76929244234.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/77715540298.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/1833f1c06d9d6e9c15a05488a2b6e348/86023113703.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_off0000b3cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBDE 14668 bytes
SHA-256: 22be075f575e0aed9a39176acfbb8b906dfd1ae5e4c2c741ca113205122e0350
font_02_sfnt_off0000f0b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B2 11324 bytes
SHA-256: d07ca315f3e080b0f92bc018fccab3319cc4549e4f58562c1932135a13ca91fa

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