Malicious PDF — malware analysis report

Static analysis result for SHA-256 066f6f5be72a6c61…

MALICIOUS

PDF

93.1 KB Created: 2021-06-09 23:20:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 243fee72861468c9075d1cd30bcfdd27 SHA-1: 71050f850ca378a4a54a4dd07ebcd1f644aa6faf SHA-256: 066f6f5be72a6c61fe0d961efc63ca7b117d4ccb4f3800fce8f6060bd023285a
176 Risk Score

Malware Insights

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

The PDF document impersonates a cloud file-sharing service, a common lure for phishing attacks. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting, suggesting an attempt to distribute malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://allytemp.ru/uplcv?utm_term=varaverpurai+in+tamil+pdf PDF link annotation
    • https://telewebmarketing.com/FCKeditor/file/zejopabimisadeguwivujebi.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/volalumumurubatax.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089094401205---59190978399.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad1f6e47605---dositozef.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b63d9fb8980---wadoxuxuvatemamasogijasev.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/7721ff855f65dd0faacc7e43c5bc6a74/77672821372.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5ff4c5643---gikodu.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/kasejo.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dafb678d02---biporijogojodebib.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/45735332788.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/145fcc2e3887895b2aafa56054219330/solinadefe.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f98193b85---bexorizijamijoxixekulux.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/5ebdd3f55b4a4873c2ac08dd5302847b/89248292136.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/nufeejf1fvvarkqr3qpvg59uj6/gejukibibobara.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16092d68b4daee---32167980890.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/14257309838.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/dimisewuba.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/61705859511.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160be4072cfe0b---59098255305.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00010b3c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10B3C 24484 bytes
SHA-256: 98be8d11f43ea2fcccae4531f53d2746985b26ddf52eb435a8082da775d030ad
font_00_sfnt_off0000fa22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA22 5036 bytes
SHA-256: 718a3e82ace490ec4c5ba949ffc05cda77706ada05ca2b748386348446c39d93
font_02_sfnt_off00013e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E4E 11192 bytes
SHA-256: 4bfd7896b1b79e248413e60f55aa02996041ea8bab325173bd54f4f002f508fe

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