Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6f91c0286e91cbb…

MALICIOUS

PDF

73.3 KB Created: 2021-09-02 12:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 87a7dc29560857e67b9d64969b8d80b5 SHA-1: 155d96eefa4715f71221a6e2821c78887af62508 SHA-256: c6f91c0286e91cbb8fe3e310a452e785beec6a65ba8f94afa6f56e009ea7f5ec
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://inwebjor.ru/uplcv?utm_term=anti+wire+tapping+law+pdf PDF link annotation
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b259040d4a---zoxuzujamamagitus.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094939e2598a---97241954244.pdfIn PDF document text
    • https://fajanav.com/aym_image/files/56680578721.pdfIn PDF document text
    • http://luberoff.com/userfiles/file/sejenavakasevovezigowawuf.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/f013eebaa9d82e1d45ad11b367135eee/kumaxagodupapixemawisoj.pdfIn PDF document text
    • https://kochitaxirental.com/ckfinder/userfiles/files/63712691483.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608660fb34ce2---42638841419.pdfIn PDF document text
    • http://highspiritsmusic.com/ckfinder/userfiles/files/doposukeragudubibukexo.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/jewamegak.pdfIn PDF document text
    • http://sziazsauto.com/uploads/files/vazevasejiduzotagope.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/21507094175.pdfIn PDF document text
    • http://sterenstein.ru/userfiles/file/vimepagosu.pdfIn PDF document text
    • http://becskeicsodajo.hu/admin/fck_upload/file/negokororipepizikefado.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/5af96aca154c764cbdd010cc249b7f33/21899571182.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/zosufu.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160790bc737b39---153283793.pdfIn PDF document text
    • https://kudamatsu.org/userfiles/file/monegif.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/30964586337.pdfIn PDF document text
    • http://physocare.com/Images_upload/files/45249445174.pdfIn PDF document text
    • https://karlholmbygg.se/UserFiles/files/34888553715.pdfIn PDF document text
    • http://7m-shop.com/userfiles/file/lujujafesanerizederuma.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/939947d1268545c7d11aaadb260d376c/49538032147.pdfIn PDF document text
    • https://nabil-doukali.com/userfiles/file/rapevonowetomizimivex.pdfIn PDF document text
    • http://thcsnguyenvanhuyen.hoaiduc.edu.vn/ckfinder/userfiles/files/bedizesakojop.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_off0000ba66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA66 10452 bytes
SHA-256: 848362d99e02083235bc712afe204f840487e4d84ba3dfd68f9564a7a24879aa
font_01_sfnt_off0000d218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD218 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2A 18296 bytes
SHA-256: 629a5c054da361e48c57f605abc19a4d3deb81d53387d5b19a267d50bf674ad8

Open this report in the interactive analyzer, or submit your own file for analysis.