Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bd597da2982b484…

MALICIOUS

PDF

83.9 KB Created: 2021-08-20 10:46:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: df5c109600e23c442f79999912fab86d SHA-1: 71ad932485b7e8ca75bf7f2f723a706721af2b07 SHA-256: 4bd597da2982b4844d9f6b33990a8755d4f4a8141115999cc3cea2a86a980156
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised websites, identified by heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. The ClamAV detection and ML classifier also flagged this file as malicious, specifically as a phishing trojan. The embedded URLs are likely used to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://mojahotels.com/ckfinder/userfiles/files/sawiwijozalar.pdf In PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/54d1f0b53ccf99c496150069520752c2/tamadugurixisuje.pdfIn PDF document text
    • http://isvpro.com/custom/files/xipiwed.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f1ca880f3---zudaxefikutafumenepaxoj.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///17196724181.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070e9904d145---pumugukifozolixarukuwa.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/fezibir.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/3bf825c289d90497b5f4a14e3b794bb7/39232777536.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/lajasobevinonuk.pdfIn PDF document text
    • http://www.uniformsolutionsforyou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdd952e88b---60508011553.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16083340f3d251---felifa.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/53457502916.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/65de4084a0aa1ee52cc4684e901a6aa2/25554511253.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/toferujifawisunapomiper.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611a12bec042e---ravile.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/f6bfaad74b227680d98136caf738471d/43142501968.pdfIn PDF document text
    • http://fqcycpa.com/jingkelun/userfiles/files/20210708042834.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609a32627bb97---5622079147.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/98d7e88cec43e17ae5f730f1caeb30ba/83118849019.pdfIn PDF document text
    • https://fid-data.fr/app/webroot/uploaderfiles/5432786760.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/4i2phsp49abfjacnjlbcpphlnq/40207144891.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097a8b31bdf6---71418502344.pdfIn PDF document text
    • http://cezanart.com/userfiles/file/57758010990.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=relaciones+toxicas+libro+pdfPDF link annotation
    • 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_off0000e10f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10F 17576 bytes
SHA-256: 46391a46779d09d79f27c61380e7b378eb343f3d8370b20b188cd4fb0b5b52e9
font_01_sfnt_off00010dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DE 10900 bytes
SHA-256: bfe29b21f93caaf65b07dff65949e5381f03d1a4b658ca1c96eb36e661590677

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