Malicious PDF — malware analysis report

Static analysis result for SHA-256 58ea7e6611ca0984…

MALICIOUS

PDF

84.3 KB Created: 2021-07-01 15:13:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 02dcdb03fd19a1f8d9bd9f8ac898efcc SHA-1: c4f6ed9f7b423819cf7c944f372b022799cca89b SHA-256: 58ea7e6611ca098410a185dbcc126d91eb8a77c7daf62a75b773ffc798851f9f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing lure, primarily by embedding a large number of external links. Many of these links point to compromised CMS upload directories, suggesting an attempt to host malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://infrive.ru/uplcv?utm_term=pinched+radial+nerve+in+elbow PDF link annotation
    • http://www.puhito.hu/uploads/japijaruw.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/kugenusubizegopetukiful.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/b2f6a48ae9e05d6cd96402840fcfc399/29699214606.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160869ab8f0216---pugewuwefamom.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160897c025c9a1---92845839518.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/6d2da47956f24792fd7cc936e22fcb0b/lugiratoxopezogibo.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd0096d845---86331280851.pdfIn PDF document text
    • http://jikaramen.com/uploads/files/rurebok.pdfIn PDF document text
    • http://czechdidgeridoo.com/admin/upload/file/lujoserolakatodovapu.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/redolazuluxuzusofi.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d89575eb985---tarakukolaxodarasusafev.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/bofinoxubisovobisazogujo.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/31139909467.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/wamemisutefarojelufuwejis.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/cd4ufvp0ep15d5dg91iv8kt4ke/guwulerizaza.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a68f4e684---72486847399.pdfIn PDF document text
    • http://asokmontridental.com/userfiles/file/72197115663.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c13d0e62d---mexopusa.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a41e1ba4304---40928251994.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/3a54e8c59fd7d6b764f6ea5250e6e17d/rotafenotoripon.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0eadd13b9---45418042606.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/833e5a15e0f1d917695d4dc7b2b9c248/ronobuluvotoz.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_off0000e974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE974 10496 bytes
SHA-256: 40f61087b4e89006f6edb0501ccc4ca509bbc8ee6bd82be5752508cba2b78794
font_01_sfnt_off0001012f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11941 16552 bytes
SHA-256: a54c6d5f4cdba3ba4c0fa38167389c239b2752a1f1725a74ef050777a4f33271

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