Malicious PDF — malware analysis report

Static analysis result for SHA-256 c35be07223aceff7…

MALICIOUS

PDF

76.8 KB Created: 2021-06-23 08:35:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0450513c75a48930d8beb4d2419589cb SHA-1: ad5acc07a1ee5201111682f788503543efd3b2b4 SHA-256: c35be07223aceff79d1b69214d0d297c76055f3ed0a82e1d5fc0fc46d51b6391
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to various compromised websites, likely intended to trick users into downloading a secondary payload. The presence of external URIs and a link farm on disposable hosting suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://garglob.ru/uplcv?utm_term=gba+download+for+ios
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606d04996e9ce---56094549254.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cba1c69c42---45144678881.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/7e88ff88a9b61ce5400f6d414263d769/76054948798.pdf
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/86cfc08979b59b09487940b59a073343/21767511893.pdf
    • http://travelport.pl/userfiles//file/ranim.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/85d179168bc547412a038226f206ba29/784410810.pdf
    • http://humboldthighclassof79.com/clients/1/19/19f040aad945c40a0acbd79abd3dc6cb/File/13799997312.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080da027eb85---vifutelizoba.pdf
    • http://jjinline.org/file_upload/file/demirovikit.pdf
    • https://himalayanthailand.com/image/upload/File/desafupuzajasin.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706c9fbefa7---goxovaxadagosepil.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3aaf282db---rebopumaruwiboragobuser.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6f2f8d794---pudanemelukejadenekig.pdf
    • http://www.ecostroyservis.ru/File/mexaxubafakixubu.pdf
    • https://kuepancong.com/contents//files/wabasodetagovimukara.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4da.bin
9cd780a7ac92febf801a7c7ed43ed3caf916b199bc4eb59e8876aac81f979bcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DA 4756 bytes
font_01_sfnt_off0000f50f.bin
0d6bb69f289e865e8d170e039ea925a33cbb5d27ca1bbd53059f3340ad714581		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF50F 10440 bytes
font_02_sfnt_off000118b1.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118B1 4324 bytes

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