Malicious PDF — malware analysis report

Static analysis result for SHA-256 364ed15ad1d834b8…

MALICIOUS

PDF

78.2 KB Created: 2021-06-26 20:15:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 28068160f3027462e65dbed4e4dc4cec SHA-1: f704549813d57495fbaa510bd12d4e092755be32 SHA-256: 364ed15ad1d834b81cdd7f3cd0bf64e41c59a40159c689cca9c9342b87f38591
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous external links, many hosted on compromised WordPress sites or disposable domains, 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 0.9958

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://crewmak.ru/uplcv?utm_term=red+beets+health+benefits PDF link annotation
    • http://foto-klub.dk/userfiles/file/bikowobuj.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/u6io0ordffpr1pcpbnmi72bviq/nezafulukujaluzuwunugopu.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/b4512766a7393848680174bfbf297847/10187649378.pdfIn PDF document text
    • http://woori-tour.kr/FileData/ckfinder/files/20210607_42EACA2FF6AF042B.pdfIn PDF document text
    • http://tai-group.com/upload/files/11874533963.pdfIn PDF document text
    • http://xycrusher.com/d/files/60652287689.pdfIn PDF document text
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/bokavofufesolimuwisefaroz.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/0f631a42890b1cbcbb31b0d96a814b7e/39676651178.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a28b86d3771---38573931015.pdfIn PDF document text
    • http://challendor.com/fckeditor/upload/file/nexomisokeji.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088a582cd60c---mikubotejukob.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/1d2011d70aeef5e4209c38ca84d0beb1/70554202045.pdfIn PDF document text
    • http://thaoduocquyhiem.com/userfiles/image/file/jipej.pdfIn PDF document text
    • http://www.lugashotel.com/data/editorfile/kemepexikedefof.pdfIn PDF document text
    • http://zionhillfirstbaptistchurch.com/clients/73368/File/89219521219.pdfIn PDF document text
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076003043d47---51067391155.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/932dc52b0c6dd77ee0c44cf8f8ff5487/zopugutawabemilezu.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/0bb15d724fa299e17679f61e12ca9e1f/23187049564.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/b8265ad2c7f69c6fa3d1baef19c8f58c/49105556226.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/34935422216.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/a8769bd0c794e75e1e84a7f3e55b3d31/dufimozoputowudupegepuz.pdfIn PDF document text
    • http://abwva.com/uploads/files/1865688860.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9c1370792---45534265160.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_off0000ce5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE674 10416 bytes
SHA-256: d3b46f0ee2e5b3c27a2f4ef38e70c4bb25e8ddf582eeb6e7160193d544b884ac
font_02_sfnt_off0000fdf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF1 16940 bytes
SHA-256: baf17b8de287d2fff02c0aaf3c1719d060450e6abd2028baf074c6d0d1746b34

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