Malicious PDF — malware analysis report

Static analysis result for SHA-256 7be98ae585d5cfa3…

MALICIOUS

PDF

76.0 KB Created: 2021-06-12 10:12:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 771c3f376ee6b2afcca27a8e41f21373 SHA-1: d17c3266c93ad9575bb04b3e9782274fe4d24add SHA-256: 7be98ae585d5cfa3298b64360366ea9b643e41bb8b23816da01d9d241acc3fbc
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 numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The presence of external URIs and compromised CMS upload links indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://catamma.ru/uplcv?utm_term=clay+craft+minecraft
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/gj19u3v59pnl44csmmb5o5adk1/magedujorulebamudipivef.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffbae63b47---61111518733.pdf
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/f2aad6b2d578f603ce8914ceca06283b/kavoxitiwaroturo.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099e705ca692---koradibapajonorikapofub.pdf
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c0aa432f5f2---segiwitufejodoginolaj.pdf
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/a1608cd9877007efadf27299bb670214/94651878160.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/894b015c887751efebe74e3a7c4d1b4d/52183427490.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f24b2621c5b8a95926debdceb2061fa5/bezokazada.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160943cae33fa8---42980464475.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe53436684---29658115296.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/87c96c8db1fc9f47d45556e6e7070645/dupaju.pdf
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/680ea5c4ab11569d2f39f4036dee990c/10636494222.pdf
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/db93e682a7dc4b9886a449f3fd6af32b/lonifesimifajoxawexix.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2a456d747---29496589486.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/juh3ci40fpq5o07oedt0hlbkru/zedisanuwoxutotal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec31.bin
2e6e274412b2929d7558026aa9ac3ba420466a9dc34904a436cfe858ff14e062		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC31 4856 bytes
font_01_sfnt_off0000fcaa.bin
52e766504fd4124ef0100054296877c90dfd83e383c942c9776487bc95f1021d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAA 11392 bytes

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