Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e2a0731d0a0a5d8…

MALICIOUS

PDF

91.1 KB Created: 2021-05-24 23:07:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f397642ae3e6e274e321a84833d28c8 SHA-1: f710318c204235203ab5037d2b1c135b31cb17cb SHA-256: 1e2a0731d0a0a5d882e78a84c469e9be9c16afbe56ac58e6196036a062bef3d7
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting it's part of a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to a 'Directv remote guide button not working'. The presence of external URIs and link farms indicates an attempt to lead the user to a potentially harmful site.

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://queure.ru/uplcv?utm_term=directv+remote+guide+button+not+working
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a88a2727534---52324869393.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/d1803d84465a51681c1dbd6e66030819/fudajoxedanomoxasoluvanuf.pdf
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/b35efc17fd7f6be99fccca714c78c172/kewanabokaloxozeruve.pdf
    • http://cateringkieuan.com/uploads/userfiles/file/sogapuwalajesuli.pdf
    • http://monkey-do.net/userfiles/file/pasawutagebikimaniwezubo.pdf
    • http://stardentalcare.org/userfiles/file/76088351911.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076fc2ad51b6---kixevifufexolu.pdf
    • http://naturallabs.de/userfiles/file/60713522951.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607532e6134f6---98106626978.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16091e89b80ebb---83082411170.pdf
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/8f0e858eb789d4d1f3daa0c4a363b1c6/2995653261.pdf
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609482e0b1dc8---45006034902.pdf
    • https://www.propertyadvisersaustralia.com/wp-content/plugins/super-forms/uploads/php/files/d8754a16f292f05c9d4f82c78a28443b/senopixupevufivubo.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/4pqd6gsl9o7u43smrar5c3tpmk/16222372902.pdf
    • https://q-web.ro/wp-content/plugins/super-forms/uploads/php/files/nn2kejbafrb3asg4u0t7ej3793/wuzazukorezo.pdf
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/cstpou96f46li5tl4sepg12ip5/41923584321.pdf
    • http://yilip.net/userData/board/file/82656080534.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4b2b773f7---87653023093.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_off000125b6.bin
37dc47254a55b7c9833eea3a8f1f7c406a0f28e2d31746328e24968992c6e309
pdf-font-stream PDF embedded font (sfnt) at offset 0x125B6 5192 bytes
font_01_sfnt_off0001376b.bin
848978d2852860c2f7419d7ad0333924d61ef94ee2597d0fce828b1a5a00b76d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1376B 11744 bytes