Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee2a9e2c5a866f2e…

MALICIOUS

PDF

85.0 KB Created: 2021-07-13 14:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5d036ad13bd76275c0e8e8198d599a4e SHA-1: 10117addfbab7fd1822530bace8faa9d9e8a7cf3 SHA-256: ee2a9e2c5a866f2e8624150bd277d0883c387fbe3d07d494e4ea6ffdaf39607e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm or phishing lure. The presence of external URIs and link farms on disposable hosting further supports its role in directing users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://synerhu.ru/uplcv?utm_term=pay+subsidized+or+unsubsidized+first PDF link annotation
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/844e5f7ebf6598755102b87d1984f56d/gukidebifijurotinaki.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c55d9560793---29051261751.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/1941210971.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6201eb19d1---xizekamom.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/17ae3b945193b159001ecd46822a0764/famugawagadimofuxerubu.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/bb470b318ea204590f3d785935558df5/xivepujumoparisukavex.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/i2r9s2mp6feoa174f9ngs8itj4/77231583044.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/b2c3201ae410675e20fb333290e3a938/74671223578.pdfIn PDF document text
    • http://pogservice.ru/userfiles/file/xinepijex.pdfIn PDF document text
    • https://mauspro.net/upload/files/87759037466.pdfIn PDF document text
    • https://elesud.it/img_pagine/file/84397492391.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/b930abdd9aa34a05e31407af016b0702/79949173062.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/c39d06d4b927dbf4228bd73d78112ab0/roxisisol.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/62572692562.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/b506887779478aa64da7272adbb7d2e6/bedaxavovigojudoso.pdfIn PDF document text
    • https://cavalier-hundezucht.ch/userfiles/file/22966451509.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/quvenpihtl83t4gqq6qm8p4qb4/niwidoguzapukikuzeguf.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f50cce0d2.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/df9ad989fee8084693f3fa72b6e9cd25/duzoxedaba.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/1865320058.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adcc9505956---36505962417.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/vufibabamoparupovuvuw.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/43346472477.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160812eda2dd75---83357939679.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b48e7d7f9---nodibafojafoboneve.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/netojaronafoga.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/1314f177c51bb837f38aa3e2bc41fb19/55474353564.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16072100348d34---68769620602.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_off0000e910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE910 10716 bytes
SHA-256: 0c2e31bad2d70ed5a230b674bc7e647708816279503631f8e8dccce93037241c
font_01_sfnt_off000101e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FB 16948 bytes
SHA-256: 1a5f2a2fe96d555ac1a820295a0c8f4a71da39f9130f1a006692b0ee2cc7a516

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