Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ecc293d41de6e2…

MALICIOUS

PDF

93.0 KB Created: 2021-07-18 02:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 8999af088c917aff2560adf8fbc34511 SHA-1: 939055491b620ca788959fc645e1fc6f7f135dbe SHA-256: 09ecc293d41de6e2e4269505352588bd6c516a675e2581853267d866e029fe91
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to websites, many of which appear to be compromised WordPress installations. The primary purpose seems to be directing users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

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://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/a9622153bf17159161db2e53115a10ee/76810516520.pdf In PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9318eaa1b---rovubelovirunejixa.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160edba7107fe5---58956859585.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/p4bjfibabblekm337avmtep1o4/juvepuvile.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072969a23549---bomanogefanarupom.pdfIn PDF document text
    • https://epgeptech.hu/ckfinder/userfiles/files/xipejarofojupakuwaboxo.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/malis.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/38ad4ec56fe717d46119138b027d3ce4/lokofufezupikuraxunupoze.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/sebevebadalu.pdfIn PDF document text
    • http://ldbell1965.net/clients/85689/File/48586246680.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/nanagabiropukomijuzosemi.pdfIn PDF document text
    • http://abwmercury.com/uploads/files/pulimakunasikofokuk.pdfIn PDF document text
    • https://bharatbiodiesel.com/userfiles/file/11672665828.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/7e4bab45e903832740c5130a264d35b8/20993811607.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/fad0fcf11b45c97d28ba559024b8e00a/21428405309.pdfIn PDF document text
    • http://rowanfamilyreunion.com/clients/28915/File/tedadowudar.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afaaab473bd.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/30a9d47af1052fffd3a4fef38126bc0e/wigobabegutotomire.pdfIn PDF document text
    • https://thuaphatlaihanoi.net/uploads/files/54495693686.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc810f1faff---xamizuvewojamizaluvivoduw.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/0fc31b3c03aff45f8f86f1bf619734ae/163589996.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/664045f374b0070b8552b11c1ade22a3/4537777946.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b9be5f588---65935997700.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=our+god+is+an+awesome+god+mp3PDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F4 10972 bytes
SHA-256: dbdb5e01e423a03926b050aa47d06004fc7d540bd191d989594b7bbdee4b8b4c
font_01_sfnt_off0000fd3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3D 16228 bytes
SHA-256: 11c5a07d087146020572b41e3c25cf6f3fd7b709257038c787216a38c3b0495f
font_02_sfnt_off0001131b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1131B 2616 bytes
SHA-256: a6f43c21bd9a7f777abf5b43b7405ecb34b367fa1b6d3540cc8b41468c9b621b
font_03_sfnt_off00011e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00013656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13656 17896 bytes
SHA-256: e50f4385d2ccaf73733f6378096f165eb228fbc743e0bf80ccc939b796a61680

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