Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ebcd9b6758d398…

MALICIOUS

PDF

70.4 KB Created: 2021-04-07 02:40:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ebde187253212638233b1d4d389ea764 SHA-1: cf8f371a04897031d90e9fcc2162b18e221cb31f SHA-256: 32ebcd9b6758d3989b29059f24d7cdb2013a0d62ba2b18055a89272a06895174
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with at least one pointing to a suspicious domain (vilenefex.ru) that is likely used to host malicious content or phishing pages. The PDF structure and embedded links suggest it's part of a phishing campaign or a downloader for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/wix?keyword=aacn+procedure+manual+for+critical+care+pdf PDF link annotation
    • http://rowexusaje.mypressonline.com/83048890832.pdfIn PDF document text
    • http://mowogaw.mypressonline.com/arqueologia_prohibida_gratis.pdfIn PDF document text
    • http://nomenowunesazoz.scienceontheweb.net/breadmaker_recipes.pdfIn PDF document text
    • https://sexanugujox.weebly.com/uploads/1/3/4/2/134266496/dc3eb958f0f1e34.pdfIn PDF document text
    • https://pizavanaxuvilu.weebly.com/uploads/1/3/5/3/135386491/paguguvewoj-muvawaz-pirukuratiw.pdfIn PDF document text
    • http://remastacer.com/browning_a5_review_forum7kfbm.pdfIn PDF document text
    • http://xbet1.fun/vfs_global_schengen_visa_application_form_france3sf9u.pdfIn PDF document text
    • http://sevastopol.sale/living_religions_a_brief_introduction_3rd_edition_freefxpag.pdfIn PDF document text
    • http://simopuvoramawu.mywebcommunity.org/45082781426.pdfIn PDF document text
    • http://vasakuso.sportsontheweb.net/noxodisamil.pdfIn PDF document text
    • http://lagulesuko.medianewsonline.com/57267885180.pdfIn PDF document text
    • http://wipunemobak.mygamesonline.org/45758578879.pdfIn PDF document text
    • https://dudabiwik.weebly.com/uploads/1/3/4/3/134354119/zosut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f6c228e-2a65-4bed-b7cd-5f9993e44850/digital_photography_for_beginners_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f4c305b-59f9-4491-b058-581a2364f210/garmin_gps_60_price.pdfIn PDF document text
    • http://woxikajir.myartsonline.com/43974733045.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ff845f5-098b-46dc-8145-ef8e2c56147d/wikenoraligiwatajaboduw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/761eb7ad-8dc8-4a3b-8585-a92eb022abd1/samsung_rf26hfendsr_aa_water_filter_location.pdfIn PDF document text
    • http://lopafulobitap.atwebpages.com/bedexip.pdfIn PDF document text
    • http://pasulupumorowim.myartsonline.com/88985045975.pdfIn PDF document text
    • http://palelezugob.onlinewebshop.net/dokumen_amdal_pt_indofood.pdfIn PDF document text
    • http://kuxoxokazutuv.myartsonline.com/lazojofix.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d64b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64B 5112 bytes
SHA-256: 1b5fcfa29658034933a58d1694f56bd9241f284e59343f2564345055f1c16c9f
font_01_sfnt_off0000e79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79D 10792 bytes
SHA-256: 6c70ed437146b81ee7c2c892fc51a6b3098d8d41ca750881adfe0454065e0796

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