Malicious PDF — malware analysis report

Static analysis result for SHA-256 1acc33dc138089e3…

MALICIOUS

PDF

73.1 KB Created: 2021-03-21 01:05:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2a64fb46656d04544efa7928dbac834 SHA-1: 18579a0f0ec1ac6d2f8b62fc75c2284e95006397 SHA-256: 1acc33dc138089e3e7ff788bef6ecdf5bf0e6cd55b40eaa061500f0088b4d05f
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with a primary suspicious URL being https://mezovuduw.ru/wix?keyword=dau+pha+thuong+khung. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests the PDF is part of a link farm designed to distribute malicious content. Although no scripts were explicitly extracted, the PDF structure and embedded URIs strongly suggest it's designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/wix?keyword=dau+pha+thuong+khung
    • https://disadaniti.weebly.com/uploads/1/3/4/4/134463451/rakilevop-soxeze-tekewizizun.pdf
    • https://pexevirojaloko.weebly.com/uploads/1/3/4/8/134882405/4699728.pdf
    • https://zejanedigerexig.weebly.com/uploads/1/3/4/7/134757062/peribowotixize.pdf
    • http://gilumesu.mypressonline.com/vox_ac15hw1x_footswitch.pdf
    • http://vurejowug.mypressonline.com/fodifuvemokazasewibalavo.pdf
    • https://jolofoni.weebly.com/uploads/1/3/4/0/134042869/d94b5f4cc3fe2.pdf
    • http://fiwetud.scienceontheweb.net/49502736369.pdf
    • http://zugemenelil.medianewsonline.com/paron.pdf
    • http://gifinibufenatar.medianewsonline.com/what_are_visual_examples.pdf
    • http://punavuvipufov.sportsontheweb.net/risc_v_tutorial.pdf
    • https://fatatovol.weebly.com/uploads/1/3/4/7/134707957/pekozarijik.pdf
    • http://kozugufasuroti.mygamesonline.org/historia_de_la_decadencia_de_espaa_canovas_del_castillo.pdf
    • http://manidat.sportsontheweb.net/alter_ego_plus_4_b2.pdf
    • http://xeberok.getenjoyment.net/46655950384.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bifadiwuwileji/chore_chart_template_for_couples.pdf
    • http://wewuwoxije.epizy.com/wesojorurefiwaso.pdf
    • http://buwanizun.epizy.com/rovisusajedet.pdf
    • http://miganuvag.myartsonline.com/kujodazutotesokotavupubi.pdf
    • http://walaratetev.epizy.com/kubota_bx25d_attachments.pdf
    • http://xazopufegi.onlinewebshop.net/how_to_view_data_in_excel.pdf
    • https://s3.amazonaws.com/xupimaral/wezojuwiri.pdf
    • http://gurabagoderes.atwebpages.com/kuruverifo.pdf
    • http://jigisasamupor.onlinewebshop.net/can_age_of_empires_2_run_on_windows_10.pdf
    • http://gixejemazob.myartsonline.com/54916799523.pdf
    • 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_off0000d73d.bin
998500e7da79cbde446947d84f78298d1589c60d25748cef697f466af42829ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD73D 4836 bytes
font_01_sfnt_off0000e7be.bin
98b30fc1d6a2561dd1fa3f6291ea2e58716fafe3d79d15ddf9f4d42b9d4dcf52		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BE 21508 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.