Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2ad3813c16fb722…

MALICIOUS

PDF

73.3 KB Created: 2021-03-25 12:15:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdf9833b8713398d84b6dcdb48be0768 SHA-1: d1ae9d5277cc645709b207f22c6a2e773f66a568 SHA-256: b2ad3813c16fb722d57c5eab4e17d57d19873b1a78531ab12e673da2343be177
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'mezovuduw.ru', which is likely used for phishing or to download a secondary payload. The PDF structure itself does not contain executable scripts, but the presence of the malicious URL is a strong indicator of a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=majora%2527s+mask+songs+3ds
    • https://static.s123-cdn-static.com/uploads/4391620/normal_5fffe7c5b3833.pdf
    • https://static.s123-cdn-static.com/uploads/4497688/normal_5fec6923910a2.pdf
    • http://rivozuzeno.mywebcommunity.org/my_whitfield_pellet_stove_troubleshooting.pdf
    • https://cdn.sqhk.co/xedomobedusi/ajbgiji/71959147831.pdf
    • https://cdn.sqhk.co/vozeseseber/oifijie/revukerinirez.pdf
    • http://silujokiz.mypressonline.com/xobilepimikenidikarotex.pdf
    • http://suzofovolavuk.scienceontheweb.net/21319004317.pdf
    • https://cdn-cms.f-static.net/uploads/4483873/normal_603078afbb6a9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kewuxejikiwe/natenutifo.pdf
    • https://s3.amazonaws.com/xipavir/excel_budget_template_free.pdf
    • https://s3.amazonaws.com/jasadavebaga/jodorowsky_s_dune_script.pdf
    • https://s3.amazonaws.com/tulosa/bizuwogufetuwimejuxupoki.pdf
    • https://s3.amazonaws.com/bidemewufa/jamiroquai_blow_your_mind_sheet_music.pdf
    • https://s3.amazonaws.com/tikoweravisixu/nuzozaboluzuwizetivobegof.pdf
    • https://s3.amazonaws.com/savifin/6664075025.pdf
    • http://fogovulosuzan.onlinewebshop.net/a_delicate_balance.pdf
    • https://s3.amazonaws.com/xefezesebusu/formulas_de_area_y_volumen_de_cuerpos_redondos.pdf
    • http://guseboses.atwebpages.com/rezudedezo.pdf
    • https://s3.amazonaws.com/napoledunadigo/les_miserables_25th_anniversary_o2_dvd.pdf
    • https://s3.amazonaws.com/rimepusox/53612575383.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_off0000e089.bin
b1b0b48025bc63dfe798038db17378e810fd76a59389ae42b14abea7281b68bd
pdf-font-stream PDF embedded font (sfnt) at offset 0xE089 5456 bytes
font_01_sfnt_off0000f31c.bin
8b5f583fb6be59f437aef7c259b0b4f76a4f15acd2d0b42adc4e4b50b645e5a3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF31C 10728 bytes