Malicious PDF — malware analysis report

Static analysis result for SHA-256 54240dc40d3aa18e…

MALICIOUS

PDF

79.8 KB Created: 2021-03-28 01:16:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8dd7728f7c6cb7b61fd1c289eb926a1b SHA-1: d53c181eb5f3ba74a0ecf14a44420f988c8e2178 SHA-256: 54240dc40d3aa18eb69bf5653e1c9d98fdfdc022cd1ac157f4d55ee2130d46a5
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, which identified it as a phishing trojan. The document body contains a deceptive title mimicking a search query, designed to trick users into clicking the embedded URL. The URL leads to zajinet.ru, which likely hosts a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/strik?utm_term=how+do+i+update+my+old+lg+smart+tv+apps
    • https://dovekawelefirim.weebly.com/uploads/1/3/4/2/134266448/d1abd8a1.pdf
    • https://cdn.sqhk.co/dasadogiso/mGnsdCm/avast_antivirus_update_for_windows_7.pdf
    • https://cdn.sqhk.co/jowapezo/bNjawih/28572922297.pdf
    • https://cdn.sqhk.co/nilamemiw/jrhitjf/75721942204.pdf
    • https://vumiluvitut.weebly.com/uploads/1/3/2/6/132696113/mupuvo-mobekopinefiwa.pdf
    • https://damemerivojed.weebly.com/uploads/1/3/4/3/134378109/9965384.pdf
    • https://cdn.sqhk.co/govupasuti/YieGjiO/wufipetijapam.pdf
    • https://modibidusez.weebly.com/uploads/1/3/4/0/134096811/9703200.pdf
    • http://varerafuvurine.22web.org/blue_netherland_dwarf_baby.pdf
    • https://garanokuwepo.weebly.com/uploads/1/3/0/8/130874617/lozejezefavuwe-tulisugokaxupex-xamobode.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://davojuke.epizy.com/tovuw.pdf
    • http://boledasedixe.rf.gd/regression_testing_test_cases_template.pdf
    • http://dulubuwukijel.epizy.com/rativonefuzokuxasewi.pdf
    • https://s3.amazonaws.com/remuv/56221853710.pdf
    • http://gejonutopufone.rf.gd/reading_comprehension_6th_grade_worksheets.pdf
    • http://vimevuda.rf.gd/dsl-2750b_firmware_upgrade.pdf
    • http://sulegezusaz.epizy.com/dologaboligo.pdf
    • http://givimuvupavu.epizy.com/tudeforanutimiduduka.pdf
    • https://ca39a19f-16f9-469f-ab0b-65ec0463b8d0.filesusr.com/ugd/cc9b97_3bfefbf9a7824cd7bdf1f6b66b462f28.pdf?index=true
    • https://43cb2d18-1589-43a7-b1c5-fe1278e1c76d.filesusr.com/ugd/370b54_8be77118d8e6482fa01721ab178cc0cc.pdf?index=true
    • https://s3.amazonaws.com/wazagidonux/how_to_adjust_tv_to_full_screen.pdf
    • http://gazusoketa.epizy.com/how_many_calories_in_a_dominos_medium_margherita_pizza.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed90.bin
6da223aeebbce19d1d31dc5972ca653dbc3f28d447ad0bb8a262c8ab689025fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED90 5268 bytes
font_01_sfnt_off0000ffa3.bin
21671e19262afb81265473645c4212ffa78701516c79798aa0f5e91d637bd1ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA3 10488 bytes
font_02_sfnt_off0001238a.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1238A 4324 bytes

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