Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e97570b64f17592…

MALICIOUS

PDF

80.6 KB Created: 2021-03-09 11:29:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: aabe8e896ca7cf5d7ce40686fc06436a SHA-1: 22dbb268d17382e892ee2419f1b7742a6ccfca42 SHA-256: 4e97570b64f17592275b1b4d0ee38167650af29de77d25ca336ab1d40f183763
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it's a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a URL that appears to be a lure. The presence of multiple external URIs and link farm heuristics further supports the malicious intent, likely to redirect users to a compromised site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://vilenefex.ru/strik?utm_term=how+to+read+a+branching+tree+diagram PDF link annotation
    • http://wewogokuwidu.mywebcommunity.org/muzawoxibisipuboxaxusop.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/EhhguB3/pisabuserixexibipuzi.pdfIn PDF document text
    • http://juponuziwotaga.mywebcommunity.org/73726346917.pdfIn PDF document text
    • http://muldwych.com/306712541309mqgk.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/mpmb_spell_sheet_generator.pdfIn PDF document text
    • http://gexopidikimo.mygamesonline.org/siwakuwamaxexubar.pdfIn PDF document text
    • http://weinmvc.net/pokemon_diamond_walkthrough_bulbapediao2rrc.pdfIn PDF document text
    • http://laxobigoribozog.22web.org/26100937498.pdfIn PDF document text
    • http://trokot-tonirovka.online/argumentative_essay_activities_for_middle_schoola2ciw.pdfIn PDF document text
    • https://cdn.sqhk.co/vujaderaz/mibgidk/51798042919.pdfIn PDF document text
    • http://oneplusonemain.xyz/honeywell_rth2300_rth221_wiringlqk83.pdfIn PDF document text
    • http://shoop-fo.ru/beselezoxaxomlbzxx.pdfIn PDF document text
    • http://sanasesuj.iblogger.org/how_do_i_setup_my_linksys_range_extender.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://juwebud.epizy.com/vobaluzifo.pdfIn PDF document text
    • http://xoradodi.epizy.com/97520796166.pdfIn PDF document text
    • http://lakitedovu.rf.gd/how_to_draw_anime_full_body_female.pdfIn PDF document text
    • http://kuwulanunemitiv.epizy.com/tablet_pc_samsung_galaxy_tab_4_7.0_8gb_t230.pdfIn PDF document text
    • https://e6676b24-921d-4f57-8fca-beda98688f3c.filesusr.com/ugd/144d27_be7b179d645442be94bf2f3b3303ae24.pdf?index=trueIn PDF document text
    • https://1682489e-d94b-4f22-b6a6-c8ecb623ca2e.filesusr.com/ugd/5f226e_7adab93a682d4532b77d13b3e2e0e6ff.pdf?index=trueIn PDF document text
    • http://vorenetizufumuj.rf.gd/vevelotopobez.pdfIn PDF document text
    • https://07e0a16e-b77d-475b-b724-88bbaedb347c.filesusr.com/ugd/8e9e2f_5f48fef01ea341a9a2dbe20585579c41.pdf?index=trueIn PDF document text
    • http://zekarevuwo.epizy.com/jnc_8_guidelines_for_htn.pdfIn PDF document text
    • https://8d5bcf17-53f2-4f21-b585-7a27aef14131.filesusr.com/ugd/7baf93_6e42436a9a924e2abc00e0feb99d68c6.pdf?index=trueIn PDF document text
    • http://xozelabudizi.epizy.com/gelimolajokifaruzonakezo.pdfIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/how_to_describe_sunset_in_word.pdfIn PDF document text
    • http://dagilupakov.rf.gd/59388640870.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD4 5124 bytes
SHA-256: 9065d409bee4e2653a0b8345f810fe42f7e72557476343e8ff52989643c07681
font_01_sfnt_off0001011a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011A 11132 bytes
SHA-256: 7a801b61f36bcd96b483e21870ad261403a4613e215ad8477ace370bb70141f7
font_02_sfnt_off00012689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12689 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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