Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bdc66a39992d336…

MALICIOUS

PDF

80.9 KB Created: 2021-03-23 06:21:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f329232d956599b09e7906338f60d642 SHA-1: dea6abcf20755ecfffd550b976d2284b804710f4 SHA-256: 4bdc66a39992d3360affe7b156ca1b1e6893750b5714f9f52870fd50d2a89f89
184 Risk Score

Malware Insights

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

This PDF document contains embedded links that redirect to malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly indicated maliciousness. The primary IOC is the redirector URL, which is likely used to host or deliver a secondary payload. The document body, though heavily obfuscated, suggests a lure related to an 'Apple TV remote guide'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=apple+tv+remote+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374986/normal_600d3b3bdff79.pdfIn PDF document text
    • http://feedbacrnz.space/armstrong_air_ultra_v_tech_80_manual6sx11.pdfIn PDF document text
    • http://sandwichhq.club/wuwuxorabiririxaowp87.pdfIn PDF document text
    • http://4kuhd.me/yard_machines_lawn_mower_140cc_manuals194y.pdfIn PDF document text
    • http://thrivewebs.com/29000136155v9fzq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487197/normal_60088368e661e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393483/normal_5fd04c4d82d9d.pdfIn PDF document text
    • http://rankingcoach-apps.com/how_to_schedule_roomba_675boqhh.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
    • https://s3.amazonaws.com/fadedosi/vulab.pdfIn PDF document text
    • http://lugejububowu.rf.gd/appsense_environment_manager_administrative_tools_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfa5e566-3fbc-43b3-8823-c96d9863b811/madeteradavak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ef09817-7f92-41f2-a5c3-d56b0fe62eb0/ripopabef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccfb70fd-b383-42a6-8d5e-f30fe6448414/ratukuriwolezenoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/how_to_clean_your_hot_tub_jets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/208028a0-5f6e-4220-8e8e-2934c22442ad/78429925691.pdfIn PDF document text
    • http://mogevotoda.epizy.com/zinunajanotopisitej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba41eb49-948c-4e3b-a581-51bea421e04f/71650522754.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f62f5126-64b4-454e-9ff5-3c16fd23df0a/philips_norelco_5000_dry_hair_trimmer.pdfIn PDF document text
    • http://limixumijegaf.epizy.com/vofelinaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5b26d8a-cd76-4d9f-82a2-4f0a67e68925/how_do_i_connect_my_cctv_dvr_to_the_internet.pdfIn PDF document text
    • http://fefisapuvekebi.epizy.com/programa_de_honores_ala_bandera_en_telesecundaria.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_off0000f4ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AB 4716 bytes
SHA-256: e3c0b298a235376d0f3a37f6f5a4ecfe0931be59239d37f298ba025c1047b4f3
font_01_sfnt_off000104c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C4 10484 bytes
SHA-256: 2776cddc006aa233197974736b6fafc81804ee05cc78d7ee518bbef53ab1e8ba
font_02_sfnt_off0001286e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1286E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3