Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d15aede805359a2…

MALICIOUS

PDF

83.4 KB Created: 2021-03-29 02:33:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f3086982a78dd60780e64b69086ba26b SHA-1: 4a46f2ba0ae4f4e7a0a540b2a5e6bb197a0aef90 SHA-256: 8d15aede805359a2b622990ad613e336e0ec410a2533c3641d57c44c8600f6c0
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing and potential trojan threat. It contains numerous links to disposable domains, suggesting a link farm designed to redirect users to malicious content. The heuristic indicating a security bypass instruction is particularly concerning, as it directly prompts the user to disable protective measures, likely to facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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/strik?utm_term=oracle+12c+r2+installation+on+linux+7+step+by+step PDF link annotation
    • http://bonifacy.site/7440573320wom0u.pdfIn PDF document text
    • http://prolac.ru/lakshmi_tantra_booky7kj8.pdfIn PDF document text
    • http://d2-club.ru/nuts_and_bolts_store_closing4iqu7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467576/normal_605d84eb934dd.pdfIn PDF document text
    • http://belkwigs.com/71407984632uzjpv.pdfIn PDF document text
    • http://rabota-plus.club/a_kingdom_of_dreams_movie3hgcn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392853/normal_601babc3c6026.pdfIn PDF document text
    • http://youtube-subscribes.com/sword_art_online_season_3_ending_mp3mtmeq.pdfIn PDF document text
    • http://vsspb.ru/65453117301qkuj3.pdfIn PDF document text
    • http://hookup681.site/bixafemokuwomusixorevajce61.pdfIn PDF document text
    • http://uscarins.info/jizasugav7zy0.pdfIn PDF document text
    • http://natur-bio.space/41598353633h7hpf.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/savonajiwebinimbofuv.pdfIn PDF document text
    • https://nijasofefovo.weebly.com/uploads/1/3/4/7/134719995/jirigugi.pdfIn PDF document text
    • http://lighterusb24.site/pojawesukemafixh185v.pdfIn PDF document text
    • http://magazinrf.xyz/sosalupizokizobinukucujwj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459057/normal_5fe12bb8d8f15.pdfIn PDF document text
    • http://ketadiets.site/jogesuwnscm.pdfIn PDF document text
    • http://fimewovoko.getenjoyment.net/pdf_editor_file_free_software_download_in_adobe_reader.pdfIn PDF document text
    • https://tajuwelaf.weebly.com/uploads/1/3/1/0/131071184/8be11f86944.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zesafemumibow.myartsonline.com/nugorakaditegobesuvesix.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_off0000f985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF985 5528 bytes
SHA-256: dad36d55b3ef88a9b14f8aa59927ceed4326738646cb13e9ed61a5a83c0a571c
font_01_sfnt_off00010c65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C65 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off000114f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F3 12640 bytes
SHA-256: 2a99dc03c18961e9b7f13e002b10244c205d63d2d039629c30c7397a39fded5b

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