Malicious PDF — malware analysis report

Static analysis result for SHA-256 11a8a4e0357fb5a6…

MALICIOUS

PDF

74.0 KB Created: 2021-04-04 08:18:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9e80f1f6a652bf4c16ec61a04a3a9ad6 SHA-1: e2891caa1d9858d94e49d9e63b5df821b5573879 SHA-256: 11a8a4e0357fb5a68396496c5e353ebcf89d9a8b02edf6c95d59bbf0cb1a549d
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one specifically pointing to a domain associated with phishing lures ('lozipotod.ru'). The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains metadata suggesting it's a PDF related to 'arbitration law', likely a pretext to drive users to malicious sites.

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
  • 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://lozipotod.ru/123?utm_term=arbitration+law+pdf PDF link annotation
    • http://tophomework.space/calculus_early_transcendentals_sullivan_miranda9b0c6.pdfIn PDF document text
    • http://mini-cam1.club/sevegikedoxujukikolebepofu9er6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://944456f3-75eb-4cd6-bbfd-656b3713ada1.filesusr.com/ugd/2c8d66_2785cfe719924cc784e8ec01d087e26a.pdf?index=trueIn PDF document text
    • https://c546c886-5aa5-41cc-813f-4ed3e146772c.filesusr.com/ugd/b3e52d_14cace59651448909c849e783f1df31d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dec2483-81ec-4239-a491-39a8e31a8d1b/how_is_leave_allowance_calculated.pdfIn PDF document text
    • http://varoniwarovez.rf.gd/war_ambience_sound.pdfIn PDF document text
    • http://fivamoxopel.epizy.com/aulad_bhojpuri_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/reliability_and_validity_of_research_instruments.pdfIn PDF document text
    • http://fulabal.epizy.com/adjective_adverb_and_noun_clauses.pdfIn PDF document text
    • http://jafedave.epizy.com/38501854623.pdfIn PDF document text
    • https://fc060a1e-8c1d-4b7d-bafd-75f79d4c6355.filesusr.com/ugd/c0a468_630ce346b8d2438c9dbcaf7948e34312.pdf?index=trueIn PDF document text
    • http://kovawasokagi.epizy.com/how_to_start_a_textual_analysis_essay.pdfIn PDF document text
    • http://tijunejo.epizy.com/ethiopian_reporter_amharic_version.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/banca_internet_provincia_telefono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee27fbf9-6c57-4b5e-88e1-dd07ef336db8/10097879268.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/xadinafito.pdfIn PDF document text
    • http://rizaraj.rf.gd/oecd_fragility_report_2018.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e47f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47F 5080 bytes
SHA-256: d69c164914426bfe5545a9ec0e278acfe6a36e1f5043b87cbd15baec5da09e7a
font_01_sfnt_off0000f5e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E8 10824 bytes
SHA-256: 60f13ae26865615a1ae7d5a6f1fabf532dd3e8fe5f63ddf09306caa2b9f5bc80

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