Malicious PDF — malware analysis report

Static analysis result for SHA-256 c15ab9392f4b98ed…

MALICIOUS

PDF

95.6 KB Created: 2021-03-12 21:10:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4c869a39e07185a86a38552d89865cf3 SHA-1: e456431fc082743d9f2b7412c7b12814f4960e4d SHA-256: c15ab9392f4b98ed1c3a90ad61facfab4f73c746a70ae8d7a6b2dfd0b72ba3d2
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains, indicating a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the PDF structure and URL patterns are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/strik?utm_term=program+management+office+charter+example PDF link annotation
    • http://nogezat.iblogger.org/liquidity_risk_management_guidelines_mas.pdfIn PDF document text
    • http://jojenulowivot.22web.org/azhage_azhage_ethuvum_azhage_song_free.pdfIn PDF document text
    • http://bigakeka.iblogger.org/81165640238.pdfIn PDF document text
    • http://kukukoboda.22web.org/fantastic_mr_fox_original_book_cover.pdfIn PDF document text
    • http://dotasif.iblogger.org/larexu.pdfIn PDF document text
    • http://tekijanimawov.22web.org/piwit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://livajurusurex.epizy.com/can_you_make_banana_bread_in_a_bread_machine.pdfIn PDF document text
    • http://jejomozukiro.rf.gd/57672490497.pdfIn PDF document text
    • http://revipopeguxasaf.epizy.com/zeresotakipekisiz.pdfIn PDF document text
    • http://dujupopo.epizy.com/pufikolexe.pdfIn PDF document text
    • http://wigugagekubog.rf.gd/reading_ielts_tips.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/jovubarovaxepexanofitida.pdfIn PDF document text
    • http://somituxebo.rf.gd/zemenatagomij.pdfIn PDF document text
    • http://vubeduwamop.epizy.com/15511286080.pdfIn PDF document text
    • http://jomozaredid.rf.gd/exponential_inequalities_worksheet_kuta.pdfIn PDF document text
    • http://fafaxuz.epizy.com/a_classical_introduction_to_modern_number_theory_free.pdfIn PDF document text
    • http://wegakitiz.epizy.com/asset_er_roblox_rhcloud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dba198d-d776-4328-a3ab-6febe1ee6be8/gagivojumuxuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3443a88d-d3a5-473b-a828-aedb79dae3c9/vulobijuf.pdfIn PDF document text
    • http://numumodi.epizy.com/apostrophes_for_possession_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/abirami_anthathi_lyrics.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_off00013a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A31 5320 bytes
SHA-256: 1765c997929c61e307334e128ec5aa1200148634854e029cde74e8ef3a767f92
font_01_sfnt_off00014c30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C30 10748 bytes
SHA-256: 2cf178bbfb2ae200187c5f607bf3d6bdbee3f6a8e4c50e56b010227ac3f50660

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