Malicious PDF — malware analysis report

Static analysis result for SHA-256 a02e8aedfe83da74…

MALICIOUS

PDF

75.7 KB Created: 2021-02-26 05:49:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6f93107a65a7b6ee4b57211424bf45cc SHA-1: 70646fe4d0ad62e64fb82f7c14b35909a746ed97 SHA-256: a02e8aedfe83da74b3278c8d576ff9472ccd7cb4b89d7d5b361a595da9eaf8b1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically mentioning 'how to bypass icloud activation lock for free ios 12', suggesting a phishing or scam lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing campaign designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=how+to+bypass+icloud+activation+lock+for+free+ios+12 PDF link annotation
    • https://cdn.sqhk.co/bixatavafut/rhgWBhb/zesiz.pdfIn PDF document text
    • https://lupuxamugegudi.weebly.com/uploads/1/3/4/6/134623484/vivigosenavusu.pdfIn PDF document text
    • http://lumobumekola.getenjoyment.net/nutone_allure_ws1_range_hood_filters.pdfIn PDF document text
    • https://fojevatiseme.weebly.com/uploads/1/3/4/4/134400043/1e47e0e3e5.pdfIn PDF document text
    • https://cdn.sqhk.co/biposuba/hehgF3g/pupifilisizazugabanederuj.pdfIn PDF document text
    • http://vobonenagixavus.66ghz.com/how_to_convert_garageband_files_into_mp3.pdfIn PDF document text
    • https://cdn.sqhk.co/zibomevuguli/bgghiic/joratalakolefagijik.pdfIn PDF document text
    • https://fufifodex.weebly.com/uploads/1/3/2/8/132814348/vinaramavexiwixipo.pdfIn PDF document text
    • https://buzegiregusa.weebly.com/uploads/1/3/6/0/136082094/jelipudinezuxem-wogepigivozawot.pdfIn PDF document text
    • http://derilezin.sportsontheweb.net/78434511383.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/tupivutitedededemo.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/how_to_get_google_maps_to_update_street_view.pdfIn PDF document text
    • http://taranif.22web.org/blue_card_application_form_germany.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sugizujesel.epizy.com/mentor_calibre_manual.pdfIn PDF document text
    • http://kesazubajumat.rf.gd/how_do_you_reset_the_change_filter_light_on_a_samsung_refrigerator.pdfIn PDF document text
    • http://gaditerigasut.rf.gd/76055517252.pdfIn PDF document text
    • http://fomobiwudaz.rf.gd/74113004790.pdfIn PDF document text
    • http://mepogevotu.epizy.com/edit_text_in_file_free.pdfIn PDF document text
    • http://tapoloferazuziw.atwebpages.com/how_to_trade_on_metatrader_4_android.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_off0000ea22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA22 5752 bytes
SHA-256: b10bfb4eef82e7c613d6bb3021740c4651023030a6893b6abb8d4b0135f41e10
font_01_sfnt_off0000fde2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE2 10308 bytes
SHA-256: e4a9a0b7873cf1f7ede12a765c1cc81fddee906d92f8d9c56a5fe25b36f6cba6

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