Malicious PDF — malware analysis report

Static analysis result for SHA-256 972d072eb210679f…

MALICIOUS

PDF

68.8 KB Created: 2021-03-28 08:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 855589b45c303a25ba3f0d0cf23a537c SHA-1: 9b9bc3fbcfa7b1f224f7110771b628fe3e7e7391 SHA-256: 972d072eb210679f871676e86fec144231024d89022766e30a59dc6de93ae672
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, with one prominent URL pointing to a site that appears to be a phishing lure related to land registry forms. The presence of external URIs and a link farm on disposable hosting suggests an attempt to redirect users to malicious content.

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://mezovuduw.ru/123?utm_term=land+registry+form+tp1+guide
    • http://birunirako.22web.org/elementary_number_theory_calculator.pdf
    • http://boxijogirexu.medianewsonline.com/space_4d_cards_free_download.pdf
    • http://mubositesene.mypressonline.com/complete_guide_to_asperger_s_syndrome.pdf
    • http://rudexikuritisi.iblogger.org/39870891487.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rovevofi.rf.gd/siwowo.pdf
    • http://fobupozomorefiw.epizy.com/pencil_caricature_software_free.pdf
    • https://s3.amazonaws.com/suxuzubojut/1407043144.pdf
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_df02caf980c4431ab92501ccc4f93262.pdf?index=true
    • https://s3.amazonaws.com/vasofirida/azkoyen_palma_h87_manual.pdf
    • https://s3.amazonaws.com/vosimalume/cashflow_101_board_game_free.pdf
    • https://601bead5-a720-4f65-98db-62fe2a42cb91.filesusr.com/ugd/0e52b4_fab66ebdbeb84ea79500fec31301b50d.pdf?index=true
    • http://rowovotufuru.epizy.com/spotify_apk_pro.pdf
    • http://sedoguzod.rf.gd/fedex_international_shipping_commercial_invoice_template.pdf
    • http://fotopokidag.epizy.com/first_birthday_invitation_card_template.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0f0.bin
eceb8eaa1c1706ddedbe14c8b9ade4ef33ad52f90eff706c06c08dc7bd5c523a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F0 5424 bytes
font_01_sfnt_off0000e362.bin
6a0d24f507c669a1924c27231e5ab0c74ceaa00a2942d93ed64c1a065958205b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE362 10348 bytes

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