Malicious PDF — malware analysis report

Static analysis result for SHA-256 083205dae8cdd07d…

MALICIOUS

PDF

76.8 KB Created: 2021-03-23 04:00:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4add1cfab695bb8157efe3128de1ec31 SHA-1: 17fc2d0e150b6325b1412dca2e1c6e56dda8dc38 SHA-256: 083205dae8cdd07d38dcb4f8a87f91ad0af39051b7f90cef771ddcc0630a5490
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious. It contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to software downloads, suggesting a phishing or malware distribution attempt.

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://golowaki.ru/123?utm_term=age+of+empires+4++free+mac
    • http://zozavelomidabi.scienceontheweb.net/niwetujutar.pdf
    • http://vuzuwul.getenjoyment.net/mowakafavisoz.pdf
    • http://foyou.store/dell_optiplex_7010_dt_max_ramyr5wu.pdf
    • http://povisowalikim.scienceontheweb.net/befavinabi.pdf
    • https://cdn.sqhk.co/wibononuve/eu2jarF/cod_warzone_throwing_knife_kills.pdf
    • http://pajuwepubawip.sportsontheweb.net/microsoft_access_365_tutorial.pdf
    • http://pukebebizadolu.mypressonline.com/list_of_wh_family_words.pdf
    • http://dimopun.mywebcommunity.org/chilling_adventures_of_sabrina_book.pdf
    • http://xoxosedefoxadu.mygamesonline.org/vonokixiji.pdf
    • https://cdn.sqhk.co/mamozinuba/jijCzii/temple_run_gameplay_download.pdf
    • http://nufivuzelikonax.getenjoyment.net/feminist_literary_analysis_example.pdf
    • https://cdn.sqhk.co/xuxozowaki/2hd9hhl/rozed.pdf
    • http://idealicaitalia-official.site/drama_triangle_bookxc56m.pdf
    • http://grigolia-studio.ru/cyberpunk_2077_never_fade_away_find_the_mainframeao9ch.pdf
    • http://fosavaxenu.mypressonline.com/how_to_extend_fios_wifi_signal.pdf
    • http://okstore.info/bard_s_tale_trilogy_stats_guideo04z7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tigovatolis/fema_is_100_answers_2019.pdf
    • https://s3.amazonaws.com/wupagivoz/59682657289.pdf
    • https://s3.amazonaws.com/muwemivumazulax/zeladutazebizito.pdf
    • http://fazobelo.onlinewebshop.net/nsfas_application_form_2020_tut.pdf
    • https://s3.amazonaws.com/figidireki/zulelopo.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_off0000ee60.bin
3013f801ede8af3f8aa82c35d0a79be0a3fea11c08db8600d8ef9900e61c7ab0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE60 5380 bytes
font_01_sfnt_off000100a3.bin
d9635d5d98864762847e6fb8c80e23babf37683f10d5ba00ee0aa84ba4763cc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100A3 11124 bytes

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