Malicious PDF — malware analysis report

Static analysis result for SHA-256 be0e5a1c058230c0…

MALICIOUS

PDF

80.3 KB Created: 2021-02-18 03:45:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: a8acf83a67d87ffea3d3850f1c50663f SHA-1: f1506dc90f61f9a25c8211b1da0feb1c5ed51835 SHA-256: be0e5a1c058230c0bd7610746243f932014f702df8b294b4c5a66d577cb1873a
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. It contains numerous embedded URLs pointing to external sites, suggesting a phishing or malware distribution scheme. The presence of PDF-specific heuristics like PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM further supports its role as a lure to potentially malicious content hosted on disposable domains.

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://jacksth.ru/wix?keyword=electric+charge+and+static+electricity+worksheet PDF link annotation
    • https://nebenumepidenok.weebly.com/uploads/1/3/5/3/135307723/befotene.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/ighjpgj/1603399391.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/pghLhb6/stack_cubes_storage.pdfIn PDF document text
    • https://xomikevogonenoj.weebly.com/uploads/1/3/4/7/134743799/ea96dfa.pdfIn PDF document text
    • http://rejuxipo.iblogger.org/99909554558.pdfIn PDF document text
    • https://luwujapi.weebly.com/uploads/1/3/4/7/134751522/c2020.pdfIn PDF document text
    • https://cdn.sqhk.co/toridezoxiko/qjdSdid/weather_forecast_seattle_smoke.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473035/normal_5fff0739c63d7.pdfIn PDF document text
    • http://gekalam.22web.org/google_play_games_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421464/normal_6029c7716c548.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484355/normal_60053394c31f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366354/normal_5fface996e7e2.pdfIn PDF document text
    • http://monongzhlh.space/achievement_powerpoint_templates_freeu15l5.pdfIn PDF document text
    • https://cdn.sqhk.co/xagunetoxa/jijhfmz/baseball_trading_card_shops_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368975/normal_6018a1d7dd078.pdfIn PDF document text
    • http://hh666o.site/categorising_love_ielts_reading_answers_mini_ieltssfuhx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447906/normal_5fc9e3b19bf9c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nalakakowim.epizy.com/what_is_the_period_between_the_old_and_new_testament_called.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_off0000fe3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3F 5416 bytes
SHA-256: b52ec687dbe88af4d36c417405616ec7f426453f71bae211bec7a90265f6b6e0
font_01_sfnt_off000110ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BA 10208 bytes
SHA-256: 00d4b4e73364478e027436285794d91ed3881e9c1207f15dcb76743d090a4b24

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