Malicious PDF — malware analysis report

Static analysis result for SHA-256 97981dc5fd091364…

MALICIOUS

PDF

75.6 KB Created: 2021-05-01 11:14:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23314b8d7f9483e92745cd9ce88914ee SHA-1: 741f40b9fa3a291f34993b2936ac334f77fe9a83 SHA-256: 97981dc5fd09136441d44a2da50ca5be49e67f6d9fee069ce289dd6357d08f18
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting a link-farming or redirection scheme. The presence of embedded URLs and the overall structure strongly suggest this document is designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://ponafet.ru/strik?utm_term=how+to+learn+futures+trading
    • http://wulutapebime.getenjoyment.net/xojiwa.pdf
    • https://cdn-cms.f-static.net/uploads/4483855/normal_600c3d678a295.pdf
    • http://kixurox.getenjoyment.net/minijofixekotetal.pdf
    • https://ledugatikafaf.weebly.com/uploads/1/3/4/6/134693541/betipudop_pukat.pdf
    • https://cdn-cms.f-static.net/uploads/4487208/normal_6056a3c5bc2d8.pdf
    • https://cdn.sqhk.co/dijowasedop/aicBThg/18256908895.pdf
    • https://kaferafodi.weebly.com/uploads/1/3/0/7/130775544/lipajesupi.pdf
    • https://wusitezuredov.weebly.com/uploads/1/3/5/3/135314125/zijuniz_poberumoranem_dutufexuloziga_lazokajozilejag.pdf
    • https://static.s123-cdn-static.com/uploads/4424405/normal_5ffca9f5b1aa2.pdf
    • https://jonimewogil.weebly.com/uploads/1/3/1/8/131860125/pufelusozopawobebig.pdf
    • https://cdn-cms.f-static.net/uploads/4367275/normal_605a3e102d0a4.pdf
    • http://nikibolerobika.getenjoyment.net/foripajagelede.pdf
    • https://cdn.sqhk.co/lewulula/jhd1pXe/donijile.pdf
    • https://cdn-cms.f-static.net/uploads/4416661/normal_604ab1da2e1ec.pdf
    • https://cdn.sqhk.co/ladesajisama/fgjjcjl/fowojajukeweporuperape.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/46ec27d6-4b3b-4388-a05f-9928eb97cd7e/24631577107.pdf
    • http://livutogugusal.rf.gd/sakshi_epaper_sunday_book.pdf
    • https://uploads.strikinglycdn.com/files/51e20dbc-2a10-4dff-82c7-15f9fb950cb2/esv_womens_study_bible_hardcover.pdf
    • http://minivenema.atwebpages.com/algebra_worksheets_grade_7_with_answers.pdf
    • http://sirepirujigega.epizy.com/dinamicas_de_presentacion_en_linea_para_adolescentes.pdf
    • http://laletanegimiw.epizy.com/neruxazupi.pdf
    • https://uploads.strikinglycdn.com/files/1ad4780e-2024-449a-9842-dc90c625abda/honeywell_quietcare_humidifier_instructions.pdf
    • https://uploads.strikinglycdn.com/files/cb2e1e76-be74-4cb2-919b-f6ff18f1ff5d/80388769102.pdf
    • http://lowuguja.myartsonline.com/64135349321.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_off0000ec79.bin
8334fcbd1bba1149e7546eec5b2948cfef9fc7cc70dd882d316908b056492127		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC79 5128 bytes
font_01_sfnt_off0000fe0a.bin
9821b6609fe9bdc23800157e53f812558bdcbe178ad49e3421495acd5d3b3463		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0A 10120 bytes

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