Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ea87bef512983dc…

MALICIOUS

PDF

78.9 KB Created: 2021-03-09 03:42:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e233981f3847372bd45d74798abc72db SHA-1: 1a54004de466ee9c6f18e2a26cad3e6d46e39f6a SHA-256: 1ea87bef512983dc751450ea462c6b81342cf8231952e5c43e8d418450663db4
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs pointing to disposable or suspicious domains, indicating a likely phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a link farm designed to redirect users. Although no scripts were explicitly extracted, the presence of external URIs and the ML classifier's high confidence score point towards malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/award?keyword=list+of+sheep+breeds+pdf PDF link annotation
    • https://vilotirupoj.weebly.com/uploads/1/3/5/3/135328316/xiwopoxe.pdfIn PDF document text
    • http://autokenn.com/weather_report_for_charles_town_wv0u6xk.pdfIn PDF document text
    • http://jiwabozaxexe.mypressonline.com/wodebugajabatafilarerapem.pdfIn PDF document text
    • http://wobafobigo.mywebcommunity.org/57445794627.pdfIn PDF document text
    • http://zoosalon.org/story_of_beauty_and_the_beast_in_hindi1e4ph.pdfIn PDF document text
    • http://zizowifajazabor.22web.org/sedona_method_course_download.pdfIn PDF document text
    • http://natlab.ru/89681612981eqk1x.pdfIn PDF document text
    • http://onlajn-kassa.ru/beetalk_apk_3._0._0rk6if.pdfIn PDF document text
    • http://sajiwurejedetu.sportsontheweb.net/vuzikedaz.pdfIn PDF document text
    • http://nonly.xyz/masubavinufisefegesixiq680f.pdfIn PDF document text
    • https://ferijivoko.weebly.com/uploads/1/3/5/3/135327637/sijifibenakowot_jagekijinoze_lenufutomap_fimajifek.pdfIn PDF document text
    • https://matexofetuboso.weebly.com/uploads/1/3/1/4/131453592/e5d9dcd4892f.pdfIn PDF document text
    • http://alisaborodaenko.design/apache_jmeter_tutorial10tog.pdfIn PDF document text
    • http://ejqy.com/bodatoxagl9oa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://49550882-97ce-44db-a38b-6e383bb81149.filesusr.com/ugd/062c90_56c0fa4abb1d4244b15ef90337782ea9.pdf?index=trueIn PDF document text
    • http://sigozezigi.rf.gd/yardman_mower_parts_manual.pdfIn PDF document text
    • http://bizewegomakak.rf.gd/arerey_manasa_song_sensongs.pdfIn PDF document text
    • http://lorajazibosiner.epizy.com/18827402526.pdfIn PDF document text
    • http://podoremekuzepo.rf.gd/worksheets_for_letter_s_for_preschoolers.pdfIn PDF document text
    • https://88749095-6fd7-453f-8e8a-15b48fe47dd1.filesusr.com/ugd/e4d7df_009c35ce34af47f8aee1a12e1bfebb0a.pdf?index=trueIn PDF document text
    • https://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_7d3dcb0d0bf84ae0a247d9d7cc0119de.pdf?index=trueIn 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_off0000f97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97E 4968 bytes
SHA-256: fc4dfa6f0abb2080172a1041863abb4f22771559cdfefc8ade8e39c4f448694b
font_01_sfnt_off00010a5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5A 10492 bytes
SHA-256: 9af82561b4ce522f95d3aa157ef63fc80a9abfc89ecac218de4298836df0e929

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