Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e61a70958e5c80…

MALICIOUS

PDF

70.3 KB Created: 2021-02-19 01:33:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 17538171a5bad5bae486288cb2eafa3b SHA-1: 7032efd17da4ea4711bb44c73b998192aba40c88 SHA-256: 89e61a70958e5c80069f2147333d458ed1ccefaced721854e8a1d42e3fc15a0d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, suggesting a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to deliver malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/wix?keyword=identify+subject+verb+and+object+worksheets PDF link annotation
    • http://scandisvet.ru/42658792300e9dbo.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxeromewime/ghrjjge/monster_energy_supercross_2_game_tips_ps4.pdfIn PDF document text
    • http://qwert-ita.fun/rorewevefm6t4n.pdfIn PDF document text
    • http://weex.info/faxebije649pw.pdfIn PDF document text
    • http://domavera.ru/8093396351oe66p.pdfIn PDF document text
    • https://cdn.sqhk.co/leloxoreje/Sjejfhf/free_streaming_tv_online.pdfIn PDF document text
    • http://mufapalufupezas.iblogger.org/debezab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455387/normal_60281c478e9c4.pdfIn PDF document text
    • http://golosa-spasibo.ru/pc_building_sim_blue_screen7h6mv.pdfIn PDF document text
    • http://detonic-italia.website/navbar_android_developerrjuio.pdfIn PDF document text
    • https://cdn.sqhk.co/jawutuwek/bNhdehd/bass_booster_music_player_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453741/normal_5fd376b1ddb8b.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/ikfKibV/it_current_events_2020.pdfIn PDF document text
    • http://demask.space/famenujarajupiwatuds6940.pdfIn PDF document text
    • http://xesubixuj.iblogger.org/fuwudedobupekaludujogil.pdfIn PDF document text
    • http://kersita.space/38795755209y0bpy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sonowodiguvab.epizy.com/esv_study_bible.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_off0000d5de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DE 5548 bytes
SHA-256: b7d3a101a71b388daa55a8a5903087bc01c2926c85647284bbe59c4abb9ed7f5
font_01_sfnt_off0000e8e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E0 10204 bytes
SHA-256: 5b077661b2ea2ce0051f699dbe47cf73d38e0e83c0e2c823d21fb2485425b5d1

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