Malicious PDF — malware analysis report

Static analysis result for SHA-256 d89d8e3ce5c71592…

MALICIOUS

PDF

77.7 KB Created: 2021-04-02 06:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4e2f1d06c5d28d7266eae387bcfa6752 SHA-1: 55c892aa548d98330900ecdd8321910cd7026b85 SHA-256: d89d8e3ce5c715929661b45c1dc6eaa52430e26eb14d7106478370c64062ecba
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/strik?utm_term=ejemplos+de+dialogos+informal PDF link annotation
    • http://iranianvc.com/kajikifafepejibowrexr.pdfIn PDF document text
    • http://natiral.space/fotos_de_caritas_felices_animadas6425z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377377/normal_5fdbbff2330cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409621/normal_600e0563bb8a7.pdfIn PDF document text
    • http://copalofa.site/amman_devotional_songs_ringtones_freepesbm.pdfIn PDF document text
    • http://avit0.cc/historia_del_pensamiento_politicongk9p.pdfIn PDF document text
    • http://poroda.site/25576508803ap3zl.pdfIn PDF document text
    • http://mishabelle.ru/aristotle_political_thought4cdtn.pdfIn PDF document text
    • http://meine-gebuhrenfrei.com/resumen_del_libro_la_revolucioncitac4djr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd987f0d-8908-4ece-95e3-18ae5dc76847/kisokofodorewexivujuxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e86ff6c-381c-40b8-8f2f-ef1e867fbc3d/dolls_house_ibsen_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aec9eb61-727f-4bfa-b977-793abe6afd6e/how_often_to_change_trane_furnace_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97450779-4233-492b-aaf7-f2f4f8d52468/xekizun.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/beautiful_now_zedd.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/32335969736.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c4f2501-0501-44f2-a695-4209226ed2b7/kezabitemerixovi.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/a_different_mirror_ronald_takaki_audio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23e48ff4-b5d3-41e5-be9a-b95067db5af9/2904941411.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/olympus_om-d_e-m5_mark_ii_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78c72525-337a-4765-92f2-f90f9d342b89/why_was_the_lincoln_douglas_debates_so_important_in_the_lead_up_to_the_civil_war.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_off0000ef0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0A 5396 bytes
SHA-256: cefd8848ed92333ef756b3de7cf431a1a7188c6a042ef4864ae303e9c6070a6d
font_01_sfnt_off00010152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10152 12340 bytes
SHA-256: 6c4f5ca2afa6ad6e0e80bf13b38487d305491041555771df95b1fe06609fc7a3

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