Malicious PDF — malware analysis report

Static analysis result for SHA-256 e06e1049e593a243…

MALICIOUS

PDF

70.1 KB Created: 2021-06-11 08:17:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a9e0f91b7ab74a26e41122621e21be37 SHA-1: e42cc580a4908dd608ee516a914b0acf5bbf9614 SHA-256: e06e1049e593a243f3b5a456d485fd144c557f4f9787efb539c4cb712b0edd5d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The embedded URLs and document structure suggest a link farm designed to redirect users to potentially malicious content. The ML classifier also strongly indicated maliciousness.

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://huntic.ru/pbw?utm_term=macbook+os+lion PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452851/normal_60326272655b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474739/normal_5ffa5bc9f14ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444374/normal_5fd8995d585f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426269/normal_6067937cb7e08.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/c171c043-8296-44f8-9a2c-879bfb0f342f/how_to_treat_red_harvester_ant_bites.pdfIn PDF document text
    • http://mizunebapod.pbworks.com/f/pokemon_super_mega_emerald_rom_free_download.pdfIn PDF document text
    • http://lakebimutep.pbworks.com/f/what_does_midnight_mean_spiritually.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27e84544-28cc-49a0-92ad-6a6cb1d0995a/89560414612.pdfIn PDF document text
    • http://zutaman.pbworks.com/f/the_secret_schizoid_ielts_reading_answers.pdfIn PDF document text
    • http://joraxakegeg.pbworks.com/f/movie_trivia_app_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c47bad1a-4fa2-43bd-b26e-b55465ce1e6c/hunter_xc_instruction_manual.pdfIn PDF document text
    • http://fafevupu.pbworks.com/w/file/fetch/145030680/wanitusuro.pdfIn PDF document text
    • http://lomexalipele.pbworks.com/w/file/fetch/144500796/do_i_have_a_warrant_in_san_diego_county.pdfIn PDF document text
    • http://muxapoxowo.pbworks.com/w/file/fetch/144646194/defazipadumiliku.pdfIn PDF document text
    • http://pewamez.pbworks.com/f/kexotusapisosenizunef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db781705-fd0f-46b5-a008-abdbbbe12e6f/75695164402.pdfIn PDF document text
    • http://xifilipisi.pbworks.com/w/file/fetch/144413748/what_is_importance_of_family_planning.pdfIn PDF document text
    • http://lakiluxodev.pbworks.com/f/15257732724.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06c9efed-a27b-49db-ba7e-cab1fb668666/dedodovozepupapiva.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_off0000d6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CD 4908 bytes
SHA-256: 48c7013711482a0dc219e226f1021be0df11043c1b3ef864f7831e67ee3305b3
font_01_sfnt_off0000e7a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A1 10676 bytes
SHA-256: 426e1399aef885c877f468faee307a3cd24deda08f92b6ffec19ae837ce376f1

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