Malicious PDF — malware analysis report

Static analysis result for SHA-256 66570e901c7e8176…

MALICIOUS

PDF

76.0 KB Created: 2021-03-09 13:07:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 023092fedd45a10789202b01574e15a8 SHA-1: d6d337e072132bc06c7b510078f583bab6b895ef SHA-256: 66570e901c7e8176db6516dc96af9454fde180c2a019e398a68079d158be767e
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely for phishing or scam purposes.

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://midufefew.ru/123?utm_term=ageless+male+performance+pills PDF link annotation
    • http://winoorama.space/tchaikovsky_symphony_5_horn_solo_sheet_music6qnn6.pdfIn PDF document text
    • http://ilkertr.shop/crochet_pattern_for_super_chunky_woolwk6by.pdfIn PDF document text
    • http://desajegurake.scienceontheweb.net/carry_on_luggage_dimensions_frontier.pdfIn PDF document text
    • http://amandeepsadyora.com/cours_anglais_debutantqufuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447267/normal_602b9c0244b5d.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/34118702172.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419820/normal_602eebec98c21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469623/normal_60249ff3b7941.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/novifamigot/24311788767.pdfIn PDF document text
    • http://medozazi.epizy.com/dyson_dc59_motorhead_disassembly.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/jepena.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/tamil_melody_hd_audio_songs_free.pdfIn PDF document text
    • http://fofilelajisemap.rf.gd/don_juan_castaneda_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/circumference_and_area_of_circle_worksheets.pdfIn PDF document text
    • http://xofatodifukox.rf.gd/marley_and_me_trailer_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72d994f0-731c-4311-9c99-87899173c339/24547677345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab75f626-984b-4cca-b096-c8cd057817de/concert_ukulele_chord_chart.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08D 5324 bytes
SHA-256: 38f3c332a07ef366f20afdeb3219571bda82c9a86aa8f661c7a7c21703f3169c
font_01_sfnt_off0000f28f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28F 3032 bytes
SHA-256: 7cd57f509d1020d9185c92908e5daccf654e7ef6f19bff6b18e1c2e0f9a97552
font_02_sfnt_off0000fef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF8 10540 bytes
SHA-256: 6d1a0feeb91df0df0af632059d4ded1e1dcac6272f32b3cb8555108830442961

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