Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e4a8aba6d01652f…

MALICIOUS

PDF

78.4 KB Created: 2021-03-10 14:28:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a888dcc4f9f6a0b979dc503a823bc01b SHA-1: 1c86fdf6e2ad38926bab5964e287571e1058f166 SHA-256: 9e4a8aba6d01652fb7a67f5dcdc12bd4c92a20a572a523ae4d98dc363ef7132f
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external domains, suggesting it functions as a link farm or phishing lure. The PDF structure and embedded content, despite being heavily obfuscated, are consistent with malware delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/strik?utm_term=rules+of+interpretation+of+contracts+in+india PDF link annotation
    • https://cdn.sqhk.co/molivovuki/hEwjH4c/kyrie_eleison_violin_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/hhCAgiv/pujakilalevalozaxo.pdfIn PDF document text
    • http://mudikovarew.mygamesonline.org/kenmore_top_load_washer_disassembly.pdfIn PDF document text
    • http://daimontimur.org/mamubige4s70.pdfIn PDF document text
    • https://cdn.sqhk.co/pesamelez/ifgfhLg/fajefibifilurozilu.pdfIn PDF document text
    • https://puvawimorewafiz.weebly.com/uploads/1/3/5/3/135383948/wagomoti.pdfIn PDF document text
    • http://joblanc.xyz/1024416393j5n5g.pdfIn PDF document text
    • https://biwawidojimu.weebly.com/uploads/1/3/4/6/134648839/d19d61bcd.pdfIn PDF document text
    • http://goproonly.com/university_physics_with_modern_physics_13th_edition_solutions_free_downloadl17wg.pdfIn PDF document text
    • http://wwnews.site/66713452941qunsf.pdfIn PDF document text
    • https://wojopegoguw.weebly.com/uploads/1/3/4/6/134690206/nekuz.pdfIn PDF document text
    • https://dexuganepo.weebly.com/uploads/1/3/1/6/131608037/53fe3f5f.pdfIn PDF document text
    • http://vijevejumozugim.sportsontheweb.net/cara_main_game_atlantic_fleet_lite.pdfIn PDF document text
    • http://dikagowoxi.sportsontheweb.net/adorno_culture_industry.pdfIn PDF document text
    • http://leftoutclub.com/bodyguard_movie_all_songs_pagalworld._com24cek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lupixopuvir.onlinewebshop.net/aldi_application_2020.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_off0000f4bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BF 5156 bytes
SHA-256: 5ba75d3d33cf135073d8f5610a81a0fcc4bd7c2bf016186beb182ce965272304
font_01_sfnt_off0001065f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065F 11244 bytes
SHA-256: 261670ef925542057aec3e69c039274456f331b611eddf3d008ae5b82b2b55c3

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