Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b0c7df0bf1b1b82…

MALICIOUS

PDF

76.8 KB Created: 2021-02-22 07:31:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 654bf61fe5b61e7ee7d777ac4b849b5f SHA-1: 18c2c7a88f9f51014cd8489a53586348e4f43860 SHA-256: 1b0c7df0bf1b1b828cfe364f138a4c9e627f27e9387d00c6f6ee74e6f7d72cf8
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting services and are likely part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to exploit users by directing them to potentially harmful websites.

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://maypoin.ru/wix?keyword=four+letter+words+beginning+with+the+letter+c PDF link annotation
    • https://febufovita.weebly.com/uploads/1/3/4/3/134324671/dekigevajifefilisal.pdfIn PDF document text
    • http://tuxiwos.iblogger.org/nottingham_bluecoat_school_uniform_shop.pdfIn PDF document text
    • https://murexaxinafol.weebly.com/uploads/1/3/4/4/134456221/vuwutimeladoba_gulusifude_wovazanorenezu_takuvana.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/hiSjiCM/zombie_birthday_party_supplies.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424951/normal_6018a522bfd7a.pdfIn PDF document text
    • https://jesisime.weebly.com/uploads/1/3/4/8/134886507/49bec8e3a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422909/normal_5fc865248c57e.pdfIn PDF document text
    • http://zomuregunaradu.iblogger.org/vidmate_app_old_version_2._5_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412164/normal_5ffef8df3affa.pdfIn PDF document text
    • https://fuwefepitebu.weebly.com/uploads/1/3/4/7/134709748/xetisaputatid.pdfIn PDF document text
    • https://segamivudafipem.weebly.com/uploads/1/3/2/7/132740242/legerosam-guzoful.pdfIn PDF document text
    • http://fufetaka.iblogger.org/santoshi_mata_ji_ki_aarti.pdfIn PDF document text
    • https://cdn.sqhk.co/vaminika/dhdibSY/juzomebeziwumew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367310/normal_5ff0320970da8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://metologedafux.epizy.com/frustration_aggression_theory.pdfIn PDF document text
    • http://tudexobus.rf.gd/bolulewatexuguw.pdfIn PDF document text
    • http://jasosuwer.epizy.com/25696514071.pdfIn PDF document text
    • http://gujugune.rf.gd/the_green_inferno_imdb_parents_guide.pdfIn PDF document text
    • http://patazave.epizy.com/jidatewuvumapejaxigo.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_off0000e2af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AF 5060 bytes
SHA-256: 02fd7dc05b53c0629dc5bceccc75f60be4a61cace3fb2f1f2482987866312788
font_01_sfnt_off0000f3f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F0 10492 bytes
SHA-256: 7ce8cb6a6b47e2b98f527654eaa71965c6eadec202d2ecb97a6834d815e3d2fa
font_02_sfnt_off000117b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B4 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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