Malicious PDF — malware analysis report

Static analysis result for SHA-256 d03f542800361476…

MALICIOUS

PDF

76.6 KB Created: 2021-03-30 06:40:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 781fc5a2c9b6e9798ece7b3ae98fba6d SHA-1: 5a98a7c63b8935f832e1f1d90a0d891d8e57c95c SHA-256: d03f54280036147624c6a9ffe27a8b78fb4e11093f579066327e119855684417
126 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing attempt. It contains numerous links to disposable domains, suggesting a link farm designed to obscure the true malicious destination. The document body, though heavily obfuscated, appears to be a lure related to a Kia Niro user manual, aiming to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/wix?keyword=kia+niro+user+manual PDF link annotation
    • https://cdn.sqhk.co/xavaxonad/fF8hgjh/tatagegajarosevatenebewo.pdfIn PDF document text
    • https://cdn.sqhk.co/vuritukupus/he66hge/34011811041.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401711/normal_5fe308642c50e.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/pChfzFD/3836305508.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381551/normal_5fe58a39e5f6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426421/normal_603b7dfa04fd8.pdfIn PDF document text
    • http://toxusuzom.mypressonline.com/sidituramilufedavazixi.pdfIn PDF document text
    • http://vaxisezawoged.scienceontheweb.net/96312708847.pdfIn PDF document text
    • http://lujuvudav.22web.org/virgin_mobile_answer_machine_number.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/jdUighe/gestion_de_pharmacie_hospitaliere.pdfIn PDF document text
    • http://vizexibidoxi.getenjoyment.net/zovufafi.pdfIn PDF document text
    • http://rimenofosufativ.22web.org/divergent_free_streaming_sub_indo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464534/normal_605979577f058.pdfIn PDF document text
    • https://cdn.sqhk.co/mujexoxa/ibBhdh3/htc_weather_widget_for_windows_10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ruzowedomox.epizy.com/26718304784.pdfIn PDF document text
    • http://baguzakanaso.epizy.com/jawalaruxeramugulogegaxir.pdfIn PDF document text
    • http://nerelikeg.epizy.com/76172371475.pdfIn PDF document text
    • https://s3.amazonaws.com/kimone/bsc_physics_syllabus_bihar_university.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/zoxuralosuradaguwukabiz.pdfIn PDF document text
    • http://remobufu.rf.gd/75511284687.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/70527148037.pdfIn PDF document text
    • http://sobegomogi.rf.gd/81813896746.pdfIn PDF document text
    • http://wawavaroxu.myartsonline.com/srimad_bhagavatam_in_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/nightingale_song_demi_lovato.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_off0000f05a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05A 4800 bytes
SHA-256: fcb83688f24bbf541d830ecacebd3d6f505f086f5a289beba8238e23be71aacc
font_01_sfnt_off00010092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10092 10724 bytes
SHA-256: ff2df3167f5ee179f76fc0ff70f820167239b493cf1f29f5ea2d763aaf09b8ba

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