Malicious PDF — malware analysis report

Static analysis result for SHA-256 19cd5f4bdd364311…

MALICIOUS

PDF

103.2 KB Created: 2021-01-28 15:40:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 299845f0139ccd272dbbf6852ab85f09 SHA-1: d61b8a772644ea8d86b3b96aff16b5fc931694d3 SHA-256: 19cd5f4bdd364311fee7b62441665154b6cdc65659d360326aea00febe16cb95
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to a suspicious domain, which is likely used to host malicious content or phishing pages. The document body, though heavily obfuscated, suggests a lure related to a 'Live2d cubism tutorial'. No scripts were extracted, but the presence of external URIs and the overall malicious classification strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/123?utm_term=live2d+cubism+tutorial PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446789/normal_5fd5f831e5769.pdfIn PDF document text
    • http://granitmetrospecstroy.ru/head_basketball_championship_mousebreakeraspqj.pdfIn PDF document text
    • http://slimitalia.space/93391612802q0rod.pdfIn PDF document text
    • http://electorat.org/24904186948twxvy.pdfIn PDF document text
    • http://aov.one/402173423146kmp8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465403/normal_5fcc1a15c4bb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447271/normal_5fddff07168c0.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/jegche6/the_king_of_chess.pdfIn PDF document text
    • http://winfreeiphone.xyz/protesters_block_traffic_san_franciscommy1c.pdfIn PDF document text
    • http://pefujogori.iblogger.org/98565206991.pdfIn PDF document text
    • https://cdn.sqhk.co/mujowofapubi/jfCEz4K/final_freeway_2r_android.pdfIn PDF document text
    • https://cdn.sqhk.co/xaripisi/dIwgghB/etisalat_business_appointment.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390328/normal_5ff97c2b1f90c.pdfIn PDF document text
    • http://dirupomavi.iblogger.org/63152322240.pdfIn PDF document text
    • https://cdn.sqhk.co/jetirivotu/Jshijjd/evacuation_plan_for_fire_in_school.pdfIn PDF document text
    • http://sreview.online/guidestone_insurance_loginsc6s6.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/jivala/brackets_for_ubuntu_16._04.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/cisco_ip_subnet_calculator_free.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/19808618686.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/muzamemirutu.pdfIn PDF document text
    • http://buzuvemujogumob.epizy.com/genonuximal.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE26 26568 bytes
SHA-256: b87a79e902fe2bd270e96b050681fd18bfe467fe73ca37e11c0ffecc41cbdf98
font_01_sfnt_off000141a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141A3 5360 bytes
SHA-256: 62ab52040dbb827779cc743a91f7a59a869d0fa5579f431eee11d9387287beec
font_02_sfnt_off000153cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153CD 11016 bytes
SHA-256: 6506698879d8ccc28e4db7c4625b4b3d855aef29ed1c92c5ed16d8766b224583
font_03_sfnt_off000179a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179A8 16096 bytes
SHA-256: 61761e6c71fdd980502ce8a3a8cbf9590216241eb9eabe72fdf309a1c23cd3c2

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