Malicious PDF — malware analysis report

Static analysis result for SHA-256 45c3d3efc64dd5bb…

MALICIOUS

PDF

76.3 KB Created: 2021-03-19 04:16:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5a98746b166bac0f3e8e0a5984b1a06f SHA-1: acb0bf12a0acb0a932e82cb3863e3cbf6aaacf8e SHA-256: 45c3d3efc64dd5bb8883b1fc9f54a5102b019b433f8a52de741b04016b9a10f8
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of external URIs and the ML classification strongly support a phishing attack pattern.

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://seumenha.ru/wix?keyword=baby+luigi+clothing PDF link annotation
    • http://tazikuruwuwozu.22web.org/pandari_bhajana_audio_songs.pdfIn PDF document text
    • http://rixipunanose.22web.org/is_verizon_router_worth_it.pdfIn PDF document text
    • https://cdn.sqhk.co/denalivek/g8yicVl/word_search_inspiration_app.pdfIn PDF document text
    • https://cdn.sqhk.co/kusedesomawa/gf3pyhs/46291934593.pdfIn PDF document text
    • https://cdn.sqhk.co/zawileveruz/7bONSUY/soccer_relegation_does_mean.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486772/normal_60246fc3eefd3.pdfIn PDF document text
    • http://bisipatelaloguj.66ghz.com/fat_rhonda_that_70s_show_actress.pdfIn PDF document text
    • https://cdn.sqhk.co/potebuso/Pgjgi80/31785267064.pdfIn PDF document text
    • http://wofonefa.iblogger.org/what_are_the_important_symbols_in_lord_of_the_flies.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388274/normal_5fc609448436a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://liroporuki.myartsonline.com/pozidavo.pdfIn PDF document text
    • http://gazugitub.epizy.com/kajawir.pdfIn PDF document text
    • http://bexumasifawej.epizy.com/banished_free_full.pdfIn PDF document text
    • http://sisuraregimu.rf.gd/android_tv_airplay_app.pdfIn PDF document text
    • http://futebowa.atwebpages.com/28325989168.pdfIn PDF document text
    • http://limazajot.rf.gd/silebezu.pdfIn PDF document text
    • http://pilulozames.epizy.com/20002907740.pdfIn PDF document text
    • http://juzobezakugov.epizy.com/99846832057.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_off0000ec8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8C 5076 bytes
SHA-256: a99fe1e045e0130baa6db7c7b4203da7e3cbfd0842782177c0ef7ca38aa173e4
font_01_sfnt_off0000fddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDD 11392 bytes
SHA-256: d782201f056062b835d6910d09aa3ef4985e48a32f8c3d0b28d0c002e6705d0a

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