Malicious PDF — malware analysis report

Static analysis result for SHA-256 15e04118bdb58503…

MALICIOUS

PDF

67.4 KB Created: 2021-02-05 11:24:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: edd4156ae8aa041c86790b92ec6d401e SHA-1: fee2313f6271d3a5a59223100459cf8375178fe7 SHA-256: 15e04118bdb585034aa28f82c83ae6306f7b895e2bef6946562bf5fe4aa15eb9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, suggests a lure related to 'city streetwear semibold font free', indicating a potential attempt to trick users into downloading malicious files or visiting phishing sites. The presence of external URIs and the link farm heuristic strongly suggest this document is designed to redirect users to malicious infrastructure.

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://leonvi.ru/wb?keyword=city%20streetwear%20semibold%20font%20free PDF link annotation
    • https://ludolukek.weebly.com/uploads/1/3/4/6/134699908/9929386.pdfIn PDF document text
    • http://copyrightnotice-ig.com/69729244093yq75f.pdfIn PDF document text
    • http://soinjaga.ru/church_funding_proposalijlky.pdfIn PDF document text
    • http://demask.fun/mufivd03m0.pdfIn PDF document text
    • http://digtalcaliper09.xyz/fujakuzokajunutupinx073.pdfIn PDF document text
    • http://eu-study.ru/basic_communication_skills_ppt_free9gmit.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/ig19ihi/logakur.pdfIn PDF document text
    • https://cdn.sqhk.co/vagewovupug/7jdhage/43777057260.pdfIn PDF document text
    • http://pixelbarista.com/misobemuvbbkx8.pdfIn PDF document text
    • https://cdn.sqhk.co/soboxuxafiso/5giochd/descargar_pixel_car_soccer.pdfIn PDF document text
    • https://regakoxunurur.weebly.com/uploads/1/3/4/3/134380337/8282ae174af2dd.pdfIn PDF document text
    • http://exemplpusj.com/la_teoria_del_big_bang_latino_descargarvstcf.pdfIn PDF document text
    • http://risurevisawibe.iblogger.org/zofowa.pdfIn PDF document text
    • https://xukotonaxi.weebly.com/uploads/1/3/1/4/131453431/kesuvum.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/eiaKj5u/vumidasubebunuduxalubik.pdfIn PDF document text
    • http://metazoaapc.fun/gina_wilson_2012_unit_4_linear_equations_answersh0co6.pdfIn PDF document text
    • http://kismykeitio.best/pexosapemuje9al4e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://galapeb.epizy.com/ephesians_2_bible_study_guide.pdfIn PDF document text
    • http://siverudatowu.rf.gd/types_of_adaptive_immunity.pdfIn PDF document text
    • http://foduwisidowej.rf.gd/23688654787.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_off0000cb01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB01 5292 bytes
SHA-256: a6e73356a3dfdc098a9793204734a805bbdc5812e207d0c633b5fdb52ba15fc9
font_01_sfnt_off0000dcfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFB 10284 bytes
SHA-256: 0499ac8b1c3f19e5e2878214215703e67cf32d8a23032818d219c7ef29d15293

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