Malicious PDF — malware analysis report

Static analysis result for SHA-256 7823161d27a111a3…

MALICIOUS

PDF

73.6 KB Created: 2021-02-18 11:44:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2a168bd374e6cecec5f4b133ccdde8c6 SHA-1: 792365cb9616c85e635a3af7f06f4384d126433c SHA-256: 7823161d27a111a30c374257ff91721e43df163d6d88dfdbf99fc508f254ab83
126 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure, likely leading to a malicious payload download or further redirection.

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://jottigo.ru/strik?utm_term=romeo+and+juliet+unit+test+review PDF link annotation
    • http://discount50it.pro/parkerbrand_52cc_petrol_garden_brush_cutter_grass_trimmer_manual4pekb.pdfIn PDF document text
    • https://cdn.sqhk.co/gujuvizaja/gifU6KH/iphone_x_forest_wallpaper_hd.pdfIn PDF document text
    • http://fuwenosod.iblogger.org/babasaheb_ambedkar_photo_2019.pdfIn PDF document text
    • http://fixmarker.fun/microsoft_launcher_app_reviews46uq.pdfIn PDF document text
    • https://cdn.sqhk.co/fusajovogi/VMphejc/ms_word_online_resume_templates.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/SjigfZK/tupupupolavuxedikinolefaw.pdfIn PDF document text
    • http://dress-russia.ru/car_racing_club_namesgmc0b.pdfIn PDF document text
    • https://cdn.sqhk.co/vobevufubito/kMhhnjh/toy_of_war_apk_1._4._1_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rojarasam/ceCgijf/41836571996.pdfIn PDF document text
    • https://cdn.sqhk.co/banamasuvaj/nGIujjG/caller_tune_app_download_apk.pdfIn PDF document text
    • http://kewisanoxiv.66ghz.com/pinivepogonon.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/ditiruz/zijopinifakatuxijiretino.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/logic_gates_and_truth_tables.pdfIn PDF document text
    • http://rorujuzolu.epizy.com/90326661055.pdfIn PDF document text
    • http://tafobinememen.epizy.com/html_editor_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/zuzofuban.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/wavunud.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE410 5204 bytes
SHA-256: fbb3902481f423c26cd50174418efadc2b909571a3fabcad02c8d4b1af6797d8
font_01_sfnt_off0000f5c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C2 10448 bytes
SHA-256: fab1023bb4c9e1dc5a682325e662301d7751806e127932b480ac7e7b811c4ae2

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