Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a73a365b25f10e4…

MALICIOUS

PDF

79.2 KB Created: 2021-04-30 23:10:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 466b9ab41eefed0fba3df54d1e8d5559 SHA-1: 2ce71e71f94aacb0d2204078946f39652fa957f9 SHA-256: 9a73a365b25f10e4b57e3da9de6680650017829a9bd9a2bffa5cd6842968a9a9
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/strik?utm_term=stem+cell+research+pros+and+cons+essay PDF link annotation
    • https://cdn.sqhk.co/retakabif/fififgi/13833351176.pdfIn PDF document text
    • https://cdn.sqhk.co/tolebilu/dlPgcD5/free_online_games_for_kids_no_download_unblocked.pdfIn PDF document text
    • https://wujupeduluruwuv.weebly.com/uploads/1/3/5/3/135316277/3769286.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/61151747053.pdfIn PDF document text
    • http://miwewumexurigan.sportsontheweb.net/fuzolixixumubij.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxuduxexi/nUiaijz/angry_birds_2_level_47_boss_zeta.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/hsiehc8/viral_news_urdu_breaking_news_update.pdfIn PDF document text
    • https://dademogu.weebly.com/uploads/1/3/4/5/134591834/rivil.pdfIn PDF document text
    • https://jiresuzava.weebly.com/uploads/1/3/4/7/134706808/lemesibujotu_samilu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kudogal.rf.gd/english_words_with_silent_letters.pdfIn PDF document text
    • http://zuzimadatunukag.rf.gd/32715733288.pdfIn PDF document text
    • http://xijisunuma.rf.gd/learn_english_in_30_days_in_marathi.pdfIn PDF document text
    • http://bebojivim.myartsonline.com/essay_outline_graphic_organizer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfa40359-093d-4d2f-8b01-cb286132013a/xiwefup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c9442eb-27e6-4a6a-b5b1-9cbdd3fbc65f/94003089730.pdfIn PDF document text
    • http://titudisejofixu.epizy.com/tuberculosis_history.pdfIn PDF document text
    • http://vujupedalu.epizy.com/barab.pdfIn PDF document text
    • http://zuxulabawiba.rf.gd/dedicated_clean_ballast_tanks.pdfIn PDF document text
    • http://varezekavon.rf.gd/does_taco_bell_still_have_5_box.pdfIn PDF document text
    • http://xiwakutev.epizy.com/amityville_horror_book_free.pdfIn PDF document text
    • http://xewaditina.epizy.com/salilaxirokarajunota.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_off0000f7e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E2 5520 bytes
SHA-256: c7d3e70bce44a54fefff278b762da116031bef70785843ed8930fbbc4818902f
font_01_sfnt_off00010a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7F 10920 bytes
SHA-256: 1889d9927597310b6adb2a7544d64402f376b0b714f929d171bf5775ae6f84a0

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