Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b9c65fc591a4a17…

MALICIOUS

PDF

70.2 KB Created: 2021-02-25 22:51:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e5c57a0e979d7a2cd58a248ec8b98edc SHA-1: 382144f2f880963f4f02e7e4934dfd1ab22d846c SHA-256: 1b9c65fc591a4a17e494bc20d338ee456d6d901bb371d0cc46fd3cb11856b47b
184 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=volume+of+a+cylinder+worksheet+grade+8+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4450434/normal_5ff9fe8b5df56.pdfIn PDF document text
    • http://fupemagis.mywebcommunity.org/los_nombres_de_dios_en_la_biblia_catolica.pdfIn PDF document text
    • http://nasufulorejuwe.mywebcommunity.org/roman_catholic_breviary_app.pdfIn PDF document text
    • http://xemizawufogutuf.scienceontheweb.net/vamumexilu.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/neropijarugix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501634/normal_600d069fa9905.pdfIn PDF document text
    • http://teaapple.space/coliformes_termotolerantes_o_queasn5h.pdfIn PDF document text
    • http://numulul.mygamesonline.org/master_forge_grill_model_l3218.pdfIn PDF document text
    • http://fofoketezifofi.22web.org/82036265503.pdfIn PDF document text
    • http://bidizujimon.getenjoyment.net/3_words_8_letters_meme.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/how_to_connect_ipega_to_iphone_7.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/rebesudanolo/dibil.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/2012_electoral_college_map_activity_answer_key.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/nosinobivivimezir.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/vetilatono.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_off0000d446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD446 5984 bytes
SHA-256: 09bc6b3624b7690839ca76c66b84f5cc1d9aea3e004ffff4d7635f70065cdd47
font_01_sfnt_off0000e89d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89D 10300 bytes
SHA-256: 7a409db0382f0a24504abf8d416677b0c587b24503a1cc88fa8a0f6766b6b2fc