Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb57708ab0b0b45a…

MALICIOUS

PDF

73.2 KB Created: 2021-02-28 22:54:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c23a8ef90c54efe70cc7407231698654 SHA-1: 42a62a850a04e9e08e89c5ace63aee582f34109d SHA-256: cb57708ab0b0b45af5c29e0da233c03f4cba96d5db66a079a111c2b81969ed4f
126 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
  • 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://xajibur.ru/award?keyword=big+nate+in+the+zone+pdf+free PDF link annotation
    • http://gojavodevagajuw.mygamesonline.org/can_you_remarry_after_divorce_scripture.pdfIn PDF document text
    • http://cmbespaceclient.xyz/how_to_crochet_a_baby_blanket_step_by_step_with_picturesa7art.pdfIn PDF document text
    • https://cdn.sqhk.co/duvapegoleva/dhejiji/summer_2020_nail_colors_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/zatejurix/jhajgdQ/zeliluvozininopejagope.pdfIn PDF document text
    • https://cdn.sqhk.co/wifukatar/JhjCihx/comment_installer_un_mod_minecraft_java.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/OZ0ghaH/tomb_run_game_y8.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/eigiijb/rozojalojekogo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481403/normal_6019d2d247df7.pdfIn PDF document text
    • http://dabukim.mygamesonline.org/junior_english_grammar_and_composition_free_download.pdfIn PDF document text
    • http://znatural.space/457207935902rd1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387581/normal_5fff708169593.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466367/normal_5fdf645e6ae6e.pdfIn PDF document text
    • https://cdn.sqhk.co/gadujotev/ieMXihy/jijepanedatewitugupuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nivuzujanux.myartsonline.com/medivokosarapevavexitozej.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/tomizu.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_off0000e03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03A 5192 bytes
SHA-256: 0ef3b6f075b907ba162e8b876f408c384d8d1ab6121f4c49c1307fca24c796ee
font_01_sfnt_off0000f1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F1 10664 bytes
SHA-256: 7800d53dc2bce3d5a8231a3d88b9b3b97edf019b2289c4609296c73742711ca6