Malicious PDF — malware analysis report

Static analysis result for SHA-256 35b8ca0a84ee7527…

MALICIOUS

PDF

79.0 KB Created: 2021-03-08 05:43:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 13309eebf54ad43df46d77e4131d1444 SHA-1: 592ba79f372d298975fe5cda3e13319ef1df44e7 SHA-256: 35b8ca0a84ee7527994ace87f97e4cc5036cf1cac0b7dc6838e28d21f594470b
184 Risk Score

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
  • 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=captive+in+the+dark+english+pdf In PDF document text
    • http://warupipujamoru.sportsontheweb.net/1260048382.pdfIn PDF document text
    • https://duzaguzu.weebly.com/uploads/1/3/1/4/131406181/tujimupeja_pidupufid_tupuwa.pdfIn PDF document text
    • https://pulatufulufu.weebly.com/uploads/1/3/4/6/134610330/xusawis.pdfIn PDF document text
    • https://jegagevo.weebly.com/uploads/1/3/4/1/134109204/7193588.pdfIn PDF document text
    • http://tezibif.mygamesonline.org/world_history_book_9th_grade.pdfIn PDF document text
    • http://tuderoba.getenjoyment.net/31982920511.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/sumesawoxajew/mesh_boolean_c4d_plugin_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7dcb078-a3ba-4d7c-9425-a707249fd8c1/21863704076.pdfIn PDF document text
    • http://vonubopoz.rf.gd/kutereru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/915fe366-8303-4413-bb06-0d9cd892f6d4/pexajagubopalenirapomod.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/80140008389.pdfIn PDF document text
    • http://xavisijividefo.epizy.com/barilla_whole_grain_spaghetti_nutrition_information.pdfIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/9171855292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0821036a-6c9c-432d-9ba0-084a2d3a7cfb/lowuxaxupawoligelexujot.pdfIn PDF document text
    • http://sipanokule.onlinewebshop.net/la_la_land_final_script.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_off0000f6a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A4 5332 bytes
SHA-256: 7712cb4af859b1e4a3a7378de7a37e20f69009f85b1f1183b85fc43ccf3bd0d4
font_01_sfnt_off000108c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C5 11200 bytes
SHA-256: 24d664a6ddce3f2dd83a745f39dd24568bc14d3495cee1ff4f82b49ff14e397d