Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee61c70614df9981…

MALICIOUS

PDF

81.6 KB Created: 2021-06-07 01:53:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d6e96ac245ea6c7d7493ff85d500ec24 SHA-1: 50fd310c6ac3b9d2cd8265c60b466dcd1e417ce5 SHA-256: ee61c70614df9981634eb91b9aaa5527ed4839abbf5ca7a457672189bbeb213a
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by both ClamAV and an ML classifier. It contains a link farm with numerous external URLs, many of which are disposable or hosted on suspicious domains, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure for downloading a movie, a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ketchas.ru/pbw?utm_term=arjun+reddy+2017+telugu+movie+download+in+tamilyogi PDF link annotation
    • https://ribufesoguvas.weebly.com/uploads/1/3/4/6/134680119/xonatutixabadeg.pdfIn PDF document text
    • https://nizomepovunamox.weebly.com/uploads/1/3/4/3/134305669/a8fc654f086.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405195/normal_6029f4b1dbb00.pdfIn PDF document text
    • https://gijajagilaz.weebly.com/uploads/1/3/5/3/135313732/154543.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502817/normal_6024fcc831d66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368497/normal_5ffc63ad23d06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495254/normal_5fdc2a53e3fbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449185/normal_60449162ddb05.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f2469ea-c56e-4826-85fb-f01e102b2286/bipawufapodipidefevuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a2092fc-19f8-4a23-b20a-5dc1deb4b5d3/python_for_loop_range_of_numbers.pdfIn PDF document text
    • http://gifavipa.pbworks.com/f/ejemplos_de_cdigo_en_los_elementos_de_la_comunicacin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4140e05-c6e8-4a3a-95df-679ea8bdd15e/navenijetepak.pdfIn PDF document text
    • http://vulazojab.pbworks.com/w/file/fetch/144546300/reprogram_genie_wireless_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/301702f0-113e-440b-b9cf-5dc786c86b58/58713605995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93257f18-46f0-4652-afa2-c29eb7dd88ec/how_to_use_multimeter_for_continuity_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5271faed-7290-4552-830d-b769b3bfc565/vitutimipimalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0626780d-7c8c-45e0-90ca-3971ec740a7d/gta_vice_city_deluxe_rar_file_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72fc3ffe-d3cb-4409-b811-8369184a7c69/tabla_de_aniones_y_cationes_completa.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_off0000ff35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF35 5692 bytes
SHA-256: 748193dab7b65ba19ff8462c7a00c5fa4cc607fc28e52a607e5e4281190beb6f
font_01_sfnt_off000112aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112AA 11436 bytes
SHA-256: 693a8a1139d399cd4045e21b6fd033739319b741fbfeba7337da9670f8b4fce5