Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f208b16634bead4…

MALICIOUS

PDF

69.5 KB Created: 2021-04-02 17:11:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 974ae56a0d0518b088f33c0bfef1cbee SHA-1: 961da693ad9cde36e98169197c8a8f7d300dba35 SHA-256: 1f208b16634bead4cbf61d983e73890f5a57ddd314177613dc14d88ca442e639
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://bologen.ru/wix?keyword=home+sheep+home+2+lost+in+london+y8 PDF link annotation
    • http://businesshelpservice.com/362773396322qm17.pdfIn PDF document text
    • http://jnatural.space/59064225543kcsed.pdfIn PDF document text
    • http://radasekot.iblogger.org/free_affidavit_form_qld.pdfIn PDF document text
    • http://myfoxing.online/gebunumozixazivupetafewdn8ki.pdfIn PDF document text
    • https://lijafaxad.weebly.com/uploads/1/3/5/9/135989690/jozisitorupukar.pdfIn PDF document text
    • https://vuwawirekexaz.weebly.com/uploads/1/3/0/9/130969699/sinarufedaneg.pdfIn PDF document text
    • http://sejerodetupumil.medianewsonline.com/add_subtract_multiply_divide_polynomials_worksheet.pdfIn PDF document text
    • http://geniusenglish.space/descargar_antony_santo_mi_primera_vez_en_vivosmqbb.pdfIn PDF document text
    • http://eurozone.pro/34483285024ypfof.pdfIn PDF document text
    • http://metumudape.iblogger.org/canadian_accreditation_standards_for_hospitals.pdfIn PDF document text
    • http://maddot.space/48018881430kyuk6.pdfIn PDF document text
    • http://pimesizawox.sportsontheweb.net/zubekoxuvikiroxot.pdfIn PDF document text
    • http://wersita.space/gitowosalelamaftksz0.pdfIn PDF document text
    • https://nuramovu.weebly.com/uploads/1/3/4/3/134363108/fepixuwetolawememed.pdfIn PDF document text
    • http://dvestideyli.xyz/actual_brayton_cycle9ye0v.pdfIn PDF document text
    • https://xufefizomuziz.weebly.com/uploads/1/3/5/3/135346589/22c36e43.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://monafepunojam.epizy.com/cats_in_the_cradle_chords.pdfIn PDF document text
    • http://gerutijotinana.rf.gd/sirovoko.pdfIn PDF document text
    • http://lasekoto.rf.gd/xaxubakuxipifesibesevok.pdfIn PDF document text
    • http://bolagiwajaretu.rf.gd/26061052003.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_off0000d321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD321 5280 bytes
SHA-256: b445d4b60c1cf7305fe57d52fe7fed16b7158985e5443b40c182f6018d1329d0
font_01_sfnt_off0000e4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FB 9992 bytes
SHA-256: 4a940ddc3450f200afe0073d89fd8d60ad28570c5fe46367570523d746e44ee7