Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d4b880c956ccb8…

MALICIOUS

PDF

76.5 KB Created: 2021-02-16 04:08:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 276de8a65527eb641cc5d92a0d6bd233 SHA-1: dbb44265514bba393d8df7b4abf903f5090cc2d4 SHA-256: 04d4b880c956ccb89181940dba15ab9d98819cbe265af5d25d517aecc1736427
186 Risk Score

Malware Insights

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

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 0.9998

Heuristics 6

  • 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 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://maypoin.ru/strik?utm_term=how+the+metric+units+for+length+volume+and+mass+are+related PDF link annotation
    • https://lonoripub.weebly.com/uploads/1/3/5/3/135319728/duroj.pdfIn PDF document text
    • https://latobebesat.weebly.com/uploads/1/3/5/9/135993630/ea0b43a90b8a8f.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisitixinu/Fgcghgh/mor_sansar_ma_cg_song_mp3_download_pagalworld.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/j3FRNNk/amcas_letter_of_recommendation_submission.pdfIn PDF document text
    • http://yellownatural.space/87416347937cew88.pdfIn PDF document text
    • https://tusigidufamem.weebly.com/uploads/1/3/5/3/135350313/katetividaw_fiwokogir_sosapotoxenune_fupelutegenite.pdfIn PDF document text
    • https://takesefitetipal.weebly.com/uploads/1/3/2/6/132682925/a8a440d0c3.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/CZoqUgi/jiomeet_app_download_apk.pdfIn PDF document text
    • https://falitevegenos.weebly.com/uploads/1/3/4/3/134321562/rifozilaxiwema_regigokunibaw_rapukeza.pdfIn PDF document text
    • https://wopeduvolevim.weebly.com/uploads/1/3/0/7/130776212/bakebekonigebuwidat.pdfIn PDF document text
    • https://wefogazasu.weebly.com/uploads/1/3/4/8/134880183/givogifatagola.pdfIn PDF document text
    • https://dipalowijoje.weebly.com/uploads/1/3/0/9/130969855/kebumirogomez.pdfIn PDF document text
    • https://kalozepi.weebly.com/uploads/1/3/0/8/130814360/8534053.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bedevekozazabe.rf.gd/despacito_marimba_ringtone_iphone.pdfIn PDF document text
    • http://jobifizokugo.rf.gd/axios_form_data_react_native.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/battlefield_v_free_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/wutedudejuxatapokosumu.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/jepexofe.pdfIn PDF document text
    • http://lojurixerura.epizy.com/danewenafobofez.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/xafovugafasedidujepanig.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDA 5548 bytes
SHA-256: e51dde6a697c8bb0cfc18e3712cfb905e905af4bccae55bac3e7d58fb35c694a
font_01_sfnt_off0000fea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA3 10872 bytes
SHA-256: c1bcb15f12cc52c3899fdc9a0e6a3d90abb48dad82e3c826dab35da474ebddce

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