Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce4a244731030268…

MALICIOUS

PDF

76.1 KB Created: 2021-06-01 03:55:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: f8ddd010fe03f8070bef9a1406e805c7 SHA-1: 640655feeefe2244399f6ec5a00534e4acc70ef9 SHA-256: ce4a24473103026878779399e3b85ceb879183f4099d11b1277cbcbb7c966444
186 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded external links, characteristic of a link farm designed to direct users to potentially malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to exploit user navigation to external, untrusted resources.

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://fokemale.ru/wb?keyword=strangers%20in%20their%20own%20land%20review PDF link annotation
    • https://sinegozedajosor.weebly.com/uploads/1/3/1/8/131871849/nofelapezag.pdfIn PDF document text
    • https://mugunerer.weebly.com/uploads/1/3/4/4/134479547/mekifebixup.pdfIn PDF document text
    • https://waxopudiva.weebly.com/uploads/1/3/4/6/134695928/bizij.pdfIn PDF document text
    • https://donokodupotev.weebly.com/uploads/1/3/4/3/134317189/lejisiparudafut.pdfIn PDF document text
    • https://fowowudajij.weebly.com/uploads/1/3/5/3/135312379/6634556.pdfIn PDF document text
    • https://pasugewu.weebly.com/uploads/1/3/1/0/131071180/9512360.pdfIn PDF document text
    • https://vekadewozume.weebly.com/uploads/1/3/0/9/130969331/890658.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/04e4bffb-f7e0-474a-acdc-f5d7decdcecc/zabete.pdfIn PDF document text
    • http://xuruzinijub.pbworks.com/w/file/fetch/144423399/15552984218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88869640-db8d-480f-a45b-d8d5d6001640/43230305497.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f60c3614-1eef-4236-aa83-c07255148f96/singer_4-in-1_futura_quartet_sewing_embroidery_quilting_and_serging_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a46d7ac-79f7-4f12-b1d5-e4a517f55e0f/english_access_book_class_7_free_download.pdfIn PDF document text
    • http://tazijebep.pbworks.com/f/74404928780.pdfIn PDF document text
    • http://xetibubib.pbworks.com/w/file/fetch/144418668/what_is_the_composition_of_olive_oil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f8ddede-1c5a-47a9-b5a6-fa3e949727e8/castle_ravenloft_miniatures_list.pdfIn PDF document text
    • http://lekuzax.pbworks.com/f/maine_pyaar_kyun_kiya_mp3_download_pagalworld.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ec4cecc-e8ea-4353-b708-081414bded17/sonoma_county_bus_schedule_42.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce201d8a-765c-490a-bb52-81daf71929c5/nidedabevibuvopinakanaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/819356c2-07f7-4cae-93ab-67e6021525b9/does_ford_own_freightliner.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_off0000ed53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED53 5340 bytes
SHA-256: 84c44c318ce1ff2dc69d803e981b62259a7ee6aa1a0d26ff778df99c66101473
font_01_sfnt_off0000ff8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8C 10556 bytes
SHA-256: 9af90def918d3aafcff142fd993addf34406d75098cb670ee280f08d164c9929