Malicious PDF — malware analysis report

Static analysis result for SHA-256 5329b7ef8624baef…

MALICIOUS

PDF

75.6 KB Created: 2021-03-05 08:59:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a879ea9ae9630a1586b2349c0f61e0b2 SHA-1: 1162b401af5428fc4cbe20b51d5573e7dd895f9e SHA-256: 5329b7ef8624baef208c13e80be4db32984188213fa499cc9a7092f676ec75c2
126 Risk Score

Malware Insights

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

The PDF file contains numerous links to disposable domains and is classified as a phishing and malicious PDF by ML and ClamAV. The document body, though heavily obfuscated, suggests a lure related to research designs, likely to direct users to a link farm for further malicious activity. No scripts were extracted, but the presence of external URIs and the link farm heuristic indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://lozipotod.ru/wb?keyword=what%20are%20the%20different%20types%20of%20qualitative%20research%20designs PDF link annotation
    • https://bofujobepoj.weebly.com/uploads/1/3/1/1/131164048/fenuzoduluwupi-xogovazazi-tisol-gitonemereb.pdfIn PDF document text
    • https://zobatovegu.weebly.com/uploads/1/3/0/8/130873738/7dd412d25994.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474987/normal_602616ee4c039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463825/normal_60184b5f9b90c.pdfIn PDF document text
    • http://openchambre.xyz/infant_food_guide_canadakufwg.pdfIn PDF document text
    • http://megalit-korolev.ru/babijifewukitiyrefh.pdfIn PDF document text
    • http://igcopyrightforhelps.com/virapibebn9ib7.pdfIn PDF document text
    • http://tameenegypt.com/kick_nuts_fight91sts.pdfIn PDF document text
    • http://maska-respirator.com/kerori2al8l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380213/normal_5fd81b0a197d8.pdfIn PDF document text
    • http://leqqurint.online/nikon_coolpix_l22jwobz.pdfIn PDF document text
    • http://retys.space/duzalopugamunowomeht97g.pdfIn PDF document text
    • http://geesecam.com/brother_gx-6750_typewriter_problemseureo.pdfIn PDF document text
    • https://kawuzuke.weebly.com/uploads/1/3/1/6/131606938/kopovinir.pdfIn PDF document text
    • http://freedate18.xyz/comets_asteroids_and_meteors_answers2lc29.pdfIn PDF document text
    • https://jetezilim.weebly.com/uploads/1/3/0/7/130775858/a7556595658.pdfIn PDF document text
    • http://trend-sales.fun/43880110511725a1.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/rimepusox/what_is_the_book_of_numbers.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/xobulapeliv.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/zixirofonarefok.pdfIn PDF document text
    • https://s3.amazonaws.com/dogevazapiwediw/higher_secondary_result_2016_marksheet.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_off0000ea5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5D 5716 bytes
SHA-256: 1043ad4398659090f033413592d22e4a1f902f2b2a900c09505005b5795b214a
font_01_sfnt_off0000fdeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEB 10316 bytes
SHA-256: 0c98b831b5807b62c2c225a18208e40e5cfdd2f8cf9a9e5cea411b5119ede1fe

Open this report in the interactive analyzer, or submit your own file for analysis.