Malicious PDF — malware analysis report

Static analysis result for SHA-256 be024bdf26a7b842…

MALICIOUS

PDF

74.7 KB Created: 2021-02-28 04:42:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 61a5eefa2982e182d870e661fd9581ae SHA-1: a1bdc78c2e458c5025e97fc7bc8b282d383bd81c SHA-256: be024bdf26a7b8428de55a290980e7b28e033661e904ae7805f6bc87dbb72686
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for a malicious redirector link and ML classification. The document contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or malware distribution attempt. The presence of these links indicates an attempt to lure users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=lds%20temple%20calendar%202021 In PDF document text
    • http://urott-hu.com/how_to_start_boxing_at_home_without_a_punching_bag23z4q.pdfIn PDF document text
    • http://gamukanemafutu.mywebcommunity.org/netgear_wnr2000_repeater.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/jnVFR7m/robofixunalagefoxomobom.pdfIn PDF document text
    • http://zobebukore.22web.org/bexuzuradijomejuxifaw.pdfIn PDF document text
    • https://cdn.sqhk.co/gibuzini/2jjaWgZ/kakedikaremeruvufaka.pdfIn PDF document text
    • http://mavigawika.scienceontheweb.net/wonijuwufavemi.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxujakosepa/ighhxhj/gokoge.pdfIn PDF document text
    • http://ladekepevij.mygamesonline.org/what_is_the_angel_number_802_meaning.pdfIn PDF document text
    • https://wifevotus.weebly.com/uploads/1/3/4/8/134897576/punusijunaxo_kaxapafedugi_daduvanemixo_tuxeposuju.pdfIn PDF document text
    • http://rusakova.space/generative_adversarial_networks_with_python_jason_brownlee4911g.pdfIn PDF document text
    • http://bubble1.space/motions_of_the_earth_class_6fgfuo.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/gWjhhcm/soccer_kicks_football.pdfIn PDF document text
    • http://sunufosabupes.scienceontheweb.net/78598521030.pdfIn PDF document text
    • http://lg-copyrightforms.com/crikey_it_s_the_irwins_episode_guidew9rqd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://radiviwix.onlinewebshop.net/44844410708.pdfIn PDF document text
    • http://radisabuvaba.epizy.com/rizodalewusej.pdfIn PDF document text
    • http://relegutewaxo.epizy.com/que_medios_de_comunicacion_existen_en_una_empresa.pdfIn PDF document text
    • http://relogevavikidid.epizy.com/lagu_percaya_aku_cover_eclat.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_off0000e56b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56B 5484 bytes
SHA-256: b7beb4b34756ecb4ed095e452d2a1bf2fb5ce5f77ad29897997980a1d2ba6023
font_01_sfnt_off0000f7fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FD 10988 bytes
SHA-256: c034bb581a2d97b53f8518bef4d700106cdf2ab19494ac69048117bb7ea48375

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