Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5b9127628677fde…

MALICIOUS

PDF

82.1 KB Created: 2021-03-01 19:37:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 905378087c2f3d33ff3e12ddb599e842 SHA-1: 0c46f9cff97f8a1e67025b9172823ab89a9a1f71 SHA-256: a5b9127628677fde303326304ab34992490254497630ad4265bf78ab595941e5
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to obscure malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=make+your+own+war+game PDF link annotation
    • https://cdn.sqhk.co/vusabutam/nhgicja/flying_fire_dragon_robot_transform_bike_robot_games.pdfIn PDF document text
    • http://qwonder.space/lanonumititarovusedajgoazc.pdfIn PDF document text
    • http://losinglotterynumbers.com/mopokomadebilabedopusafi8t4u8.pdfIn PDF document text
    • http://nogurufegu.mygamesonline.org/the_dragon_prince_season_2_in_hindi_watch_online.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/giz00ha/free_stuff_craigslist_chicago.pdfIn PDF document text
    • http://verefdliyvtorogo.xyz/cerfa_15776_modifiableypvkc.pdfIn PDF document text
    • http://xomuxeje.22web.org/nokojineg.pdfIn PDF document text
    • http://zhenskiizhurnal.ru/tufuja24vz.pdfIn PDF document text
    • https://cdn.sqhk.co/kuruwoke/hahk7wp/words_crush_hidden_themes_cities_answers.pdfIn PDF document text
    • http://eu-study.ru/net_framework_4._0_3019_filehippoj35o7.pdfIn PDF document text
    • http://simopuvoramawu.mywebcommunity.org/55126361830.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuzuzifo.epizy.com/azle_isd_athletic_forms.pdfIn PDF document text
    • http://xofigawarogipiw.rf.gd/sapogimosefeletef.pdfIn PDF document text
    • http://pedirite.onlinewebshop.net/84551079133.pdfIn PDF document text
    • http://keretagukuvar.epizy.com/74717966266.pdfIn PDF document text
    • http://jirapatosug.rf.gd/tipos_de_planos_elctricos.pdfIn PDF document text
    • http://xebowuruno.epizy.com/ge_universal_remote_code_list_for_lg_tv.pdfIn PDF document text
    • http://beximor.epizy.com/bala_bala_full_song_pagalworld.pdfIn PDF document text
    • http://magotabitujotu.rf.gd/bodyboss_ultimate_body_fitness_guide_free.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_off000104a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A4 5056 bytes
SHA-256: fd9be9f707727927ca25bd946aae090d05614cf498055a13847ace978b017804
font_01_sfnt_off000115ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115EF 10884 bytes
SHA-256: a982c7ef9143081316de9ebab804bf2cf1171672224a09c62f34cf308be8ea51

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