Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d3dea851440d223…

MALICIOUS

PDF

76.9 KB Created: 2021-03-16 11:33:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9a75a2193a17e718fe8eedb95d041472 SHA-1: b2e4b1dd03527301921d3a93c20b39ae5b305570 SHA-256: 9d3dea851440d2239148713bc0799eb1d709e9e626161c68cbc8f7fff9564d11
126 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a domain associated with malicious activity. The document body, though heavily obfuscated, contains text related to COVID-19 testing, suggesting a lure to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://gimoguvi.ru/strik?utm_term=can+anyone+get+a+covid+test+in+california PDF link annotation
    • http://homeolimp.com/41927067986f655d.pdfIn PDF document text
    • http://linza.media/36052174505la8y2.pdfIn PDF document text
    • http://uscreditreport.info/plot_diagram_template_for_middle_schoolf6r4s.pdfIn PDF document text
    • https://cdn.sqhk.co/bogabixexuja/5jgEYxN/74830948018.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/covid_test_delivery_jobs_liverpool.pdfIn PDF document text
    • http://like-store.site/cwm_recovery_zip5grji.pdfIn PDF document text
    • http://hangookoil.ru/mahindra_tractor_dealers_texase8w53.pdfIn PDF document text
    • https://cdn.sqhk.co/xovinexesun/fUfeifF/photoshop_unicorn_horn.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/dWyy4oX/deer_hunter_2010_pc_game_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefima/hj8vvE1/xanigilaguja.pdfIn PDF document text
    • http://natlab.ru/migilogz6rgs.pdfIn PDF document text
    • http://repair-monokoles.ru/character_creator_3_full_crackmtx9w.pdfIn PDF document text
    • http://cafechorsu.ru/jbl_lsr305p_mkii_reviewxzhzd.pdfIn PDF document text
    • http://yewes.fun/41962521809v6ty0.pdfIn PDF document text
    • http://metazoaapc.fun/bogiwidolinuxaje3r189.pdfIn PDF document text
    • http://activa-fb.com/calibans_war_characters6bz0d.pdfIn PDF document text
    • http://probmake12.xyz/lullaby_songs_for_babies_2_hoursmenco.pdfIn PDF document text
    • http://zuzorovix.scienceontheweb.net/31076324724.pdfIn PDF document text
    • http://easylearning.space/nclex-pn_study_guide_20202rxhj.pdfIn PDF document text
    • http://lologunaw.mygamesonline.org/xujifefetideb.pdfIn PDF document text
    • http://samafutanub.mypressonline.com/97348830235.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/hghjfMo/4008672652.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vigexosav.myartsonline.com/types_of_affinity_chromatography.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 5

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_off0000ecd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD0 5256 bytes
SHA-256: 3c2107c3e73e6b406324bc12dedd17d681158fd3032fd4cbd1c51c107368e452
font_01_sfnt_off0000fece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECE 11040 bytes
SHA-256: 44de36b5b0f9adc60052db621bcaa0752756c4d92e2d865ca1ec41a7ec610332

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