Malicious PDF — malware analysis report

Static analysis result for SHA-256 039c75cb2b7627ce…

MALICIOUS

PDF

87.1 KB Created: 2021-03-28 12:39:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: e7bed54f96c619b7bbcde1504c469d88 SHA-1: 89c0cd4e3976b8a755f2ff69b333e9376ba93b12 SHA-256: 039c75cb2b7627cef8e8d3ba205ee6524a001d3ed795398e3c597d12a730793f
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a significant number pointing to disposable hosting and exhibiting link farm characteristics, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

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://pelibifir.ru/wix?keyword=is+mike+holmes+son+still+married PDF link annotation
    • https://cdn.sqhk.co/foradimotiri/ggijwOJ/draw._io_desktop_download_windows.pdfIn PDF document text
    • https://cdn.sqhk.co/tivuzofep/iaib8gj/call_of_mini_zombie_2_hack_mod_apk.pdfIn PDF document text
    • http://jokebixa.22web.org/katawopazunizikanasa.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutazomaga/jgehjjq/best_murder_mystery_books_for_young_adults.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426408/normal_604f0397c0a08.pdfIn PDF document text
    • http://kovemiwixipogaf.66ghz.com/33822094851.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457854/normal_5fe85571929f4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jezekemunidup/camila_cabello_senorita_song.pdfIn PDF document text
    • http://vuzudaru.epizy.com/3429876665.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/95891954962.pdfIn PDF document text
    • https://1cf095b7-1d29-4152-b82c-7733cf7ba0c7.filesusr.com/ugd/c1de29_30e644ce9ba347c0ab641c4a977399f2.pdf?index=trueIn PDF document text
    • http://tovivefi.rf.gd/marthoma_lectionary_2020.pdfIn PDF document text
    • http://sanejiwobar.epizy.com/free_10x10_storage_shed_plans.pdfIn PDF document text
    • https://46fb9a51-9e16-4ad8-811e-2f7ed01702f7.filesusr.com/ugd/53363c_6883958ad6524e3ca385535ab67dab65.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/full_form_of_indian_army.pdfIn PDF document text
    • http://laguwirir.epizy.com/fokoxuwazu.pdfIn PDF document text
    • http://bepenopivite.epizy.com/wumamodomasijafeluf.pdfIn PDF document text
    • http://weguxoxuwaxa.epizy.com/audio_de_la_biblia_reina_valera_1960descargar_gratis.pdfIn PDF document text
    • http://nilidax.epizy.com/gosizunugejori.pdfIn PDF document text
    • http://sonowodiguvab.epizy.com/ajax_tutorial_for_beginners_with_examples_free_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010af5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF5 4856 bytes
SHA-256: 82b77aa1ee10347f3ad88faf8a248a2fe02a3f402392d8550c840a69d0972add
font_01_sfnt_off00011b3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3D 10952 bytes
SHA-256: e988b5ca122523c5a6ee0fe68e7be8218e7f94555c95d3368672095c88a486fd
font_02_sfnt_off000140cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140CF 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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