Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9728d95f7dd13a1…

MALICIOUS

PDF

76.8 KB Created: 2021-03-22 09:17:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 6041c0d7f6f2fc337e400c853bb707cf SHA-1: 67248f6d9b0b24907125a9c91c71a396bb9b85dd SHA-256: d9728d95f7dd13a119fe83f6fa41cf26ca313f13fd9296894ded72c6c5c5aa6f
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high probability of malicious intent. It contains an embedded URI pointing to 'golowaki.ru', which is likely a phishing or malware distribution domain. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into navigating to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/wix?keyword=guide+gear+men%2527s+silvercliff+ii+insulated+waterproof+boots PDF link annotation
    • http://bigops.fun/manual_de_la_tarjeta_madre_msi_h81m-p33h3nd4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483864/normal_6007a8dbe532b.pdfIn PDF document text
    • https://cdn.sqhk.co/bagudivibi/g9IfWqK/71647007660.pdfIn PDF document text
    • https://cdn.sqhk.co/fopikudapom/Dr0jdcQ/morabozefasirad.pdfIn PDF document text
    • https://cdn.sqhk.co/zubafena/pgzJb7a/operation_enduring_freedom_flag_certificate_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409248/normal_5fd3443845e3f.pdfIn PDF document text
    • https://cdn.sqhk.co/nesadatifu/Z3XjbcU/naxogutunobuvulu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487381/normal_5fe56df26869d.pdfIn PDF document text
    • https://cdn.sqhk.co/beledufe/ehjOGjj/wijaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469355/normal_5ffb6966beb59.pdfIn PDF document text
    • http://apsdd54gfv.xyz/the_time_travelers_wife_full_movie_download_in_hindindmuv.pdfIn PDF document text
    • https://cdn.sqhk.co/mivoteloxip/hmhbcch/foxubemefelexele.pdfIn PDF document text
    • http://gladkoe-telo.xyz/joseph_campbells_heros_journey_stages9htk7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484835/normal_601098ac1ad33.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/fajujiju/daily_schedule_for_a_2_year_old_and_newborn.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/65078765895.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/xekij.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/lomosozibexap.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/how_to_take_apart_a_samsung_tablet.pdfIn PDF document text
    • https://s3.amazonaws.com/zuniverijesud/50040806409.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/29879986829.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/64749075730.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/last_reported_zika_case_in_bali.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_off0000eb51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB51 5832 bytes
SHA-256: 0d2c645de0b0c8e05bebc6567ccf20c75b0a2deb33737aa547ac34692d71158d
font_01_sfnt_off0000ff3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3A 11104 bytes
SHA-256: f5cab61b86de7e09a682db0085854bf9b5cf5e95a1b1a1efbdab302bd3d58a46

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