Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ada2a930010009…

MALICIOUS

PDF

74.5 KB Created: 2021-03-18 09:40:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 346ec7dd991b680e8e2f0573344da2fa SHA-1: d5f9be67558ec20c3682608b4832ed38f7933a36 SHA-256: d0ada2a930010009dd66ab963ed041df5f1f95acf313f8f1560fd78e3c516d66
126 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating it is a phishing or trojan delivery mechanism. The document presents itself as a pharmacology book, a common lure for spearphishing, and contains numerous external links, many hosted on disposable domains, suggesting an attempt to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it is designed to exploit vulnerabilities or trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=pharmacology+book+pdf+for+mbbs PDF link annotation
    • http://gefosezidubajoz.scienceontheweb.net/gafonuwavelusefuzem.pdfIn PDF document text
    • http://gigezesuzobe.getenjoyment.net/finance_and_administration_manager_job_description.pdfIn PDF document text
    • http://rivilidopu.medianewsonline.com/dell_vostro_1500_drivers.pdfIn PDF document text
    • http://gavediteriremuv.medianewsonline.com/biodata_sample_for_job.pdfIn PDF document text
    • http://rijewomel.scienceontheweb.net/adjectives_to_describe_places_esl.pdfIn PDF document text
    • https://woxudozu.weebly.com/uploads/1/3/6/0/136042517/kexatojaf_badevinuxekeme_sularugako_fizotonemabaz.pdfIn PDF document text
    • http://neridofufuleteg.scienceontheweb.net/simple_past_exercises_hilfen.pdfIn PDF document text
    • http://zexorusawuwurew.sportsontheweb.net/19958017424.pdfIn PDF document text
    • http://rowewuxeg.getenjoyment.net/search_a_shortcut.pdfIn PDF document text
    • https://linoratu.weebly.com/uploads/1/3/4/4/134403550/581eb80230f52f.pdfIn PDF document text
    • http://azakalaza5.xyz/mingling_of_souls_study_guideldobh.pdfIn PDF document text
    • https://wexivupesowapab.weebly.com/uploads/1/3/2/7/132712225/defojotuximumepa.pdfIn PDF document text
    • http://xunetokawetik.sportsontheweb.net/exercicios_alemao_basico.pdfIn PDF document text
    • http://fakts.design/stickman_hook_pcvzr1b.pdfIn PDF document text
    • https://jobovivubip.weebly.com/uploads/1/3/5/3/135392816/4754246.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pasofotamuteper.atwebpages.com/caderno_de_caligrafia_letra_cursiva_para_imprimir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07890230-0892-4906-b580-90b0c80b95cc/how_to_transfer_video_from_canon_to_computer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a99350f4-e945-4845-8c82-7573f0fb5644/83761400147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f5dc50b-2a6f-4e25-a6cf-25f626f1ee3c/54912952297.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/la_gallina_degollada_resumen_muy_corto.pdfIn PDF document text
    • http://lawaxisagiwog.atwebpages.com/nofiletepononexud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccc79427-c1e4-40aa-8009-2268481ac6f8/masterbuilt_electric_smoker_40_inch_bluetooth.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_off0000e365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE365 5876 bytes
SHA-256: ddb25a3df226c07c6b7d0dedca79d5ed338299fb1f46f5a29709707275d662cd
font_01_sfnt_off0000f747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF747 11332 bytes
SHA-256: 92a592bff120b2971e54efb0833cbdbc757bea6ddb3805ba854d4d7543f4f9ac