Malicious PDF — malware analysis report

Static analysis result for SHA-256 5df5bb5a9539f590…

MALICIOUS

PDF

200.3 KB Created: 2021-05-21 12:07:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: aa67bff3e9e420cba311558106371a07 SHA-1: e990363e5dbb64b08b658b4b26f5f0ada950e86b SHA-256: 5df5bb5a9539f590938ce748ba4573cf952265ea05b43d41691606dea426746f
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'golowaki.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to historical events, a common tactic for phishing or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9791

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/strik?utm_term=rebelion+de+tupac+amaru+ii+resumen PDF link annotation
    • https://fuluposusiziz.weebly.com/uploads/1/3/5/3/135321682/825c4415a4a0b10.pdfIn PDF document text
    • https://xijaxerunoseme.weebly.com/uploads/1/3/4/3/134306079/8627986.pdfIn PDF document text
    • https://gasezojilatinoj.weebly.com/uploads/1/3/1/4/131455825/1d4ac1.pdfIn PDF document text
    • https://lurenejaxerugu.weebly.com/uploads/1/3/4/7/134728533/zomison_zanesotiba_lozaruviz_nirolun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460686/normal_5fddb414037bd.pdfIn PDF document text
    • https://zemedabumudog.weebly.com/uploads/1/3/2/7/132712209/suwalerukatipes.pdfIn PDF document text
    • https://radugolun.weebly.com/uploads/1/3/4/3/134367443/vubegimiligawal_pujafojovobod_tozafutesixib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382187/normal_5ff3933b20bb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457008/normal_6035a99379906.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403429/normal_6018d9ede5812.pdfIn PDF document text
    • https://gaxasexafarud.weebly.com/uploads/1/3/4/5/134590452/zemafixomo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450259/normal_603817a10abd7.pdfIn PDF document text
    • https://tokebezewala.weebly.com/uploads/1/3/3/9/133999388/derubujutu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d03bc74-e02c-4e56-a045-938ec8aca605/how_to_write_a_descriptive_story_ks2.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/friday_the_13th_episode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/36488015737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b6d7a59-366e-4172-ac5f-e168c600a527/sobow.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/xaxumosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7844a030-9860-4fd1-98b2-97245ca9f2ec/reddy_heater_30000_btu.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/tigumugafenijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c07983e-34c4-4ded-a7dc-5354d6712193/40524760463.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/que_es_composicion_en_arquitectura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46de51e6-d585-44a5-ac7d-8d0333b84e6e/schwinn_exercise_bikes_for_sale_near_me.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_off0002d5da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D5DA 5364 bytes
SHA-256: 4581d171820fb43c57c1d3295bfaa9e910cee96a79659928251e9cba1be5a903
font_01_sfnt_off0002e7f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E7F8 12976 bytes
SHA-256: 5ac36450cfc94784298982362adad7a75bc724462148dca939c65e9fda5c42ec

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