Malicious PDF — malware analysis report

Static analysis result for SHA-256 63a0a35354149af2…

MALICIOUS

PDF

80.8 KB Created: 2021-06-06 18:58:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 09cf4509214b36ddb3b046d1037af878 SHA-1: da2187d9443712f6174f18f9760d942be8d717a0 SHA-256: 63a0a35354149af215858c58857c0e701402784f2ebe96e071cf1b4177813fa4
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'kuzutuzo.ru', which is likely a phishing or malware distribution site. Although no scripts were extracted, the presence of the malicious URL and the PDF's classification strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/123?utm_term=focus+movie+parents+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465687/normal_5ff2410f7660e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446494/normal_5fffeaa533ef0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415935/normal_6000296c91672.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369166/normal_5fcda05ca30f1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://najapenoz.pbworks.com/f/livro_learn_and_share_in_english_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd6d024b-cf42-419f-be33-ac2ec4c357d6/vutojibotodagur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7194f637-94a2-463a-a339-4ed7737eecb6/bajaj_pulsar_150_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cbb4b6a-abb8-4cc8-8851-6622f5637788/liruxusizoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd0be034-411a-4dc2-8e0e-5732e9c7b6c7/is_a_trane_xr14_good.pdfIn PDF document text
    • http://ziludezubeju.pbworks.com/w/file/fetch/144563289/how_to_install_netflix_to_skyworth_smart_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3183989d-04a3-400d-af2a-7efbc1a48cf3/rodibotemanumatix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcd95a72-d1de-4570-8d4f-1d10e65b506c/reacciones_de_combustion_ejercicios.pdfIn PDF document text
    • http://padimagofo.pbworks.com/w/file/fetch/144457677/what_does_service_start_stop_system_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22c3b9ae-8d28-4575-a856-a9254e09d984/how_to_join_the_scottish_rite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e3237ee-5a9c-4742-8434-99292d72cae6/xabisasepe.pdfIn PDF document text
    • http://febokipup.pbworks.com/w/file/fetch/144667428/23340335272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/903472b5-03a6-4858-b290-64c0644d6036/77821944609.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83b5eb80-f5fe-43ef-abd8-2e8b1f2f913a/27117746022.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_off0000ff22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF22 5376 bytes
SHA-256: 619e529d2e7bf5aba9ee1375f2929c398e378928b4a70f61f487ad4fcd8dc25d
font_01_sfnt_off0001115f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115F 10684 bytes
SHA-256: 40cf9717b32ce067aaebf76b07edd64b8edc3dfc8ecffec5f265d133dafd0f93

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