Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a8341c6ea435f6f…

MALICIOUS

PDF

77.0 KB Created: 2021-03-01 03:49:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cab183e38a8496f633ab9bf5c4e2d372 SHA-1: 5490e2c8cfde606ae46913d3b697754b0f99cfd4 SHA-256: 5a8341c6ea435f6f0ab3e31b50f3d394f7571dad006fd51b9b30a0a15bf7169d
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, 'jumiwimov.ru', which is likely used to deliver a secondary payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to trampoline weight limits, which is a common tactic to disguise malicious intent.

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://jumiwimov.ru/strik?utm_term=what+is+the+weight+limit+for+a+15+ft+trampoline PDF link annotation
    • http://wonnaturila.space/english_to_hindi_kruti_dev_010_onlinenj2b2.pdfIn PDF document text
    • http://martans.space/baahubali_2_the_conclusion_downloadq704d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486213/normal_5fe3ff6360f08.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445866/normal_5fcce4db1c2a8.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/akuntansi_keuangan_menengah_dwi_martania2f33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421939/normal_602804d17024b.pdfIn PDF document text
    • https://cdn.sqhk.co/tudifemumopi/giekiff/57662470268.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487186/normal_6021c02fdfc25.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/f3ChfGV/wonepoxewupozifowivupi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477863/normal_5ff44f313ad7b.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/Zifjbii/zefogelapagidur.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414487/normal_6005065d6481f.pdfIn PDF document text
    • https://cdn.sqhk.co/kigowabalo/jdhahgm/giwovekawuxoki.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/rekorewexidiwo/around_the_world_in_80_days_character_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/zoxegubomikije.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_off0000ee56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE56 5596 bytes
SHA-256: 5e4ea5b29be60556f3f31adc86d73c779c5680cf34fed57eecb8655598f643f0
font_01_sfnt_off00010160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10160 10732 bytes
SHA-256: eb5a8a66fc93d799a5191e3b0f810b4d585db6cb82397761faf3bc19e2a6a00b

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