Malicious PDF — malware analysis report

Static analysis result for SHA-256 72afa2ab5a145789…

MALICIOUS

PDF

76.4 KB Created: 2021-02-21 14:05:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f95406142a87d1cfa97be010dcb150f2 SHA-1: 9c3a3248e01fa7bd114866336d160c667c3fd7fb SHA-256: 72afa2ab5a14578934758e941e4408a357b596a462ff44e92a5eb3fcccde30e6
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains fragments suggesting a lure related to 'wifi' and 'underwater', aligning with the external URI.

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://leonvi.ru/123?utm_term=can+wifi+transmit+underwater PDF link annotation
    • https://xofuvavafifibib.weebly.com/uploads/1/3/4/3/134386759/zovutu_vipaxa.pdfIn PDF document text
    • https://nugaruxiboxora.weebly.com/uploads/1/3/0/7/130738781/bajozam_dujozosegutigov_malom.pdfIn PDF document text
    • https://cdn.sqhk.co/tijanukubo/dwthbgd/ridoruvode.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/cphfARY/benokiwigu.pdfIn PDF document text
    • https://cdn.sqhk.co/lorotukogof/ifgj4DV/60918898663.pdfIn PDF document text
    • http://geekcods.com/musekudyl507.pdfIn PDF document text
    • https://volafonozus.weebly.com/uploads/1/3/0/7/130775232/3082493.pdfIn PDF document text
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/rowapewuzupij-simaxijo-nisaxu-jaxamefexom.pdfIn PDF document text
    • https://bufigolumixi.weebly.com/uploads/1/3/4/2/134234787/dobexekugazu-mexomonud-wizabakejami.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/casio_edifice_5041_manual.pdfIn PDF document text
    • http://sazizonega.rf.gd/37169079155.pdfIn PDF document text
    • http://kasazupolixugi.epizy.com/zarchiver_for_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/online_timesheet_calculator_with_breaks.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/multi_step_inequalities_word_problems_answer_key.pdfIn PDF document text
    • http://palakojum.rf.gd/bulletin_of_earthquake_engineering_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/remopuwex.pdfIn PDF document text
    • http://mamisiz.rf.gd/bullet_force_mod_apk_data.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D0 4908 bytes
SHA-256: 011e78f90f4e431f242ede57443cd0a30e6614d3d34f84f39f6bf405776ea607
font_01_sfnt_off0000f16f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16F 10784 bytes
SHA-256: 45c7d1bd5d8b08e0cd9e3946c9e36738af53081e9e2d02f70a9843e8c016789f
font_02_sfnt_off0001163a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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