Malicious PDF — malware analysis report

Static analysis result for SHA-256 a07695ae293a8167…

MALICIOUS

PDF

77.0 KB Created: 2020-11-18 21:50:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 579668a658b9dfbc17b0368e58a66a8b SHA-1: 1ef237230e2f9cc854b2ab113f573668a7a5da02 SHA-256: a07695ae293a8167df69e96158d4c54726d340cf047eccbac2c7842ca960efd5
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafffi.ru', which is likely a phishing domain. The document body, though heavily obfuscated, suggests a lure related to 'Ejercicios de acentuacion pdf'. No scripts were extracted, but the presence of an external URI in a malicious PDF strongly suggests a phishing attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafffi.ru/123?utm_term=ejercicios+de+acentuacion+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406775/normal_5f97ba95f29ae.pdfIn PDF document text
    • https://nebijuwako.weebly.com/uploads/1/3/4/3/134376342/vexorusuxukizo_femizozavax_jonotijub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5faa3eac51ef0.pdfIn PDF document text
    • https://xikosenazegan.weebly.com/uploads/1/3/0/7/130739601/279303.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425515/normal_5f9b0fca14a0e.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/76560270a.pdfIn PDF document text
    • https://dokakida.weebly.com/uploads/1/3/1/3/131380589/nedakiloput_bilofevuwuv_siweferog_vifinufawovuteg.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/gixawetopoli/unblocked_games_500_google_sites.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/61472424469.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1303cfd6-6bf4-46c6-a674-b1a8e11fa025/sajarujoxem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf440010-1872-4323-8cad-5a0c1fdd99c4/eagles_band_songs_paradise.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/25356223356.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA1 5032 bytes
SHA-256: 0107f12ddcf75f3aa19c11622b1a72b88913e289331548960c869af255a385c3
font_01_sfnt_off0000dcc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC9 11308 bytes
SHA-256: 8bfc6d31409fef457bd0df411d7c84c9c8c6bc00fa6ad19a519fa3ab29b7fc08
font_02_sfnt_off000101ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AD 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660
font_03_sfnt_off00011738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11738 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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