Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f24ae3e4652e13c…

MALICIOUS

PDF

97.7 KB Created: 2021-03-30 06:18:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 636a5a953d10897376544df73802fa14 SHA-1: 2f213a461b6d65408ed79cfcae269dcbd353f9b6 SHA-256: 1f24ae3e4652e13cc981a1254a8ea87632501f00f7a10adf9cae863d339e192d
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://seumenha.ru/strik?utm_term=early+civilizations+chart', which is likely the primary malicious destination. The document body, though heavily obfuscated, suggests a lure related to 'Early civilizations chart'. No scripts were extracted, but the presence of external URIs and the high risk score indicate a probable attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/strik?utm_term=early+civilizations+chart PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4389821/normal_5ff27452a95e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455196/normal_603616bbd0614.pdfIn PDF document text
    • https://digagewopaloz.weebly.com/uploads/1/3/4/6/134634746/b57ae2a2f0a42.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481825/normal_5fdd0da5c670b.pdfIn PDF document text
    • http://kojijeku.mygamesonline.org/todexaxime.pdfIn PDF document text
    • https://newavutija.weebly.com/uploads/1/3/1/8/131871734/287216.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490265/normal_5fc8cf25005d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411714/normal_6014a05aa983a.pdfIn PDF document text
    • https://satiragekawojiw.weebly.com/uploads/1/3/2/7/132740750/7536433.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486045/normal_60542af3cd8e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501212/normal_6002201fddc60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367631/normal_5feef499027ba.pdfIn PDF document text
    • http://mofolaz.22web.org/why_is_my_lay_z_spa_not_heating_up.pdfIn PDF document text
    • https://xerazagas.weebly.com/uploads/1/3/0/8/130813913/pepobite-sirarupajoro-kogewelineson.pdfIn PDF document text
    • https://vuzazaba.weebly.com/uploads/1/3/0/8/130813658/956715.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nisuzadusidu.epizy.com/astrocyte_scar_formation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9e8fa51-5f5f-4a5a-b0ce-3cf07830aade/lash_extension_training_manual.pdfIn PDF document text
    • http://lopakesuzuw.atwebpages.com/ltp_dictionary_of_selected_collocations_download.pdfIn PDF document text
    • http://temomuduzuba.epizy.com/aes_algorithm_in_cryptography.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2cdf549-ac95-483e-9a85-02b3c0277d54/office_365_end_user_tutorial.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_off000143d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143D1 5056 bytes
SHA-256: 542d907f73342d2dfe9d1d46302f40991e859b6e231b0d7b6fee82f92b056958
font_01_sfnt_off00015513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15513 10260 bytes
SHA-256: 1da99874910478a4979fc88a1baadabd36744d01efe2cde4a2f47f2e43991196

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