Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4a181de949cd329…

MALICIOUS

PDF

79.9 KB Created: 2021-03-04 14:05:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4faa34b69a28bd014fc82458564282a4 SHA-1: d2a18ac21b722759dd1761ad491233cf9280f90e SHA-256: a4a181de949cd329cd8fe693570472128969738d0754b812e3e6085019b3b8e1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan distribution attempt. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, likely to a malicious website, as evidenced by the URL 'https://nipisod.ru/strik?utm_term=how+did+greek+religion+affect+daily+life'. The document body is heavily obfuscated, preventing a detailed analysis of its specific content, but the overall structure points to a malicious intent to redirect users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/strik?utm_term=how+did+greek+religion+affect+daily+life PDF link annotation
    • https://tabikajodunel.weebly.com/uploads/1/3/0/7/130739544/lawamibeduvi.pdfIn PDF document text
    • https://gusoberususot.weebly.com/uploads/1/3/1/4/131454899/zuvixogekopuwigufiju.pdfIn PDF document text
    • https://nezemugobif.weebly.com/uploads/1/3/4/5/134519414/namodu-surokuxa.pdfIn PDF document text
    • https://fagugirawax.weebly.com/uploads/1/3/4/3/134388021/jefopijelusir_fibuguto_roraru.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/vonuxagupeduze/semumupabif.pdfIn PDF document text
    • https://5e024257-ca51-40df-b6b5-a3104c7b7124.filesusr.com/ugd/97368a_b4791fb24452491eb9922fe09a8977ce.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gonima/analysis_toolpak_excel_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8be3666-1211-4dfc-9cf1-2a43dbf83f53/vemesufapulum.pdfIn PDF document text
    • https://7be326e9-a1fd-4761-a84c-83c904220737.filesusr.com/ugd/37e945_eb2e60bdfa324b909edd691cbad5935e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dofufiri/video_asmaul_husna_anak.pdfIn PDF document text
    • https://a0f1d9c0-ea46-4e0e-9383-d87711d3127f.filesusr.com/ugd/1e3fb7_cc757b3aa6b04f4eab0a5a2913d029a2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/20502896192.pdfIn PDF document text
    • https://da99f664-88c7-4a27-98aa-0bbcec2e8f57.filesusr.com/ugd/66f3f9_4f2fc94b192140359a62eeedcec43a40.pdf?index=trueIn PDF document text
    • https://1f49b3f1-4b09-4f89-88df-03804352fc9a.filesusr.com/ugd/a51aec_fc335616bf41471686861cac9e470f8c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lebaxa/satagosebatefelid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca91afa9-3327-48d3-b6a1-47aa5b11e828/sobivusumefakusigovefura.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/movupijezozufipedumefa.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/81523072242.pdfIn PDF document text
    • http://nejimafalun.onlinewebshop.net/my_hampton_bay_fan_remote_not_working.pdfIn PDF document text
    • http://wemaxoseni.myartsonline.com/tablas_de_multiplicar_salteadas_para_imprimir_sin_resultados.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/43715961391.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/ashby_school_sixth_form_induction.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/ata_guidelines_for_papillary_thyroid_carcinoma.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_off0000fad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD6 5232 bytes
SHA-256: 1f6f1bb97a28c2e45a1f586e9759204d6d2cbb44a1958b26ee38541c3df9eb2d
font_01_sfnt_off00010ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCD 11000 bytes
SHA-256: 5abed8a3784824a45c310ff654d0126fbd829480068cc41ac242d43aaf66dc12

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