Malicious PDF — malware analysis report

Static analysis result for SHA-256 7796d66e68def246…

MALICIOUS

PDF

80.7 KB Created: 2021-03-28 09:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 870fa19ca70d4d0a0491fbacf8c2d67c SHA-1: d85d3c9524590015b05b9d96641c4d93533686cf SHA-256: 7796d66e68def2460c8926860ad361df0d6e09be2f063488b2694f8058d81045
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to 'broiler chicken production'. No scripts were extracted, but the presence of external URIs and the overall malicious verdict strongly indicate an attempt to compromise the user.

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://jacksth.ru/award?keyword=broiler+chicken+production+in+nigeria+pdf
    • https://cdn-cms.f-static.net/uploads/4470837/normal_5fd9b27bde14c.pdf
    • http://ifeelgood.club/90803175632kozbg.pdf
    • https://cdn.sqhk.co/tozerutiwezu/8dKjfjd/elite_motos_2_dinheiro_infinito_atualizado.pdf
    • https://cdn-cms.f-static.net/uploads/4421224/normal_604e429aae8d5.pdf
    • https://cdn.sqhk.co/wisivelu/ELJifhd/motorola_g_power_unlocked.pdf
    • https://static.s123-cdn-static.com/uploads/4426816/normal_60017656b7fcc.pdf
    • http://sberetransfer.online/fiteduzaveshyzs.pdf
    • https://static.s123-cdn-static.com/uploads/4416929/normal_5fde060925d85.pdf
    • https://cdn.sqhk.co/wewowedim/hjjNhdG/mesh_dipper_catfish_dip_bait_holder.pdf
    • http://sarhello.online/windows_loader_daz_2.2_22to87.pdf
    • https://cdn.sqhk.co/ributexovek/aggjhib/bovavorusisav.pdf
    • https://cdn-cms.f-static.net/uploads/4388183/normal_602097d1a4d95.pdf
    • https://cdn.sqhk.co/naboxolat/ghdjcqK/jenkins_sonarqube_report.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ab9101c8-a046-40a0-ba79-761bab9f3367.filesusr.com/ugd/61fb7c_16c00cd6c0c5413ea5ad2f3297e06fe3.pdf?index=true
    • https://dacf5b84-f80e-4bd8-bb7f-22aad20a1cd8.filesusr.com/ugd/285be4_23ba274d8dc44e7e80d6f0c04d87a4aa.pdf?index=true
    • https://s3.amazonaws.com/fedufiporara/88192406725.pdf
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_f38ae7fdaad64068884f67560ce11108.pdf?index=true
    • http://xugonowelimije.epizy.com/italian_pronunciation_guide_audio.pdf
    • https://cdb53ace-3f3f-41e1-823e-0ecf3add8ba2.filesusr.com/ugd/47e9e0_fdfd96ea980d42a9a846eeb7d1b69d8b.pdf?index=true
    • https://s3.amazonaws.com/debiwelof/renaissance_music_styles_and_forms.pdf
    • http://womumilo.epizy.com/badusakitowa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe5d.bin
b445392cfbdb0c34a2dae650281204d98e6100e87befd1cebf0ad304bc7b5b01		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5D 5352 bytes
font_01_sfnt_off0001108e.bin
dbf724ce04e8304be08191adfec9eec272607b9cdcacf16f8a1bcd91c34994cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1108E 10732 bytes

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