Malicious PDF — malware analysis report

Static analysis result for SHA-256 a950dba320cc9d41…

MALICIOUS

PDF

72.2 KB Created: 2021-03-03 23:29:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f0e6b37b489b28faacfaf40a65b7dbb3 SHA-1: 51369da5a1b6fcc4866220718d126b27a2f4d039 SHA-256: a950dba320cc9d415ee8dabce3d333655cacd2b167b6cab871b9a20610a1eeff
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://kuzutuzo.ru/wix?keyword=numeros+enteros+en+ingles PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383449/normal_5fcf210c40c1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389604/normal_602ab28ebcb93.pdfIn PDF document text
    • http://lnstagram-helping.live/el_proceso_de_la_investigacion_cientifica_mario_tamayo_y_tamayo_5ta_edicionzrkq6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484994/normal_6037d737482e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495536/normal_6035ee454be50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402520/normal_5fc9edefaf1f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450516/normal_5fdbd17be6ac7.pdfIn PDF document text
    • http://3203epworthcres.com/beyonce_4_deluxe_album_free_download7lzx2.pdfIn PDF document text
    • http://operationhomeplate.com/how_to_type_cubed_on_chromebookzfasl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415070/normal_5fe70cd88ac93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479933/normal_6028c416b7b69.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/zopenave/how_to_prevent_from_identity_theft.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/dawobumitarasugolono.pdfIn PDF document text
    • http://zuzekawi.rf.gd/bourbaki_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/27363014636.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/idiots_guide_to_portrait_photography.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/articles_of_incorporation_template_for_non_profit.pdfIn PDF document text
    • http://radagosedapisat.epizy.com/osrs_darkness_of_hallowvale_quest_guide.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_off0000d117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD117 4648 bytes
SHA-256: 56a65059671fe52abffe6c7b935947e73e77e6a00699d1db5fd9d5f05f11ee59
font_01_sfnt_off0000e0cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CF 10884 bytes
SHA-256: 5079d9a7e037ffcf4a5bdaee139fb417f0b1e68325bee9b5e8c8ade10cfe4ee4
font_02_sfnt_off00010436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10436 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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