Malicious PDF — malware analysis report

Static analysis result for SHA-256 09575d8c78d566e0…

MALICIOUS

PDF

80.5 KB Created: 2021-03-24 15:15:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2225ba5c3bbc3e79fad0d955c7eb0d54 SHA-1: dcb3eea432e6ee1f572f498a9f65188e969e65a6 SHA-256: 09575d8c78d566e00f5881796372cf2070baf7fe943a7c3ab63843390ee7ff36
104 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs and a 'download button' heuristic suggests the document is designed to trick the user into downloading a secondary payload. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/123?utm_term=books+on+akashic+records+pdf
    • http://yellownatural.space/how_to_reverse_data_order_in_excel_graphn1jp6.pdf
    • https://static.s123-cdn-static.com/uploads/4426816/normal_5fc9872957867.pdf
    • http://fukerijinexin.mygamesonline.org/how_much_do_army_reserves_make_monthly.pdf
    • http://fatunatet.getenjoyment.net/adverb_or_adjective_worksheet.pdf
    • http://pifavobiju.iblogger.org/waxumogixa.pdf
    • http://lelekelosutov.getenjoyment.net/obsessive_compulsive_personality_disorder_treatment.pdf
    • http://gazagidumow.mygamesonline.org/88786777617.pdf
    • http://sisogelodaze.medianewsonline.com/53536324980.pdf
    • http://xunetokawetik.sportsontheweb.net/auxiliares_de_comercio.pdf
    • http://toolsbestpricemicrometer.site/final_event_in_men_s_decathlonkuhed.pdf
    • https://static.s123-cdn-static.com/uploads/4408481/normal_600894575e938.pdf
    • https://cdn-cms.f-static.net/uploads/4470968/normal_6022b988e70f8.pdf
    • http://bezerojiw.scienceontheweb.net/academy_stars_3_pupil_s_book.pdf
    • http://labifovejes.mypressonline.com/wuwepixebukumigi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2f60c0de-bae8-48d8-8f3f-ce7907f87c52.filesusr.com/ugd/badafb_e95f2acaf37e4be39a3bea8ad3069251.pdf?index=true
    • https://9042e326-c85f-44e6-b9b6-0c206471fdba.filesusr.com/ugd/0d2fda_729504ba2c8d44bba2785adc70f10214.pdf?index=true
    • http://widuxetikos.epizy.com/biological_oxygen_demand_test_procedure.pdf
    • https://87164119-88a6-4d6d-a72f-b109cf2d88b9.filesusr.com/ugd/bd0a66_274fda7caffe4624860439b088ab3dbb.pdf?index=true
    • https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_ece071a14f2246a5b4abce02037057ef.pdf?index=true
    • https://2ac56fc1-f7ee-4366-9cb2-1681469c68ee.filesusr.com/ugd/b914b5_3e69ea327db7479e8f8a30d3b3685db2.pdf?index=true
    • http://sasukagisodubex.onlinewebshop.net/how_to_change_time_on_samsung_idcs_18d.pdf
    • http://buvekopap.epizy.com/kinarakaligaruxanos.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_off0000fc05.bin
7c61dcd180068f294946cb3cb390565800f8333ae158e4820730a599be09cf73		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC05 5324 bytes
font_01_sfnt_off00010e20.bin
6f86b851e030c7fa8d571be90483c2b5d50e0ad5966fe106a293974f98e0671b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E20 10884 bytes

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