Malicious PDF — malware analysis report

Static analysis result for SHA-256 d42916bd42b30c52…

MALICIOUS

PDF

77.7 KB Created: 2021-04-01 03:19:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5c9f78c1c335fc3f4ebbdd45db3e6909 SHA-1: 59a5ae33bd5299c182706b48726a0aa08192f945 SHA-256: d42916bd42b30c5285f63303446645f4e9aa6cdf4d4dee551568b926ca604065
104 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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://kuzutuzo.ru/award?keyword=pdf+file+editor+app PDF link annotation
    • https://buritozube.weebly.com/uploads/1/3/0/7/130775753/kozede.pdfIn PDF document text
    • http://rumigiwataj.getenjoyment.net/cholera_pathogenesis.pdfIn PDF document text
    • http://punejew.mygamesonline.org/gordon_wood_the_radicalism_of_the_american_revolution.pdfIn PDF document text
    • http://fringigejy.site/6980650408p97cg.pdfIn PDF document text
    • https://cdn.sqhk.co/wenewojufaj/g8KDigA/jokakaveveletefomevugid.pdfIn PDF document text
    • https://cdn.sqhk.co/linotepibubi/idgdgcJ/hand_drill_fire_materials.pdfIn PDF document text
    • https://gedepaxu.weebly.com/uploads/1/3/1/3/131378821/2014909.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/ihijlEH/kakeg.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/que_tipos_de_funciones_hay_en_matematicas.pdfIn PDF document text
    • https://cdn.sqhk.co/bomoxale/YjgR3Hc/total_party_kill_games.pdfIn PDF document text
    • http://bettermoneytips.com/troy_bilt_lawn_mower_bag9adbk.pdfIn PDF document text
    • http://monstergym.ru/zuligekopesosovinavebaos2xa.pdfIn PDF document text
    • https://cdn.sqhk.co/japokaxe/gcjiFMw/men_s_haircut_fade_sides_long_top.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/gedesisumi/how_to_remove_rainbow_hepa_filter.pdfIn PDF document text
    • http://gemovimuwopete.atwebpages.com/counterfeit_gods_timothy_keller.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/26944767711.pdfIn PDF document text
    • https://e432c3f7-acc0-403b-bc7f-1b8c16782643.filesusr.com/ugd/6a4899_b282ed9a273e4e26bd351333e5f64d6e.pdf?index=trueIn PDF document text
    • https://34570882-574e-4d25-8c0e-d8b9b6c2967f.filesusr.com/ugd/cb2bed_9957dab35eb842f99b7a8afb6ed7a3af.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/asus_router_rt-ac68u_merlin.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/diferencias_faringitis_viral_y_bacteriana.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/cdf_discrete_uniform_distribution.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_off0000f247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF247 4860 bytes
SHA-256: d4bfcaeea44ce48f64d764c30c6163669206405f070fde056881c5610df1ceaa
font_01_sfnt_off000102de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DE 11100 bytes
SHA-256: 3ebcd05c132f015d676c08b8fcf55781315754d1908435ac59785d441295dd64

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