Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b8573899c4a2c7…

MALICIOUS

PDF

76.0 KB Created: 2021-04-01 05:48:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ab55307d29fe9debc80f99f1ede412e SHA-1: 807ca8ae7d1b339cff7e825b44bea218916730bb SHA-256: e9b8573899c4a2c7830b68da2f5e704ad9186d218e678da55c2b6e1b3785ae6f
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely intended for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI heuristic suggest an attempt to exploit user interaction via a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/award?keyword=soal+medan+listrik+pdf
    • http://4bochki.ru/99384887911r17bu.pdf
    • https://cdn-cms.f-static.net/uploads/4459328/normal_6064457aef36c.pdf
    • http://kukukoboda.22web.org/48243105137.pdf
    • https://cdn-cms.f-static.net/uploads/4476767/normal_602b7c296b9e2.pdf
    • https://cdn-cms.f-static.net/uploads/4423148/normal_5fe79322156f6.pdf
    • http://tevuvisena.iblogger.org/ditinexuxefetab.pdf
    • http://extraevents.ru/the_importance_of_being_earnest_movie_netflixemyk5.pdf
    • https://cdn-cms.f-static.net/uploads/4393762/normal_60543f5638415.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pimurif.rf.gd/28_glaubenspunkte_adventisten.pdf
    • https://e42ce0b3-f376-4cb5-9abe-507fdbb9570c.filesusr.com/ugd/603474_44a3b832c632471c8158a2c49b457c78.pdf?index=true
    • https://9d76d0c6-5807-43ac-a2ba-7b4112d1a20a.filesusr.com/ugd/5cd33b_8fad49a18f444e2bb94129848cd960c9.pdf?index=true
    • http://ditajizuru.rf.gd/tuhs_academic_planning_guide.pdf
    • https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_2c1166362de9445580b38f8742526a16.pdf?index=true
    • https://810dce77-56ab-4324-823a-3549757f4eab.filesusr.com/ugd/1fad07_bb59b7d27e36499ab527504bbb82b6a6.pdf?index=true
    • http://zodenowukafowe.rf.gd/sun_joe_spx3000_xtream_pressure_washer.pdf
    • https://uploads.strikinglycdn.com/files/9f5028c7-879a-46ba-a137-69ef72e7245f/where_can_you_learn_aramaic.pdf
    • https://uploads.strikinglycdn.com/files/dfa375c1-37cf-41c5-9619-dbb275b0d3e8/best_drum_beats_for_beginners.pdf
    • https://6998e30b-c911-4113-ab34-4c15204891c7.filesusr.com/ugd/429b25_6d0b8b47084746879affd9381f226089.pdf?index=true
    • http://zisoramemib.rf.gd/25848438294.pdf
    • https://uploads.strikinglycdn.com/files/22395296-5027-4f32-bcc8-bac217c822e2/gagotowunixowalef.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_off0000eac4.bin
59b09ff71c54f1441774f273de5bc62d41300208866e1c90f9e21b71cadc8a74
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC4 5352 bytes
font_01_sfnt_off0000fce2.bin
0560a323a5c5867b93a8be2d7691ee687bf60ae389ac07fec58c6c18c76a7aa4
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE2 11096 bytes