Malicious PDF — malware analysis report

Static analysis result for SHA-256 c514d0ef1b1c17fb…

MALICIOUS

PDF

83.5 KB Created: 2021-03-31 07:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4ef7b7badf3ceb0effc05e7963f65dc SHA-1: 7b0fa88bdf6948c51dad6c1dede4a0b3f5a3a3c3 SHA-256: c514d0ef1b1c17fb7719aaa000ad962a2693f981f1233a6719af08fb575d02b1
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to educational content to entice users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/wix?keyword=national+geographic+incredible+human+machine+worksheet+answers
    • https://static.s123-cdn-static.com/uploads/4468537/normal_6001f5b135fe2.pdf
    • https://dabupekukuzew.weebly.com/uploads/1/3/2/6/132682022/d2e03512.pdf
    • https://cdn-cms.f-static.net/uploads/4452377/normal_604e1ef07dd75.pdf
    • https://cdn-cms.f-static.net/uploads/4489850/normal_604668907b95c.pdf
    • https://nakalefa.weebly.com/uploads/1/3/4/5/134522788/75bf72457a8f79.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/1c83562a-2240-44bd-8fe9-696000e9eba7/94280032138.pdf
    • https://uploads.strikinglycdn.com/files/71970eca-2c51-40a5-90e4-897e9b4f2938/how_to_use_left_formula_in_excel_for_date.pdf
    • https://s3.amazonaws.com/besafefaf/nubelenaparaladoxugujeve.pdf
    • http://jasosuwer.epizy.com/3239150403.pdf
    • https://8035c368-62b5-4e0f-b07c-73fd2baf85c9.filesusr.com/ugd/2ee8d4_b71aa6d2b4c845759d6807cb70cfe2af.pdf?index=true
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_3f700f20404c49ffaa203dc0c0da8a00.pdf?index=true
    • https://s3.amazonaws.com/leteraxewe/letter_from_hogwarts_template.pdf
    • http://sunizuz.rf.gd/block_caller_android_6.pdf
    • https://uploads.strikinglycdn.com/files/4ddf17d8-d093-43bd-a4ca-5871966661de/92213710436.pdf
    • http://nekajabosad.rf.gd/competition_law_books.pdf
    • https://c931c956-7f53-4e4e-96dc-27d7f003ba63.filesusr.com/ugd/b80c10_717c634c7d134962bdccd3b09f4bb9f5.pdf?index=true
    • https://ed0f7819-48b4-4c0d-9119-93de03d81b9c.filesusr.com/ugd/e481ce_99bbcb166ff54e6189dbb4ac8ca15b3d.pdf?index=true
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_414e3a8736824248b046d395cd3aff9f.pdf?index=true
    • https://s3.amazonaws.com/wiremeresegikon/24356126554.pdf
    • http://desiwafinu.epizy.com/summertime_gershwin_piano_sheet_music.pdf
    • https://s3.amazonaws.com/lotibabakuj/zabonutoduwalelejoxuzos.pdf
    • https://uploads.strikinglycdn.com/files/6f8e7379-16aa-4ac2-a51a-526b9013bace/sigavi.pdf
    • https://uploads.strikinglycdn.com/files/526feb70-54f1-46e3-bf0a-84211317e422/fcc_ham_radio_license_levels.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7b4.bin
bd54c59c311bec80b0f7a9980333769e57162df9a43d1bd4c9f00d4e07bac46f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B4 5636 bytes
font_01_sfnt_off00010ab1.bin
9882b21d211283df813dae191846742fabee81f688f82cd020490bed0d5ab11c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB1 11404 bytes
font_02_sfnt_off0001318c.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1318C 4324 bytes

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