Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0451cf83e2f5d5c…

MALICIOUS

PDF

73.3 KB Created: 2021-03-23 21:02:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 364d434e98016d25099d7ff5b7c03809 SHA-1: e0b3b2aa5ea997287a1a54213106b7e70e2e74e7 SHA-256: b0451cf83e2f5d5c7104dfec0e4fef7c2a07ddc8589a7a3cb255345c37e1dca6
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified as a phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to 'bill nye motion pdf' to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/award?keyword=bill+nye+motion+pdf PDF link annotation
    • https://cdn.sqhk.co/vefuwebilux/gcVhgeo/wizard_of_oz_book_collection.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/4hgRhbR/nekogiroduxixomi.pdfIn PDF document text
    • https://wegakerovosa.weebly.com/uploads/1/3/0/8/130873826/3258390.pdfIn PDF document text
    • http://patamekuzon.iblogger.org/tusodexolomowibizezar.pdfIn PDF document text
    • http://xopidufixa.iblogger.org/53741191067.pdfIn PDF document text
    • https://ruregeriwak.weebly.com/uploads/1/3/4/6/134666462/dovazivili_tuvuxidos.pdfIn PDF document text
    • http://piwudev.iblogger.org/zajobibujugiwasexemular.pdfIn PDF document text
    • https://cdn.sqhk.co/pavetikedur/frbidhc/kemoli.pdfIn PDF document text
    • https://xopigitit.weebly.com/uploads/1/3/4/3/134339451/7437c10.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/fivebo/foxokatitevuw.pdfIn PDF document text
    • http://wazuvolixevafo.rf.gd/pesquisa_qualitativa_versus_pesquisa_quantitativa.pdfIn PDF document text
    • http://kitijowu.rf.gd/do_guys_use_emojis_often.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/48332436010.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/types_of_chemical_bonds_worksheet_answers_cacl2.pdfIn PDF document text
    • http://ginojakoli.rf.gd/subodulonabajujunu.pdfIn PDF document text
    • http://matemot.epizy.com/g_i_sheet_hsn_code.pdfIn PDF document text
    • https://1e1f235d-56dd-4976-b20d-d38e3fe7b172.filesusr.com/ugd/210b45_cb8d9026936f4e9b98b66ff8e7a411fd.pdf?index=trueIn PDF document text
    • https://54570836-76ea-4100-b78f-d1ba4c3cc0d1.filesusr.com/ugd/21ac59_717bc6b534c743adab0b2df141dedd34.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jivala/vutujefepetigimotewap.pdfIn PDF document text
    • http://fipomazuwasa.epizy.com/siemens_pure_hearing_aid_app.pdfIn PDF document text
    • http://gigefokuwubuk.rf.gd/estrategias_de_inversion.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_off0000d63e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63E 4644 bytes
SHA-256: 99271abc880d7da488660b831603eae2f5353ff2d86d865df050b92d3dfdf799
font_01_sfnt_off0000e5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FA 10692 bytes
SHA-256: 5f11694c8d6727ae097a0b7147ceecbaa75fbaff0706b9eea67f0ea738fe2a1a
font_02_sfnt_off00010a50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A50 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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