Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dfc87dc94acad83…

MALICIOUS

PDF

83.2 KB Created: 2021-03-25 09:07:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: f4ce2f6c10ba79b336d3aa2057d37a59 SHA-1: c83abbc65ea576b68afd33684392108099b8717e SHA-256: 1dfc87dc94acad83b83635c4f19f3328f40a74cdc6e95f67a3f5cd4cdae775d7
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. The embedded URL `https://vilenefex.ru/award?keyword=fusionner+2+fichiers+pdf+mac` suggests a lure related to PDF manipulation, a common tactic for phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, likely involving the redirection of users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://vilenefex.ru/award?keyword=fusionner+2+fichiers+pdf+mac PDF link annotation
    • http://lovelyhouse.online/42564154534yayga.pdfIn PDF document text
    • http://fulukegoror.getenjoyment.net/mulajerubilejiku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494433/normal_6026a90693e90.pdfIn PDF document text
    • http://nutosuvitiraj.scienceontheweb.net/xikoluwo.pdfIn PDF document text
    • http://kapovulup.mywebcommunity.org/rakodono.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368227/normal_60028e608fea1.pdfIn PDF document text
    • http://kexedeziferu.sportsontheweb.net/49356051858.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445754/normal_5ffdc5cea00ba.pdfIn PDF document text
    • http://interior.estate/5135123489ipsgt.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/jepinebawo/education_flyer_templates_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bb749a3-d9a2-494e-8c6a-48a25e9431e6/engineering_circuit_analysis_by_hayt_8th_edition_solution_by_slader.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/jukanasarujekipedozojaso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/259f33bd-b236-4c5b-948f-2eb37b662ed3/temoxozosizok.pdfIn PDF document text
    • https://43e59f28-96d7-4988-bcd6-55bc25f76e69.filesusr.com/ugd/372bdc_35982a1c26bb43f6b3ee2b41b61a33a1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kavalukato/pharmaceutical_organic_chemistry_2_practical_book.pdfIn PDF document text
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_d4d173c2038642ff8816872a0032653c.pdf?index=trueIn PDF document text
    • https://e7ba4f66-d023-404d-a355-a5b98970f127.filesusr.com/ugd/cac9e4_b711b1bf762943adba89f885a7f6566b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bisiku/lotasipavovevogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00ba21d0-327c-40bb-a531-9a00e70f45d8/circular_simulacro_de_evacuacion_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eec72854-dea6-48e4-9cf2-b9aab0c4cfd2/68716217957.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5615403-5bbb-4caf-8cbb-e736c18a0843/funobalukamupetukoka.pdfIn PDF document text
    • https://a7193630-a032-4ee2-b136-33837135b76a.filesusr.com/ugd/fac845_e54d1d62d5234efc9f0242b6bae36f20.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vexeliku/vidmate_apps_video_install.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_off00010452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10452 5452 bytes
SHA-256: f2b1920b6b4bb649907f2c790a49d7e2919f2c75348e76cb4eab2554bfc5e7b3
font_01_sfnt_off000116b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B2 12148 bytes
SHA-256: 5d49c87974383c54cf1092ea44ba8e5096383595fe879105c81a86c8ec9bef92

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