Malicious PDF — malware analysis report

Static analysis result for SHA-256 23bf4d19ec7393ef…

MALICIOUS

PDF

82.5 KB Created: 2021-05-18 02:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: db0494dc052ceb67d8f53d5a7310130a SHA-1: fc75f837dec7c1e9e96c7bf56a1490b1277de5ee SHA-256: 23bf4d19ec7393ef5b8d892170567a37058cbc6fff09977108763400f5b55da8
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that points to a suspicious domain, identified by heuristics as a potential phishing or malicious link. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to redirect users to a malicious site, likely for phishing or malware delivery.

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://golowaki.ru/strik?utm_term=tajweed+rules+pdf+part+2 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4425217/normal_5fe5fb2cc24d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446275/normal_60344ffc0133f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392451/normal_606723748bc04.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/xijilesuzuxo/wd_my_cloud_personal_nas_drive_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c4ddc2a-abdc-4d30-9d45-b07fd12605bb/how_to_pay_attention_when_you_have_adhd.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/gibepafukikepezojuzu.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/gifebelefujugapizufu.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/consumer_reports_samsung_tv_ratings.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/guginogugadujunibo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9985bc13-5905-442b-93f1-2f88216158aa/natifixosor.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/iicsa_report_birmingham.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/ansathu_unath_sanakin_oya_song.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/exploding_kittens_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/how_to_divert_calls_from_office_phone_to_mobile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20b20000-46b1-415c-a023-2e7415efc8dd/refob.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/greek_and_latin_roots_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/nazumefenatem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef45876a-4008-4c75-ad8f-82a37c529f33/60419548443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe0ca8cd-7088-4397-b0f0-ef0447b7372e/present_simple_present_continuous_past_simple_exercises_elementary.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E6 5284 bytes
SHA-256: dbb557313cec1c43802ed4a0902c0ed72dd66419512191525a90b64184af0942
font_01_sfnt_off0000fc05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC05 10668 bytes
SHA-256: ce0e78df6bcdf0c2035d310b1c16fcd5f33cf0e4baf8c6b7ac9d14e4a56f7f1a
font_02_sfnt_off000120ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120AB 17676 bytes
SHA-256: 6d164dc60a4e3a435116ea55b534a240b8050800a7cadced5c30fe438d153b07

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