Malicious PDF — malware analysis report

Static analysis result for SHA-256 0367c0b64f01e12b…

MALICIOUS

PDF

77.5 KB Created: 2021-04-04 14:26:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 07bc9bfbdeb9878353a53d28f1cd30b2 SHA-1: eb0770a2049ebe5fb10a7791c3ba3981634cab55 SHA-256: 0367c0b64f01e12b695c17d7cb71b05c96317a1ca5add72e44d27ea7e30d30fe
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 as part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, and the embedded URL is the primary indicator of compromise. No scripts were extracted, but the PDF structure itself facilitated the embedding of the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/strik?utm_term=how+much+oil+does+a+10+hp+tecumseh+engine PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370270/normal_6057f8d96839b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369343/normal_6025382688cbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371783/normal_60263fdf95006.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/pusori/mojutasuritowepoxerejidod.pdfIn PDF document text
    • http://kobuxeniduf.rf.gd/44506846678.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/tactics_for_listening_basic_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1c9cda3-cd6f-483c-9217-44b2943ce1a6/does_the_usps_operate_in_puerto_rico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cf9edbf-3244-410e-b8cd-d912fd745e46/can_get_directv_to_connect_to_internet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4996dd31-931b-4ce8-8059-5aa1ea6ce8e3/33113563795.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a7aa4fb-6865-4084-914b-56d291029fc9/gisujejimovi.pdfIn PDF document text
    • http://porokeziz.rf.gd/depression_questionnaire_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1f17210-7bc8-4e93-aaf0-9b98b1f5dbb8/2017_subaru_forester_2.5_i_premium_standard_features.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/042db471-9ceb-41b8-ad40-6629fd9f1ed8/88336873186.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/mowivupinapomi.pdfIn PDF document text
    • http://ledafavegarawam.rf.gd/totamiwid.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/go_past_participle_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1632b9a8-2bc4-4343-b95c-ffaf7fefc754/54482087481.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/bopikegifivitomakudime.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/budomolewepuwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c2d26a9-b03b-45a0-b735-e6403a6ada04/vobojebopij.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/latin_music_usa_bridges_worksheet_answers.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_off0000f19b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19B 5640 bytes
SHA-256: 087013ea17087c6a7b2d583343176a1e624b01ca1fde7d7f8f6aa7c8fa1071f0
font_01_sfnt_off000104b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B8 10396 bytes
SHA-256: f6fea6afc2e0916517f1311361f9e5b96071f5655e9a22c280f42d87af990269

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