Malicious PDF — malware analysis report

Static analysis result for SHA-256 6374ff6ceecb0abc…

MALICIOUS

PDF

81.7 KB Created: 2021-02-24 23:11:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 592808cf895dc9edab4999e831b9e5a7 SHA-1: 9a34d4831cb7ea1756c30d96e3c8b148f535a2c6 SHA-256: 6374ff6ceecb0abc4c62e89469a2fd6b6faff36491b85ee40039b8ff13dd7664
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into visiting a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=2010+camaro+2lt+rs+package PDF link annotation
    • https://cdn.sqhk.co/xuxiropuwomo/jjTifaK/bleentoro_pro_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wemowubire/DgdQpgg/9061151159.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388426/normal_5feddad2ebe97.pdfIn PDF document text
    • http://hopecommunitynaz.com/conjunctions_test_worksheetufqkm.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxegaxujifo/eyijhgC/learn_thai_language_online.pdfIn PDF document text
    • https://cdn.sqhk.co/rizonozugaj/ic3icgj/wutizinixogilag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382966/normal_602e068249171.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498678/normal_5fd3073276848.pdfIn PDF document text
    • http://afracheat4.xyz/tukuleliburapekopenulejatzp58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496374/normal_5ff4cec0902ae.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/juzinaramip/2740595062.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/math_division_worksheets_5th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/transformers_autobot_stronghold_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/pubuguxujimifipab.pdfIn PDF document text
    • http://bopufadepop.epizy.com/45743956884.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/select_android_sdk_root_folder_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/stihl_chainsaw_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/tarekuzelupufatip.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/kirivudazatasu.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/hp_officejet_4500_all-in-one_printer_series_-_g510_firmware.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_off000101a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A0 5548 bytes
SHA-256: 1659a16968457b5aceba5a95098875930165aac3ebeee13256ba25bb0bc0c4f4
font_01_sfnt_off0001146c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1146C 10864 bytes
SHA-256: 923619e210441c5d203e437468a6c72afd9014077a8c73373a4668f653d56ee4

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