Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9b7a92ba60d1936…

MALICIOUS

PDF

76.8 KB Created: 2021-01-21 19:09:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 724a75f2493eb8c108300c09e3d8b148 SHA-1: ef9579a8feb9e72fd1e597b0003da7b42ca2648e SHA-256: a9b7a92ba60d1936f2d13547932e36d10c5a7df6da9e85c58221771a31eb9d85
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a suspicious domain, identified by heuristics as a potential phishing lure. 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 redirect the user to a malicious site, likely for phishing or malware delivery.

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://druttle.ru/aws?utm_term=chicago+style+citation+guidelines PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477630/normal_5fe9b141b133a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445871/normal_5fe94115f3f05.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446924/normal_5fe3ad166a3f3.pdfIn PDF document text
    • https://cdn.sqhk.co/vemetafije/UMJEicJ/pandora_free_music_radio_station.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449779/normal_5ff55506da822.pdfIn PDF document text
    • https://site-1166064.mozfiles.com/files/1166064/gradeup_app_apk_latest_version.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417024/normal_6000b8bd479dd.pdfIn PDF document text
    • https://site-1166652.mozfiles.com/files/1166652/best_template_video_editor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465688/normal_5ffd11f0e6e84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460690/normal_5fcea5c9159b8.pdfIn PDF document text
    • https://cdn.sqhk.co/wixakulu/gcwB2hf/endless_ducker_online_free.pdfIn PDF document text
    • https://site-1180086.mozfiles.com/files/1180086/slice_n_dice_restaurant.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483361/normal_5fe03600ed3ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384316/normal_60029e0d78dc8.pdfIn PDF document text
    • https://site-1177421.mozfiles.com/files/1177421/sixakabu.pdfIn PDF document text
    • https://site-1207104.mozfiles.com/files/1207104/pidizekazoxivukoguz.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/midizaxopazeji/ansible_vmware_module_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/android_tv_file_manager.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/work_placement_report_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/gunetar.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_off0000f044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF044 5112 bytes
SHA-256: 3ce0f461781c97d52b8c9312eccbf6c6ee8491aeeafca2d57a61288ee40b4f65
font_01_sfnt_off000101ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AB 10632 bytes
SHA-256: 62a7b46de11fb840ab6ec14d6c64be94b8509bf19b7175d926b21fed74443f44

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