Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b0ff0c9c137602b…

MALICIOUS

PDF

68.6 KB Created: 2021-01-06 15:07:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 4c3707720720a61281ca15b1a1410afb SHA-1: 7515ccc3f179f33070e1160930e61d2d4805d103 SHA-256: 4b0ff0c9c137602baf86d2bc17cebbad0748a951d57c66eda8b6062dc6a76118
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'ggtraff.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the redirector suggest an attempt to lure users to a malicious site, likely for phishing or to download further malware. The ClamAV detection further supports the malicious classification.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ggtraff.ru/aws?utm_term=industria+alimentaria+en+el+ecuador+pdf In PDF document text
    • https://cdn.sqhk.co/sovokeduseb/fgdhfvB/93082847023.pdfIn PDF document text
    • https://rogewakaz.weebly.com/uploads/1/3/2/8/132815912/49928c7429.pdfIn PDF document text
    • https://tufojeju.weebly.com/uploads/1/3/0/7/130740258/8346152.pdfIn PDF document text
    • https://cdn.sqhk.co/guzunilepin/MqOjbha/18205290975.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444864/normal_5fbeda24ce856.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/tibanepoxilibud/android_appcompat_theme_dialog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/beb7b17c-4c56-46a4-b8e2-1dd5ea0c04f3/16273588146.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/filled_performance_appraisal_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/469f0023-8a0e-4fdc-95f7-f48bd54e347d/the_broken_cross.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a99ae05b-af62-4365-a671-0fd350860097/90016993654.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbbcf4fd-ad29-408d-9625-9c797bc452c9/boponebowok.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/2560748770.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_off0000cc8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC8C 5236 bytes
SHA-256: edeab6dde639f6b21d976e9b02d7e283089890c1e199d9f4b03fa5a4d26f8570
font_01_sfnt_off0000de45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE45 11544 bytes
SHA-256: 6f9239e9df71b5d356987e55a31b54fe04eeceb34d85db5e793dd6be922d443a

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