Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ff7fbbe8d1f8a2c…

MALICIOUS

PDF

69.4 KB Created: 2020-11-18 14:35:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e14fe2ae3e1daa83e579730299d62e1a SHA-1: dca7a969c75216e3d70947c8c2bbdd274277f12d SHA-256: 3ff7fbbe8d1f8a2c687f0ccd90d3afa3f947a67d396f796a907d7d3776e7a532
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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/strik?utm_term=300+blk+subsonic+reloading+data In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379385/normal_5f8e28e550a7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385216/normal_5fa87841961bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374537/normal_5f8ed570de0c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420441/normal_5fa30c5d7e123.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368228/normal_5f8901edea535.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382966/normal_5f9de69fc6559.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/farefasejikap/after_burner_climax_apk_obb.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/vodipopuremewotemimiwet.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/beehive_class_9_rain_on_the_roof.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/maytag_neptune_washer_error_codes_nd.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/dubesuvafafoxapijedeza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c353f7bc-af5e-41c0-b1c1-c368e5515b66/46543147682.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/alejandro_dolina_libros.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_off0000d107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD107 5524 bytes
SHA-256: 122dadeae9601a8a8aeed87c1a89053686e98cd6d96a3b74ab01ec56eaea1b44
font_01_sfnt_off0000e3d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D4 10820 bytes
SHA-256: a20cc97561d478f9fc0bf713a1c72bd9e10427ee9afb795ffea5cc77c945fa61

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