Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf465e29a7be16fc…

MALICIOUS

PDF

80.2 KB Created: 2021-01-06 05:35:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 19be68678b4f64ad9e9d5d496cd13ff0 SHA-1: 11d6e95d27d9732fa21a9fb2a12a2096f2d08a80 SHA-256: cf465e29a7be16fce5ad0d93826af51a92c16f4ea6205a31a23b60f0fd771c8e
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the presence of a malicious URL is a high-priority indicator for this phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://traffking.ru/aws?utm_term=cplr+errata+sheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387814/normal_5fa2e5799c1cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387939/normal_5fa0ede9a1edb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473379/normal_5fe31ecf8c301.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503692/normal_5fb2f586c80f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446264/normal_5fb684fc15047.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487903/normal_5fc4699bcfc71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495264/normal_5faf8c8476087.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/rafiralexezol/mayrhofen_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/70807675562.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/crystal_report_viewer_9_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/8899802584.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a60e03bc-b8a2-404c-87eb-e3614a82010f/rewodabenemesarujobaza.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/aashiqui_1_songs_naa_songs.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_off0000fd61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD61 4812 bytes
SHA-256: da192560c33b7895cc0f6599b52eb9c6edd50de03e134bcd50e4b90902e94a8b
font_01_sfnt_off00010da5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA5 11260 bytes
SHA-256: 749dadd1a5ae4a5700e65f529365c1b4db1b3967f104efa1d9bdf8d7431239b5

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