Malicious PDF — malware analysis report

Static analysis result for SHA-256 796f3d86af41c826…

MALICIOUS

PDF

72.3 KB Created: 2021-02-14 16:20:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: fbaeb9f53c169ee9c1c82a01496af338 SHA-1: f617a55db03480da7f7feeadd23de45e4a98ded9 SHA-256: 796f3d86af41c8268ea1aeebc41ec716bcbf17ffae551b96505ef80c0df43a8f
104 Risk Score

Malware Insights

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

The PDF file contains a lure for a "free training attendance certificate template" and embeds external URLs, one of which is flagged as malicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the presence of embedded URLs and the overall classification suggest the document is designed to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/aws?utm_term=free+training+attendance+certificate+template PDF link annotation
    • http://youtube-subscribes.com/rfactor_yugo_download85bsp.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/jahihjc/vegafabafevis.pdfIn PDF document text
    • http://doordash.fun/tabela_anexos_simples_nacional_2019woy08.pdfIn PDF document text
    • https://zutiwijutorezaz.weebly.com/uploads/1/3/4/3/134354078/vetulesitusujil-nozujo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381529/normal_5ff80022bb12f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463560/normal_5fc8100446750.pdfIn PDF document text
    • http://idealslim-italiaoficial.site/5684905783ois58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466411/normal_5fd081005fecb.pdfIn PDF document text
    • http://interbank.link/25828959327k6km7.pdfIn PDF document text
    • http://coolmag.biz/312736279523fcqf.pdfIn PDF document text
    • http://frut-tree.site/blackberry_passport_install_androidfaex3.pdfIn PDF document text
    • https://jesebumu.weebly.com/uploads/1/3/4/6/134617302/8956942.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492900/normal_5ff9bd4092b1a.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/nowonovege/surfboard_sb6190_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/motorola_wireless_barcode_scanner_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/transformers_tiny_turbo_changers_series_2_list.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_off0000de51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE51 5252 bytes
SHA-256: bd2d4fe0d0b58697d96917cb0b1268a18e3c3c19da62b953eea0fa6217592898
font_01_sfnt_off0000f021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF021 10440 bytes
SHA-256: cad8f330aca2114821a03f5ab8bd8a01aa25d3a9063fb80d491ebe541b456995

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