Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f31bb78a4941596…

MALICIOUS

PDF

79.1 KB Created: 2021-05-21 10:47:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5cf30caa36970c904adad1c2c0da537c SHA-1: 9529e7a52ad99250567d59bfc838805154e07036 SHA-256: 8f31bb78a4941596630b122935485e5fedbbcf4681349b1c99b2a507e170e72b
104 Risk Score

Malware Insights

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

The PDF file was detected as malicious by a ClamAV signature and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains text related to a Panasonic microwave manual, likely serving as a lure. The embedded URL `https://nipisod.ru/strik?utm_term=panasonic+inverter+microwave+manual+nn-sn651b` is a primary indicator of a potential phishing or malware distribution attempt.

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://nipisod.ru/strik?utm_term=panasonic+inverter+microwave+manual+nn-sn651b PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374518/normal_602d87a34f7e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415519/normal_5ffb4bfe29df9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424996/normal_5fe3c224c190d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490930/normal_606e610f30a2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476275/normal_601283a252383.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414341/normal_6047bafb6eb98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465392/normal_603319e98d625.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413973/normal_5fe6375b2f743.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/nafibanefexex/90756655648.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/nexebokinewofasubesaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/dalamemelavapezegoxezal.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/jajobapogewesejurudenebi.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/77533393756.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/bubipejodujan.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/amazon_business_case_study.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/wenalirupobipozixuduximu.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/garmin_2589_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/76544118049.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_off0000f7b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B6 5600 bytes
SHA-256: 644da583349052cafaf1338054cee293c28edfeaf0bb54bdb7b2ad2d69ac7549
font_01_sfnt_off00010ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD6 10636 bytes
SHA-256: 7c0bd946c93662953a955f2e5a695d69101a8c9548c0dd88b31939933790b6d8

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